The tz->lock must be hold during the looping over the instances in that
thermal zone. This lock was missing in the governor code since the
beginning, so it's hard to point into a particular commit.
CC: stable@vger.kernel.org # 4.4+ Signed-off-by: Lukasz Luba <lukasz.luba@arm.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20210422153624.6074-2-lukasz.luba@arm.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Slab OOB issue is scanned by KASAN in cpu_power_to_freq().
If power is limited below the power of OPP0 in EM table,
it will cause slab out-of-bound issue with negative array
index.
Return the lowest frequency if limited power cannot found
a suitable OPP in EM table to fix this issue.
Fixes: 371a3bc79c11b ("thermal/drivers/cpufreq_cooling: Fix wrong frequency converted from power") Signed-off-by: brian-sy yang <brian-sy.yang@mediatek.com> Signed-off-by: Michael Kao <michael.kao@mediatek.com> Reviewed-by: Lukasz Luba <lukasz.luba@arm.com> Cc: stable@vger.kernel.org #v5.7 Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20201229050831.19493-1-michael.kao@mediatek.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Commit 9af7706492f9 ("lib/vsprintf: Remove support for %pF and %pf in
favour of %pS and %ps") removed support for %pF and %pf, and correctly
removed the handling of those cases in vbin_printf(). However, the
corresponding cases in bstr_printf() were left behind.
In the same series, %pf was re-purposed for dealing with
fwnodes (3bd32d6a2ee6, "lib/vsprintf: Add %pfw conversion specifier
for printing fwnode names").
So should anyone use %pf with the binary printf routines,
vbin_printf() would (correctly, as it involves dereferencing the
pointer) do the string formatting to the u32 array, but bstr_printf()
would not copy the string from the u32 array, but instead interpret
the first sizeof(void*) bytes of the formatted string as a pointer -
which generally won't end well (also, all subsequent get_args would be
out of sync).
Fixes: 9af7706492f9 ("lib/vsprintf: Remove support for %pF and %pf in favour of %pS and %ps") Cc: stable@vger.kernel.org Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Petr Mladek <pmladek@suse.com> Link: https://lore.kernel.org/r/20210423094529.1862521-1-linux@rasmusvillemoes.dk Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When loading a device-mapper table for a request-based mapped device,
and the allocation/initialization of the blk_mq_tag_set for the device
fails, a following device remove will cause a double free.
When allocation/initialization of the blk_mq_tag_set fails in
dm_mq_init_request_queue(), it is uninitialized/freed, but the pointer
is not reset to NULL; so when dev_remove() later gets into
dm_mq_cleanup_mapped_device() it sees the pointer and tries to
uninitialize and free it again.
Fix this by setting the pointer to NULL in dm_mq_init_request_queue()
error-handling. Also set it to NULL in dm_mq_cleanup_mapped_device().
Cc: <stable@vger.kernel.org> # 4.6+ Fixes: 1c357a1e86a4 ("dm: allocate blk_mq_tag_set rather than embed in mapped_device") Signed-off-by: Benjamin Block <bblock@linux.ibm.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This division bug meant the search for free metadata space could skip
the final allocation bitmap's worth of entries. Fix affects DM thinp,
cache and era targets.
Cc: stable@vger.kernel.org Signed-off-by: Joe Thornber <ejt@redhat.com> Tested-by: Ming-Hung Tsai <mtsai@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
It was reported that a fix to the ring buffer recursion detection would
cause a hung machine when performing suspend / resume testing. The
following backtrace was extracted from debugging that case:
Since the fix to the recursion detection would allow a single recursion to
happen while tracing, this lead to the trace_clock_global() taking a spin
lock and then trying to take it again:
ring_buffer_lock_reserve() {
trace_clock_global() {
arch_spin_lock() {
queued_spin_lock_slowpath() {
/* lock taken */
(something else gets traced by function graph tracer)
ring_buffer_lock_reserve() {
trace_clock_global() {
arch_spin_lock() {
queued_spin_lock_slowpath() {
/* DEAD LOCK! */
Tracing should *never* block, as it can lead to strange lockups like the
above.
Restructure the trace_clock_global() code to instead of simply taking a
lock to update the recorded "prev_time" simply use it, as two events
happening on two different CPUs that calls this at the same time, really
doesn't matter which one goes first. Use a trylock to grab the lock for
updating the prev_time, and if it fails, simply try again the next time.
If it failed to be taken, that means something else is already updating
it.
Link: https://lkml.kernel.org/r/20210430121758.650b6e8a@gandalf.local.home Cc: stable@vger.kernel.org Tested-by: Konstantin Kharlamov <hi-angel@yandex.ru> Tested-by: Todd Brandt <todd.e.brandt@linux.intel.com> Fixes: b02414c8f045 ("ring-buffer: Fix recursion protection transitions between interrupt context") # started showing the problem Fixes: 14131f2f98ac3 ("tracing: implement trace_clock_*() APIs") # where the bug happened
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=212761 Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The default max PID is set by PID_MAX_DEFAULT, and the tracing
infrastructure uses this number to map PIDs to the comm names of the
tasks, such output of the trace can show names from the recorded PIDs in
the ring buffer. This mapping is also exported to user space via the
"saved_cmdlines" file in the tracefs directory.
But currently the mapping expects the PIDs to be less than
PID_MAX_DEFAULT, which is the default maximum and not the real maximum.
Recently, systemd will increases the maximum value of a PID on the system,
and when tasks are traced that have a PID higher than PID_MAX_DEFAULT, its
comm is not recorded. This leads to the entire trace to have "<...>" as
the comm name, which is pretty useless.
Instead, keep the array mapping the size of PID_MAX_DEFAULT, but instead
of just mapping the index to the comm, map a mask of the PID
(PID_MAX_DEFAULT - 1) to the comm, and find the full PID from the
map_cmdline_to_pid array (that already exists).
This bug goes back to the beginning of ftrace, but hasn't been an issue
until user space started increasing the maximum value of PIDs.
The idx_to_offset() function returns type int (32-bit signed), but
MSR_PKG_ENERGY_STAT is u32 and would be interpreted as a negative number.
The end result is that it hits the if (offset < 0) check in update_msr_sum()
which prevents the timer callback from updating the stat in the background when
long durations are used. The similar issue exists in offset_to_idx() and
update_msr_sum(). Fix this issue by converting the 'int' to 'off_t' accordingly.
Fixes: 9972d5d84d76 ("tools/power turbostat: Enable accumulate RAPL display") Signed-off-by: Calvin Walton <calvin.walton@kepstin.ca> Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The rsi_resume() does access the bus to enable interrupts on the RSI
SDIO WiFi card, however when calling sdio_claim_host() in the resume
path, it is possible the bus is already claimed and sdio_claim_host()
spins indefinitelly. Enable the SDIO card interrupts in resume_noirq
instead to prevent anything else from claiming the SDIO bus first.
Fixes: 20db07332736 ("rsi: sdio suspend and resume support") Signed-off-by: Marek Vasut <marex@denx.de> Cc: Amitkumar Karwar <amit.karwar@redpinesignals.com> Cc: Angus Ainslie <angus@akkea.ca> Cc: David S. Miller <davem@davemloft.net> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Kalle Valo <kvalo@codeaurora.org> Cc: Karun Eagalapati <karun256@gmail.com> Cc: Martin Kepplinger <martink@posteo.de> Cc: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm> Cc: Siva Rebbagondla <siva8118@gmail.com> Cc: netdev@vger.kernel.org Cc: stable@vger.kernel.org Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Link: https://lore.kernel.org/r/20210327235932.175896-1-marex@denx.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
syzbot reported memory leak in tty/vt.
The problem was in VT_DISALLOCATE ioctl cmd.
After allocating unimap with PIO_UNIMAP it wasn't
freed via VT_DISALLOCATE, but vc_cons[currcons].d was
zeroed.
According to the programming guide, to switch mode for DRD controller,
the driver needs to do the following.
To switch from device to host:
1. Reset controller with GCTL.CoreSoftReset
2. Set GCTL.PrtCapDir(host mode)
3. Reset the host with USBCMD.HCRESET
4. Then follow up with the initializing host registers sequence
To switch from host to device:
1. Reset controller with GCTL.CoreSoftReset
2. Set GCTL.PrtCapDir(device mode)
3. Reset the device with DCTL.CSftRst
4. Then follow up with the initializing registers sequence
Currently we're missing step 1) to do GCTL.CoreSoftReset and step 3) of
switching from host to device. John Stult reported a lockup issue seen
with HiKey960 platform without these steps[1]. Similar issue is observed
with Ferry's testing platform[2].
So, apply the required steps along with some fixes to Yu Chen's and John
Stultz's version. The main fixes to their versions are the missing wait
for clocks synchronization before clearing GCTL.CoreSoftReset and only
apply DCTL.CSftRst when switching from host to device.
The START_TRANSFER command needs to be executed while in ON/U0 link
state (with an exception during register initialization). Don't use
dwc->link_state to check this since the driver only tracks the link
state when the link state change interrupt is enabled. Check the link
state from DSTS register instead.
Note that often the host already brings the device out of low power
before it sends/requests the next transfer. So, the user won't see any
issue when the device starts transfer then. This issue is more
noticeable in cases when the device delays starting transfer, which can
happen during delayed control status after the host put the device in
low power.
The programming guide incorrectly stated that the DCFG.bInterval_m1 must
be set to 0 when operating in fullspeed. There's no such limitation for
all IPs. See DWC_usb3x programming guide section 3.2.2.1.
Fixes bug with the handling of more than one language in
the string table in f_fs.c.
str_count was not reset for subsequent language codes.
str_count-- "rolls under" and processes u32 max strings on
the processing of the second language entry.
The existing bug can be reproduced by adding a second language table
to the structure "strings" in tools/usb/ffs-test.c.
Upon driver unbind usb_free_all_descriptors() function frees all
speed descriptor pointers without setting them to NULL. In case
gadget speed changes (i.e from super speed plus to super speed)
after driver unbind only upto super speed descriptor pointers get
populated. Super speed plus desc still holds the stale (already
freed) pointer. Fix this issue by setting all descriptor pointers
to NULL after freeing them in usb_free_all_descriptors().
Fixes: f5c61225cf29 ("usb: gadget: Update function for SuperSpeedPlus")
cc: stable@vger.kernel.org Reviewed-by: Peter Chen <peter.chen@kernel.org> Signed-off-by: Hemant Kumar <hemantk@codeaurora.org> Signed-off-by: Wesley Cheng <wcheng@codeaurora.org> Link: https://lore.kernel.org/r/1619034452-17334-1-git-send-email-wcheng@codeaurora.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix a general protection fault reported by syzbot due to a race between
gadget_setup() and gadget_unbind() in raw_gadget.
The gadget core is supposed to guarantee that there won't be any more
callbacks to the gadget driver once the driver's unbind routine is
called. That guarantee is enforced in usb_gadget_remove_driver as
follows:
usb_gadget_disconnect(udc->gadget);
if (udc->gadget->irq)
synchronize_irq(udc->gadget->irq);
udc->driver->unbind(udc->gadget);
usb_gadget_udc_stop(udc);
usb_gadget_disconnect turns off the pullup resistor, telling the host
that the gadget is no longer connected and preventing the transmission
of any more USB packets. Any packets that have already been received
are sure to processed by the UDC driver's interrupt handler by the time
synchronize_irq returns.
But this doesn't work with dummy_hcd, because dummy_hcd doesn't use
interrupts; it uses a timer instead. It does have code to emulate the
effect of synchronize_irq, but that code doesn't get invoked at the
right time -- it currently runs in usb_gadget_udc_stop, after the unbind
callback instead of before. Indeed, there's no way for
usb_gadget_remove_driver to invoke this code before the unbind callback.
To fix this, move the synchronize_irq() emulation code to dummy_pullup
so that it runs before unbind. Also, add a comment explaining why it is
necessary to have it there.
The Venus v1 behaves differently comparing with the other Venus
version in respect to capability parsing and when they are send
to the driver. So we don't need to initialize hfi parser for
multiple invocations like what we do for > v1 Venus versions.
When controls are used together with the Request API, then for
each request a v4l2_ctrl_handler struct is allocated. This contains
the controls that can be set in a request. If a control is *not* set in
the request, then the value used in the most recent previous request
must be used, or the current value if it is not found in any outstanding
requests.
The framework tried to find such a previous request and it would set
the 'req' pointer in struct v4l2_ctrl_ref to the v4l2_ctrl_ref of the
control in such a previous request. So far, so good. However, when that
previous request was applied to the hardware, returned to userspace, and
then userspace would re-init or free that request, any 'ref' pointer in
still-queued requests would suddenly point to freed memory.
This was not noticed before since the drivers that use this expected
that each request would always have the controls set, so there was
never any need to find a control in older requests. This requirement
was relaxed, and now this bug surfaced.
It was also made worse by changeset 2fae4d6aabc8 ("media: v4l2-ctrls: v4l2_ctrl_request_complete() should always set ref->req")
which increased the chance of this happening.
The use of the 'req' pointer in v4l2_ctrl_ref was very fragile, so
drop this entirely. Instead add a valid_p_req bool to indicate that
p_req contains a valid value for this control. And if it is false,
then just use the current value of the control.
Note that VIDIOC_G_EXT_CTRLS will always return -EACCES when attempting
to get a control from a request until the request is completed. And in
that case, all controls in the request will have the control value set
(i.e. valid_p_req is true). This means that the whole 'find the most
recent previous request containing a control' idea is pointless, and
the code can be simplified considerably.
The v4l2_g_ext_ctrls_common() function was refactored a bit to make
it more understandable. It also avoids updating volatile controls
in a completed request since that was already done when the request
was completed.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Fixes: 2fae4d6aabc8 ("media: v4l2-ctrls: v4l2_ctrl_request_complete() should always set ref->req") Fixes: 6fa6f831f095 ("media: v4l2-ctrls: add core request support") Cc: <stable@vger.kernel.org> # for v5.9 and up Tested-by: Alexandre Courbot <acourbot@chromium.org> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Do not modify imgu_pipe->nodes[inode].vdev_fmt.fmt.pix_mp, until the
format has been correctly validated.
Otherwise, even if we use a backup variable, there is a period of time
where imgu_pipe->nodes[inode].vdev_fmt.fmt.pix_mp might have an invalid
value that can be used by other functions.
If there in an error during a set_fmt, do not overwrite the previous
sizes with the invalid config.
Without this patch, v4l2-compliance ends up allocating 4GiB of RAM and
causing the following OOPs
[ 38.662975] ipu3-imgu 0000:00:05.0: swiotlb buffer is full (sz: 4096 bytes)
[ 38.662980] DMA: Out of SW-IOMMU space for 4096 bytes at device 0000:00:05.0
[ 38.663010] general protection fault: 0000 [#1] PREEMPT SMP
dvb_usb_device_init() allocates a dvb_usb_device object, but it
doesn't release the object by itself even at errors. The object is
released in the callee side (dvb_usb_init()) in some error cases via
dvb_usb_exit() call, but it also missed the object free in other error
paths. And, the caller (it's only dvb_usb_device_init()) doesn't seem
caring the resource management as well, hence those memories are
leaked.
This patch assures releasing the memory at the error path in
dvb_usb_device_init(). Now dvb_usb_init() frees the resources it
allocated but leaves the passed dvb_usb_device object intact. In
turn, the dvb_usb_device object is released in dvb_usb_device_init()
instead.
We could use dvb_usb_exit() function for releasing everything in the
callee (as it was used for some error cases in the original code), but
releasing the passed object in the callee is non-intuitive and
error-prone. So I took this approach (which is more standard in Linus
kernel code) although it ended with a bit more open codes.
Along with the change, the patch makes sure that USB intfdata is reset
and don't return the bogus pointer to the caller of
dvb_usb_device_init() at the error path, too.
Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
dvb_usb_device_init() copies the properties to the own data, so that
the callers can release the original properties later (as done in the
commit 299c7007e936 ("media: dw2102: Fix memleak on sequence of
probes")). However, it also stores dev->desc pointer that is a
reference to the original properties data. Since dev->desc is
referred later, it may result in use-after-free, in the worst case,
leading to a kernel Oops as reported.
This patch addresses the problem by allocating and copying the
properties at first, then get the desc from the copied properties.
Reported-and-tested-by: Stefan Seyfried <seife+kernel@b1-systems.com> BugLink: http://bugzilla.opensuse.org/show_bug.cgi?id=1181104 Reviewed-by: Robert Foss <robert.foss@linaro.org> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
dvb_media_device_free() is leaking memory. Free `dvbdev->adapter->conn`
before setting it to NULL, as documented in include/media/media-device.h:
"The media_entity instance itself must be freed explicitly by the driver
if required."
Eric has noticed that after pagecache read rework, generic/418 is
occasionally failing for ext4 when blocksize < pagesize. In fact, the
pagecache rework just made hard to hit race in ext4 more likely. The
problem is that since ext4 conversion of direct IO writes to iomap
framework (commit 378f32bab371), we update inode size after direct IO
write only after invalidating page cache. Thus if buffered read sneaks
at unfortunate moment like:
CPU1 - write at offset 1k CPU2 - read from offset 0
iomap_dio_rw(..., IOMAP_DIO_FORCE_WAIT);
ext4_readpage();
ext4_handle_inode_extension()
the read will zero out tail of the page as it still sees smaller inode
size and thus page cache becomes inconsistent with on-disk contents with
all the consequences.
Fix the problem by moving inode size update into end_io handler which
gets called before the page cache is invalidated.
Reported-and-tested-by: Eric Whitney <enwlinux@gmail.com> Fixes: 378f32bab371 ("ext4: introduce direct I/O write using iomap infrastructure") CC: stable@vger.kernel.org Signed-off-by: Jan Kara <jack@suse.cz> Acked-by: Dave Chinner <dchinner@redhat.com> Link: https://lore.kernel.org/r/20210415155417.4734-1-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This is needed to allow generic/607 to pass for file systems with the
inline data_feature enabled, and it allows the use of file systems
where the directories use inline_data, while the files are accessed
via DAX.
Fix As write_mmp_block() so that it returns -EIO instead of 1, so that
the correct error gets saved into the superblock.
Cc: stable@kernel.org Fixes: 54d3adbc29f0 ("ext4: save all error info in save_error_info() and drop ext4_set_errno()") Reported-by: Liu Zhi Qiang <liuzhiqiang26@huawei.com> Signed-off-by: Ye Bin <yebin10@huawei.com> Reviewed-by: Andreas Dilger <adilger@dilger.ca> Link: https://lore.kernel.org/r/20210406025331.148343-1-yebin10@huawei.com Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We should set the error code when ext4_commit_super check argument failed.
Found in code review. Fixes: c4be0c1dc4cdc ("filesystem freeze: add error handling of write_super_lockfs/unlockfs"). Cc: stable@kernel.org Signed-off-by: Fengnan Chang <changfengnan@vivo.com> Reviewed-by: Andreas Dilger <adilger@dilger.ca> Link: https://lore.kernel.org/r/20210402101631.561-1-changfengnan@vivo.com Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When CONFIG_QUOTA is enabled, if we failed to mount the filesystem due
to some error happens behind ext4_orphan_cleanup(), it will end up
triggering a after free issue of super_block. The problem is that
ext4_orphan_cleanup() will set SB_ACTIVE flag if CONFIG_QUOTA is
enabled, after we cleanup the truncated inodes, the last iput() will put
them into the lru list, and these inodes' pages may probably dirty and
will be write back by the writeback thread, so it could be raced by
freeing super_block in the error path of mount_bdev().
After check the setting of SB_ACTIVE flag in ext4_orphan_cleanup(), it
was used to ensure updating the quota file properly, but evict inode and
trash data immediately in the last iput does not affect the quotafile,
so setting the SB_ACTIVE flag seems not required[1]. Fix this issue by
just remove the SB_ACTIVE setting.
Cc: stable@kernel.org Signed-off-by: Zhang Yi <yi.zhang@huawei.com> Tested-by: Jan Kara <jack@suse.cz> Reviewed-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20210331033138.918975-1-yi.zhang@huawei.com Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Commit <50122847007> ("ext4: fix check to prevent initializing reserved
inodes") check the block group zero and prevent initializing reserved
inodes. But in some special cases, the reserved inode may not all belong
to the group zero, it may exist into the second group if we format
filesystem below.
So, it will end up triggering a false positive report of a corrupted
file system. This patch fix it by avoid check reserved inodes if no free
inode blocks will be zeroed.
Cc: stable@kernel.org Fixes: 50122847007 ("ext4: fix check to prevent initializing reserved inodes") Signed-off-by: Zhang Yi <yi.zhang@huawei.com> Suggested-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20210331121516.2243099-1-yi.zhang@huawei.com Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Assertion checks in jbd2_journal_dirty_metadata() are known to be racy
but we don't want to be grabbing locks just for them. We thus recheck
them under b_state_lock only if it looks like they would fail. Annotate
the checks with data_race().
Cc: stable@kernel.org Reported-by: Hao Sun <sunhao.th@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20210406161804.20150-2-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Access to journal->j_running_transaction is not protected by appropriate
lock and thus is racy. We are well aware of that and the code handles
the race properly. Just add a comment and data_race() annotation.
Cc: stable@kernel.org Reported-by: syzbot+30774a6acf6a2cf6d535@syzkaller.appspotmail.com Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20210406161804.20150-1-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If the timestamp of the .config file is updated, config_data.gz is
regenerated, then vmlinux is re-linked. This occurs even if the content
of the .config has not changed at all.
This issue was mitigated by commit 67424f61f813 ("kconfig: do not write
.config if the content is the same"); Kconfig does not update the
.config when it ends up with the identical configuration.
The issue is remaining when the .config is created by *_defconfig with
some config fragment(s) applied on top.
This is typical for powerpc and mips, where several *_defconfig targets
are constructed by using merge_config.sh.
One workaround is to have the copy of the .config. The filechk rule
updates the copy, kernel/config_data, by checking the content instead
of the timestamp.
With this commit, the second run with the same configuration avoids
the needless rebuilds.
$ make ARCH=mips defconfig all
[ snip ]
$ make ARCH=mips defconfig all
*** Default configuration is based on target '32r2el_defconfig'
Using ./arch/mips/configs/generic_defconfig as base
Merging arch/mips/configs/generic/32r2.config
Merging arch/mips/configs/generic/el.config
Merging ./arch/mips/configs/generic/board-boston.config
Merging ./arch/mips/configs/generic/board-ni169445.config
Merging ./arch/mips/configs/generic/board-ocelot.config
Merging ./arch/mips/configs/generic/board-ranchu.config
Merging ./arch/mips/configs/generic/board-sead-3.config
Merging ./arch/mips/configs/generic/board-xilfpga.config
#
# configuration written to .config
#
SYNC include/config/auto.conf
CALL scripts/checksyscalls.sh
CALL scripts/atomic/check-atomics.sh
CHK include/generated/compile.h
CHK include/generated/autoksyms.h
Initialize MSR_TSC_AUX with CPU node information if RDTSCP or RDPID is
supported. This fixes a bug where vdso_read_cpunode() will read garbage
via RDPID if RDPID is supported but RDTSCP is not. While no known CPU
supports RDPID but not RDTSCP, both Intel's SDM and AMD's APM allow for
RDPID to exist without RDTSCP, e.g. it's technically a legal CPU model
for a virtual machine.
Note, technically MSR_TSC_AUX could be initialized if and only if RDPID
is supported since RDTSCP is currently not used to retrieve the CPU node.
But, the cost of the superfluous WRMSR is negigible, whereas leaving
MSR_TSC_AUX uninitialized is just asking for future breakage if someone
decides to utilize RDTSCP.
Fixes: a582c540ac1b ("x86/vdso: Use RDPID in preference to LSL when available") Signed-off-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20210504225632.1532621-2-seanjc@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
FUTEX_LOCK_PI does not require to have the FUTEX_CLOCK_REALTIME bit set
because it has been using CLOCK_REALTIME based absolute timeouts
forever. Due to that, the time namespace adjustment which is applied when
FUTEX_CLOCK_REALTIME is not set, will wrongly take place for FUTEX_LOCK_PI
and wreckage the timeout.
Exclude it from that procedure.
Fixes: c2f7d08cccf4 ("futex: Adjust absolute futex timeouts with per time namespace offset") Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20210422194704.984540159@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The FUTEX_WAIT operand has historically a relative timeout which means that
the clock id is irrelevant as relative timeouts on CLOCK_REALTIME are not
subject to wall clock changes and therefore are mapped by the kernel to
CLOCK_MONOTONIC for simplicity.
If a caller would set FUTEX_CLOCK_REALTIME for FUTEX_WAIT the timeout is
still treated relative vs. CLOCK_MONOTONIC and then the wait arms that
timeout based on CLOCK_REALTIME which is broken and obviously has never
been used or even tested.
Reject any attempt to use FUTEX_CLOCK_REALTIME with FUTEX_WAIT again.
The desired functionality can be achieved with FUTEX_WAIT_BITSET and a
FUTEX_BITSET_MATCH_ANY argument.
Fixes: 337f13046ff0 ("futex: Allow FUTEX_CLOCK_REALTIME with FUTEX_WAIT op") Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20210422194704.834797921@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In the SMB3/SMB3.1.1 negotiate protocol request, we are supposed to
advertise CAP_MULTICHANNEL capability when establishing multiple
channels has been requested by the user doing the mount. See MS-SMB2
sections 2.2.3 and 3.2.5.2
Without setting it there is some risk that multichannel could fail
if the server interpreted the field strictly.
Reviewed-By: Tom Talpey <tom@talpey.com> Reviewed-by: Shyam Prasad N <sprasad@microsoft.com> Cc: <stable@vger.kernel.org> # v5.8+ Signed-off-by: Steve French <stfrench@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
KASAN reports a BUG when download file in jffs2 filesystem.It is
because when dstlen == 1, cpage_out will write array out of bounds.
Actually, data will not be compressed in jffs2_zlib_compress() if
data's length less than 4.
[ 393.799778] BUG: KASAN: slab-out-of-bounds in jffs2_rtime_compress+0x214/0x2f0 at addr ffff800062e3b281
[ 393.809166] Write of size 1 by task tftp/2918
[ 393.813526] CPU: 3 PID: 2918 Comm: tftp Tainted: G B 4.9.115-rt93-EMBSYS-CGEL-6.1.R6-dirty #1
[ 393.823173] Hardware name: LS1043A RDB Board (DT)
[ 393.827870] Call trace:
[ 393.830322] [<ffff20000808c700>] dump_backtrace+0x0/0x2f0
[ 393.835721] [<ffff20000808ca04>] show_stack+0x14/0x20
[ 393.840774] [<ffff2000086ef700>] dump_stack+0x90/0xb0
[ 393.845829] [<ffff20000827b19c>] kasan_object_err+0x24/0x80
[ 393.851402] [<ffff20000827b404>] kasan_report_error+0x1b4/0x4d8
[ 393.857323] [<ffff20000827bae8>] kasan_report+0x38/0x40
[ 393.862548] [<ffff200008279d44>] __asan_store1+0x4c/0x58
[ 393.867859] [<ffff2000084ce2ec>] jffs2_rtime_compress+0x214/0x2f0
[ 393.873955] [<ffff2000084bb3b0>] jffs2_selected_compress+0x178/0x2a0
[ 393.880308] [<ffff2000084bb530>] jffs2_compress+0x58/0x478
[ 393.885796] [<ffff2000084c5b34>] jffs2_write_inode_range+0x13c/0x450
[ 393.892150] [<ffff2000084be0b8>] jffs2_write_end+0x2a8/0x4a0
[ 393.897811] [<ffff2000081f3008>] generic_perform_write+0x1c0/0x280
[ 393.903990] [<ffff2000081f5074>] __generic_file_write_iter+0x1c4/0x228
[ 393.910517] [<ffff2000081f5210>] generic_file_write_iter+0x138/0x288
[ 393.916870] [<ffff20000829ec1c>] __vfs_write+0x1b4/0x238
[ 393.922181] [<ffff20000829ff00>] vfs_write+0xd0/0x238
[ 393.927232] [<ffff2000082a1ba8>] SyS_write+0xa0/0x110
[ 393.932283] [<ffff20000808429c>] __sys_trace_return+0x0/0x4
[ 393.937851] Object at ffff800062e3b280, in cache kmalloc-64 size: 64
[ 393.944197] Allocated:
[ 393.946552] PID = 2918
[ 393.948913] save_stack_trace_tsk+0x0/0x220
[ 393.953096] save_stack_trace+0x18/0x20
[ 393.956932] kasan_kmalloc+0xd8/0x188
[ 393.960594] __kmalloc+0x144/0x238
[ 393.963994] jffs2_selected_compress+0x48/0x2a0
[ 393.968524] jffs2_compress+0x58/0x478
[ 393.972273] jffs2_write_inode_range+0x13c/0x450
[ 393.976889] jffs2_write_end+0x2a8/0x4a0
[ 393.980810] generic_perform_write+0x1c0/0x280
[ 393.985251] __generic_file_write_iter+0x1c4/0x228
[ 393.990040] generic_file_write_iter+0x138/0x288
[ 393.994655] __vfs_write+0x1b4/0x238
[ 393.998228] vfs_write+0xd0/0x238
[ 394.001543] SyS_write+0xa0/0x110
[ 394.004856] __sys_trace_return+0x0/0x4
[ 394.008684] Freed:
[ 394.010691] PID = 2918
[ 394.013051] save_stack_trace_tsk+0x0/0x220
[ 394.017233] save_stack_trace+0x18/0x20
[ 394.021069] kasan_slab_free+0x88/0x188
[ 394.024902] kfree+0x6c/0x1d8
[ 394.027868] jffs2_sum_write_sumnode+0x2c4/0x880
[ 394.032486] jffs2_do_reserve_space+0x198/0x598
[ 394.037016] jffs2_reserve_space+0x3f8/0x4d8
[ 394.041286] jffs2_write_inode_range+0xf0/0x450
[ 394.045816] jffs2_write_end+0x2a8/0x4a0
[ 394.049737] generic_perform_write+0x1c0/0x280
[ 394.054179] __generic_file_write_iter+0x1c4/0x228
[ 394.058968] generic_file_write_iter+0x138/0x288
[ 394.063583] __vfs_write+0x1b4/0x238
[ 394.067157] vfs_write+0xd0/0x238
[ 394.070470] SyS_write+0xa0/0x110
[ 394.073783] __sys_trace_return+0x0/0x4
[ 394.077612] Memory state around the buggy address:
[ 394.082404] ffff800062e3b180: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
[ 394.089623] ffff800062e3b200: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
[ 394.096842] >ffff800062e3b280: 01 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 394.104056] ^
[ 394.107283] ffff800062e3b300: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[ 394.114502] ffff800062e3b380: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[ 394.121718] ==================================================================
Signed-off-by: Yang Yang <yang.yang29@zte.com.cn> Cc: Joel Stanley <joel@jms.id.au> Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
It seems like Fedora 34 ends up enabling a few new gcc warnings, notably
"-Wstringop-overread" and "-Warray-parameter".
Both of them cause what seem to be valid warnings in the kernel, where
we have array size mismatches in function arguments (that are no longer
just silently converted to a pointer to element, but actually checked).
This fixes most of the trivial ones, by making the function declaration
match the function definition, and in the case of intel_pm.c, removing
the over-specified array size from the argument declaration.
At least one 'stringop-overread' warning remains in the i915 driver, but
that one doesn't have the same obvious trivial fix, and may or may not
actually be indicative of a bug.
[ It was a mistake to upgrade one of my machines to Fedora 34 while
being busy with the merge window, but if this is the extent of the
compiler upgrade problems, things are better than usual - Linus ]
gcc-11 introdces a harmless warning for cap_inode_getsecurity:
security/commoncap.c: In function ‘cap_inode_getsecurity’:
security/commoncap.c:440:33: error: ‘memcpy’ reading 16 bytes from a region of size 0 [-Werror=stringop-overread]
440 | memcpy(&nscap->data, &cap->data, sizeof(__le32) * 2 * VFS_CAP_U32);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The problem here is that tmpbuf is initialized to NULL, so gcc assumes
it is not accessible unless it gets set by vfs_getxattr_alloc(). This is
a legitimate warning as far as I can tell, but the code is correct since
it correctly handles the error when that function fails.
Add a separate NULL check to tell gcc about it as well.
Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Christian Brauner <christian.brauner@ubuntu.com> Signed-off-by: James Morris <jamorris@linux.microsoft.com> Cc: Andrey Zhizhikin <andrey.z@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We're starting from a TXQ label, not a TXQ type, so
efx_channel_get_tx_queue() is inappropriate (and could return NULL,
leading to panics).
Fixes: 12804793b17c ("sfc: decouple TXQ type from label") Cc: stable@vger.kernel.org Signed-off-by: Edward Cree <ecree.xilinx@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We're starting from a TXQ instance number ('qid'), not a TXQ type, so
efx_get_tx_queue() is inappropriate (and could return NULL, leading
to panics).
Fixes: 12804793b17c ("sfc: decouple TXQ type from label") Reported-by: Trevor Hemsley <themsley@voiceflex.com> Cc: stable@vger.kernel.org Signed-off-by: Edward Cree <ecree.xilinx@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If mounted with discard option, exFAT issues discard command when clear
cluster bit to remove file. But the input parameter of cluster-to-sector
calculation is abnormally added by reserved cluster size which is 2,
leading to discard unrelated sectors included in target+2 cluster.
With fixing this, remove the wrong comments in set/clear/find bitmap
functions.
There are two modes for write(2) and friends in fuse:
a) write through (update page cache, send sync WRITE request to userspace)
b) buffered write (update page cache, async writeout later)
The write through method kept all the page cache pages locked that were
used for the request. Keeping more than one page locked is deadlock prone
and Qian Cai demonstrated this with trinity fuzzing.
The reason for keeping the pages locked is that concurrent mapped reads
shouldn't try to pull possibly stale data into the page cache.
For full page writes, the easy way to fix this is to make the cached page
be the authoritative source by marking the page PG_uptodate immediately.
After this the page can be safely unlocked, since mapped/cached reads will
take the written data from the cache.
Concurrent mapped writes will now cause data in the original WRITE request
to be updated; this however doesn't cause any data inconsistency and this
scenario should be exceedingly rare anyway.
If the WRITE request returns with an error in the above case, currently the
page is not marked uptodate; this means that a concurrent read will always
read consistent data. After this patch the page is uptodate between
writing to the cache and receiving the error: there's window where a cached
read will read the wrong data. While theoretically this could be a
regression, it is unlikely to be one in practice, since this is normal for
buffered writes.
In case of a partial page write to an already uptodate page the locking is
also unnecessary, with the above caveats.
Partial write of a not uptodate page still needs to be handled. One way
would be to read the complete page before doing the write. This is not
possible, since it might break filesystems that don't expect any READ
requests when the file was opened O_WRONLY.
The other solution is to serialize the synchronous write with reads from
the partial pages. The easiest way to do this is to keep the partial pages
locked. The problem is that a write() may involve two such pages (one head
and one tail). This patch fixes it by only locking the partial tail page.
If there's a partial head page as well, then split that off as a separate
WRITE request.
If fast table reloads occur during an ongoing reshape of raid4/5/6
devices the target may race reading a superblock vs the the MD resync
thread; causing an inconclusive reshape state to be read in its
constructor.
lvm2 test lvconvert-raid-reshape-stripes-load-reload.sh can cause
BUG_ON() to trigger in md_run(), e.g.:
"kernel BUG at drivers/md/raid5.c:7567!".
Scenario triggering the bug:
1. the MD sync thread calls end_reshape() from raid5_sync_request()
when done reshaping. However end_reshape() _only_ updates the
reshape position to MaxSector keeping the changed layout
configuration though (i.e. any delta disks, chunk sector or RAID
algorithm changes). That inconclusive configuration is stored in
the superblock.
2. dm-raid constructs a mapping, loading named inconsistent superblock
as of step 1 before step 3 is able to finish resetting the reshape
state completely, and calls md_run() which leads to mentioned bug
in raid5.c.
3. the MD RAID personality's finish_reshape() is called; which resets
the reshape information on chunk sectors, delta disks, etc. This
explains why the bug is rarely seen on multi-core machines, as MD's
finish_reshape() superblock update races with the dm-raid
constructor's superblock load in step 2.
Fix identifies inconclusive superblock content in the dm-raid
constructor and resets it before calling md_run(), factoring out
identifying checks into rs_is_layout_change() to share in existing
rs_reshape_requested() and new rs_reset_inclonclusive_reshape(). Also
enhance a comment and remove an empty line.
This patch addresses a data corruption bug in raid1 arrays using bitmaps.
Without this fix, the bitmap bits for the failed I/O end up being cleared.
Since we are in the failure leg of raid1_end_write_request, the request
either needs to be retried (R1BIO_WriteError) or failed (R1BIO_Degraded).
Fixes: eeba6809d8d5 ("md/raid1: end bio when the device faulty") Cc: stable@vger.kernel.org # v5.2+ Signed-off-by: Paul Clements <paul.clements@us.sios.com> Signed-off-by: Song Liu <song@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
crypto_stats_get() is a no-op when the kernel is compiled without
CONFIG_CRYPTO_STATS, so pairing it with crypto_alg_put() unconditionally
(as crypto_rng_reset() does) is wrong.
Fix this by moving the call to crypto_stats_get() to just before the
actual algorithm operation which might need it. This makes it always
paired with crypto_stats_rng_seed().
Fixes: eed74b3eba9e ("crypto: rng - Fix a refcounting bug in crypto_rng_reset()") Cc: stable@vger.kernel.org Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Debian's clang carries a patch that makes the default FPU mode
'vfp3-d16' instead of 'neon' for 'armv7-a' to avoid generating NEON
instructions on hardware that does not support them:
Shuffle the order of the '.arch' and '.fpu' directives so that the code
builds regardless of the default FPU mode. This has been tested against
both clang with and without Debian's patch and GCC.
Cc: stable@vger.kernel.org Fixes: d8f1308a025f ("crypto: arm/curve25519 - wire up NEON implementation") Link: https://github.com/ClangBuiltLinux/continuous-integration2/issues/118 Reported-by: Arnd Bergmann <arnd@arndb.de> Suggested-by: Arnd Bergmann <arnd@arndb.de> Suggested-by: Jessica Clarke <jrtc27@jrtc27.com> Signed-off-by: Nathan Chancellor <nathan@kernel.org> Acked-by: Jason A. Donenfeld <Jason@zx2c4.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Avoid allocating memory and reading the host log when a virtual device
is used since this log is of no use to that driver. A virtual
device can be identified through the flag TPM_CHIP_FLAG_VIRTUAL, which
is only set for the tpm_vtpm_proxy driver.
Cc: stable@vger.kernel.org Fixes: 6f99612e2500 ("tpm: Proxy driver for supporting multiple emulated TPMs") Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When tpm_read_log_efi is called multiple times, which happens when
one loads and unloads a TPM2 driver multiple times, then the global
variable efi_tpm_final_log_size will at some point become a negative
number due to the subtraction of final_events_preboot_size occurring
each time. Use a local variable to avoid this integer underflow.
The following issue is now resolved:
Mar 8 15:35:12 hibinst kernel: Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
Mar 8 15:35:12 hibinst kernel: Workqueue: tpm-vtpm vtpm_proxy_work [tpm_vtpm_proxy]
Mar 8 15:35:12 hibinst kernel: RIP: 0010:__memcpy+0x12/0x20
Mar 8 15:35:12 hibinst kernel: Code: 00 b8 01 00 00 00 85 d2 74 0a c7 05 44 7b ef 00 0f 00 00 00 c3 cc cc cc 66 66 90 66 90 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 <f3> 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 f3 a4
Mar 8 15:35:12 hibinst kernel: RSP: 0018:ffff9ac4c0fcfde0 EFLAGS: 00010206
Mar 8 15:35:12 hibinst kernel: RAX: ffff88f878cefed5 RBX: ffff88f878ce9000 RCX: 1ffffffffffffe0f
Mar 8 15:35:12 hibinst kernel: RDX: 0000000000000003 RSI: ffff9ac4c003bff9 RDI: ffff88f878cf0e4d
Mar 8 15:35:12 hibinst kernel: RBP: ffff9ac4c003b000 R08: 0000000000001000 R09: 000000007e9d6073
Mar 8 15:35:12 hibinst kernel: R10: ffff9ac4c003b000 R11: ffff88f879ad3500 R12: 0000000000000ed5
Mar 8 15:35:12 hibinst kernel: R13: ffff88f878ce9760 R14: 0000000000000002 R15: ffff88f77de7f018
Mar 8 15:35:12 hibinst kernel: FS: 0000000000000000(0000) GS:ffff88f87bd00000(0000) knlGS:0000000000000000
Mar 8 15:35:12 hibinst kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Mar 8 15:35:12 hibinst kernel: CR2: ffff9ac4c003c000 CR3: 00000001785a6004 CR4: 0000000000060ee0
Mar 8 15:35:12 hibinst kernel: Call Trace:
Mar 8 15:35:12 hibinst kernel: tpm_read_log_efi+0x152/0x1a7
Mar 8 15:35:12 hibinst kernel: tpm_bios_log_setup+0xc8/0x1c0
Mar 8 15:35:12 hibinst kernel: tpm_chip_register+0x8f/0x260
Mar 8 15:35:12 hibinst kernel: vtpm_proxy_work+0x16/0x60 [tpm_vtpm_proxy]
Mar 8 15:35:12 hibinst kernel: process_one_work+0x1b4/0x370
Mar 8 15:35:12 hibinst kernel: worker_thread+0x53/0x3e0
Mar 8 15:35:12 hibinst kernel: ? process_one_work+0x370/0x370
Cc: stable@vger.kernel.org Fixes: 166a2809d65b ("tpm: Don't duplicate events from the final event log in the TCG2 log") Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
A few archs like powerpc have different errno.h values for macros
EDEADLOCK and EDEADLK. In code including both libc and linux versions of
errno.h, this can result in multiple definitions of EDEADLOCK in the
include chain. Definitions to the same value (e.g. seen with mips) do
not raise warnings, but on powerpc there are redefinitions changing the
value, which raise warnings and errors (if using "-Werror").
Guard against these redefinitions to avoid build errors like the following,
first seen cross-compiling libbpf v5.8.9 for powerpc using GCC 8.4.0 with
musl 1.1.24:
In file included from ../../arch/powerpc/include/uapi/asm/errno.h:5,
from ../../include/linux/err.h:8,
from libbpf.c:29:
../../include/uapi/asm-generic/errno.h:40: error: "EDEADLOCK" redefined [-Werror]
#define EDEADLOCK EDEADLK
In file included from toolchain-powerpc_8540_gcc-8.4.0_musl/include/errno.h:10,
from libbpf.c:26:
toolchain-powerpc_8540_gcc-8.4.0_musl/include/bits/errno.h:58: note: this is the location of the previous definition
#define EDEADLOCK 58
Commit 7c95d8893fb5 ("powerpc: Change calling convention for
create_branch() et. al.") complexified the frame of function
do_feature_fixups(), leading to GCC setting up a stack
guard when CONFIG_STACKPROTECTOR is selected.
The problem is that do_feature_fixups() is called very early
while 'current' in r2 is not set up yet and the code is still
not at the final address used at link time.
So, like other instrumentation, stack protection needs to be
deactivated for feature-fixups.c and code-patching.c
Fixes: 7c95d8893fb5 ("powerpc: Change calling convention for create_branch() et. al.") Cc: stable@vger.kernel.org # v5.8+ Reported-by: Jonathan Neuschaefer <j.neuschaefer@gmx.net> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Tested-by: Jonathan Neuschaefer <j.neuschaefer@gmx.net> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/b688fe82927b330349d9e44553363fa451ea4d95.1619715114.git.christophe.leroy@csgroup.eu Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
kexec_file_load() uses initial_boot_params in setting up the device tree
for the kernel to be loaded. Though initial_boot_params holds info about
CPUs at the time of boot, it doesn't account for hot added CPUs.
So, kexec'ing with kexec_file_load() syscall leaves the kexec'ed kernel
with inaccurate CPU info.
If kdump kernel is loaded with kexec_file_load() syscall and the system
crashes on a hot added CPU, the capture kernel hangs failing to identify
the boot CPU, with no output.
To avoid this from happening, extract current CPU info from of_root
device node and use it for setting up the fdt in kexec_file_load case.
Fixes: 6ecd0163d360 ("powerpc/kexec_file: Add appropriate regions for memory reserve map") Cc: stable@vger.kernel.org # v5.9+ Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com> Reviewed-by: Hari Bathini <hbathini@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210429060256.199714-1-sourabhjain@linux.ibm.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
During the EEH MMIO error checking, the current implementation fails to map
the (virtual) MMIO address back to the pci device on radix with hugepage
mappings for I/O. This results into failure to dispatch EEH event with no
recovery even when EEH capability has been enabled on the device.
In case of hugepage mappings, eeh_token_to_phys() has a bug in virt -> phys
translation that results in wrong physical address, which is then passed to
eeh_addr_cache_get_dev() to match it against cached pci I/O address ranges
to get to a PCI device. Hence, it fails to find a match and the EEH event
never gets dispatched leaving the device in failed state.
The commit 33439620680be ("powerpc/eeh: Handle hugepages in ioremap space")
introduced following logic to translate virt to phys for hugepage mappings:
eeh_token_to_phys():
+ pa = pte_pfn(*ptep);
+
+ /* On radix we can do hugepage mappings for io, so handle that */
+ if (hugepage_shift) {
+ pa <<= hugepage_shift; <= This is wrong
+ pa |= token & ((1ul << hugepage_shift) - 1);
+ }
This patch fixes the virt -> phys translation in eeh_token_to_phys()
function.
$ cat /sys/kernel/debug/powerpc/eeh_address_cache
mem addr range [0x0000040080000000-0x00000400807fffff]: 0030:01:00.1
mem addr range [0x0000040080800000-0x0000040080ffffff]: 0030:01:00.1
mem addr range [0x0000040081000000-0x00000400817fffff]: 0030:01:00.0
mem addr range [0x0000040081800000-0x0000040081ffffff]: 0030:01:00.0
mem addr range [0x0000040082000000-0x000004008207ffff]: 0030:01:00.1
mem addr range [0x0000040082080000-0x00000400820fffff]: 0030:01:00.0
mem addr range [0x0000040082100000-0x000004008210ffff]: 0030:01:00.1
mem addr range [0x0000040082110000-0x000004008211ffff]: 0030:01:00.0
Above is the list of cached io address ranges of pci 0030:01:00.<fn>.
Before this patch:
Tracing 'arg1' of function eeh_addr_cache_get_dev() during error injection
clearly shows that 'addr=' contains wrong physical address:
Starting with ISA v3.1, LPCR[AIL] no longer controls the interrupt
mode for HV=1 interrupts. Instead, a new LPCR[HAIL] bit is defined
which behaves like AIL=3 for HV interrupts when set.
Set HAIL on bare metal to give us mmu-on interrupts and improve
performance.
This also fixes an scv bug: we don't implement scv real mode (AIL=0)
vectors because they are at an inconvenient location, so we just
disable scv support when AIL can not be set. However powernv assumes
that LPCR[AIL] will enable AIL mode so it enables scv support despite
HV interrupts being AIL=0, which causes scv interrupts to go off into
the weeds.
Fixes: 7fa95f9adaee ("powerpc/64s: system call support for scv/rfscv instructions") Cc: stable@vger.kernel.org # v5.9+ Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210402024124.545826-1-npiggin@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
overlayfs using jffs2 as the upper filesystem would fail in some cases
since moving to v5.10. The test case used was to run 'touch' on a file
that exists in the lower fs, causing the modification time to be
updated. It returns EINVAL when the bug is triggered.
A bisection showed this was introduced in v5.9-rc1, with commit 36e2c7421f02 ("fs: don't allow splice read/write without explicit ops").
Reverting that commit restores the expected behaviour.
Some digging showed that this was due to jffs2 lacking an implementation
of splice_write. (For unknown reasons the warn_unsupported that should
trigger was not displaying any output).
Adding this patch resolved the issue and the test now passes.
Cc: stable@vger.kernel.org Fixes: 36e2c7421f02 ("fs: don't allow splice read/write without explicit ops") Signed-off-by: Joel Stanley <joel@jms.id.au> Reviewed-by: Christoph Hellwig <hch@lst.de> Tested-by: Lei YU <yulei.sh@bytedance.com> Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
KASAN report a slab-out-of-bounds problem. The logs are listed below.
It is because in function jffs2_scan_dirent_node, we alloc "checkedlen+1"
bytes for fd->name and we check crc with length rd->nsize. If checkedlen
is less than rd->nsize, it will cause the slab-out-of-bounds problem.
jffs2: Dirent at *** has zeroes in name. Truncating to %d char
==================================================================
BUG: KASAN: slab-out-of-bounds in crc32_le+0x1ce/0x260 at addr ffff8800842cf2d1
Read of size 1 by task test_JFFS2/915
=============================================================================
BUG kmalloc-64 (Tainted: G B O ): kasan: bad access detected
-----------------------------------------------------------------------------
INFO: Allocated in jffs2_alloc_full_dirent+0x2a/0x40 age=0 cpu=1 pid=915
___slab_alloc+0x580/0x5f0
__slab_alloc.isra.24+0x4e/0x64
__kmalloc+0x170/0x300
jffs2_alloc_full_dirent+0x2a/0x40
jffs2_scan_eraseblock+0x1ca4/0x3b64
jffs2_scan_medium+0x285/0xfe0
jffs2_do_mount_fs+0x5fb/0x1bbc
jffs2_do_fill_super+0x245/0x6f0
jffs2_fill_super+0x287/0x2e0
mount_mtd_aux.isra.0+0x9a/0x144
mount_mtd+0x222/0x2f0
jffs2_mount+0x41/0x60
mount_fs+0x63/0x230
vfs_kern_mount.part.6+0x6c/0x1f4
do_mount+0xae8/0x1940
SyS_mount+0x105/0x1d0
INFO: Freed in jffs2_free_full_dirent+0x22/0x40 age=27 cpu=1 pid=915
__slab_free+0x372/0x4e4
kfree+0x1d4/0x20c
jffs2_free_full_dirent+0x22/0x40
jffs2_build_remove_unlinked_inode+0x17a/0x1e4
jffs2_do_mount_fs+0x1646/0x1bbc
jffs2_do_fill_super+0x245/0x6f0
jffs2_fill_super+0x287/0x2e0
mount_mtd_aux.isra.0+0x9a/0x144
mount_mtd+0x222/0x2f0
jffs2_mount+0x41/0x60
mount_fs+0x63/0x230
vfs_kern_mount.part.6+0x6c/0x1f4
do_mount+0xae8/0x1940
SyS_mount+0x105/0x1d0
entry_SYSCALL_64_fastpath+0x1e/0x97
Call Trace:
[<ffffffff815befef>] dump_stack+0x59/0x7e
[<ffffffff812d1d65>] print_trailer+0x125/0x1b0
[<ffffffff812d82c8>] object_err+0x34/0x40
[<ffffffff812dadef>] kasan_report.part.1+0x21f/0x534
[<ffffffff81132401>] ? vprintk+0x2d/0x40
[<ffffffff815f1ee2>] ? crc32_le+0x1ce/0x260
[<ffffffff812db41a>] kasan_report+0x26/0x30
[<ffffffff812d9fc1>] __asan_load1+0x3d/0x50
[<ffffffff815f1ee2>] crc32_le+0x1ce/0x260
[<ffffffff814764ae>] ? jffs2_alloc_full_dirent+0x2a/0x40
[<ffffffff81485cec>] jffs2_scan_eraseblock+0x1d0c/0x3b64
[<ffffffff81488813>] ? jffs2_scan_medium+0xccf/0xfe0
[<ffffffff81483fe0>] ? jffs2_scan_make_ino_cache+0x14c/0x14c
[<ffffffff812da3e9>] ? kasan_unpoison_shadow+0x35/0x50
[<ffffffff812da3e9>] ? kasan_unpoison_shadow+0x35/0x50
[<ffffffff812da462>] ? kasan_kmalloc+0x5e/0x70
[<ffffffff812d5d90>] ? kmem_cache_alloc_trace+0x10c/0x2cc
[<ffffffff818169fb>] ? mtd_point+0xf7/0x130
[<ffffffff81487dc9>] jffs2_scan_medium+0x285/0xfe0
[<ffffffff81487b44>] ? jffs2_scan_eraseblock+0x3b64/0x3b64
[<ffffffff812da3e9>] ? kasan_unpoison_shadow+0x35/0x50
[<ffffffff812da3e9>] ? kasan_unpoison_shadow+0x35/0x50
[<ffffffff812da462>] ? kasan_kmalloc+0x5e/0x70
[<ffffffff812d57df>] ? __kmalloc+0x12b/0x300
[<ffffffff812da462>] ? kasan_kmalloc+0x5e/0x70
[<ffffffff814a2753>] ? jffs2_sum_init+0x9f/0x240
[<ffffffff8148b2ff>] jffs2_do_mount_fs+0x5fb/0x1bbc
[<ffffffff8148ad04>] ? jffs2_del_noinode_dirent+0x640/0x640
[<ffffffff812da462>] ? kasan_kmalloc+0x5e/0x70
[<ffffffff81127c5b>] ? __init_rwsem+0x97/0xac
[<ffffffff81492349>] jffs2_do_fill_super+0x245/0x6f0
[<ffffffff81493c5b>] jffs2_fill_super+0x287/0x2e0
[<ffffffff814939d4>] ? jffs2_parse_options+0x594/0x594
[<ffffffff81819bea>] mount_mtd_aux.isra.0+0x9a/0x144
[<ffffffff81819eb6>] mount_mtd+0x222/0x2f0
[<ffffffff814939d4>] ? jffs2_parse_options+0x594/0x594
[<ffffffff81819c94>] ? mount_mtd_aux.isra.0+0x144/0x144
[<ffffffff81258757>] ? free_pages+0x13/0x1c
[<ffffffff814fa0ac>] ? selinux_sb_copy_data+0x278/0x2e0
[<ffffffff81492b35>] jffs2_mount+0x41/0x60
[<ffffffff81302fb7>] mount_fs+0x63/0x230
[<ffffffff8133755f>] ? alloc_vfsmnt+0x32f/0x3b0
[<ffffffff81337f2c>] vfs_kern_mount.part.6+0x6c/0x1f4
[<ffffffff8133ceec>] do_mount+0xae8/0x1940
[<ffffffff811b94e0>] ? audit_filter_rules.constprop.6+0x1d10/0x1d10
[<ffffffff8133c404>] ? copy_mount_string+0x40/0x40
[<ffffffff812cbf78>] ? alloc_pages_current+0xa4/0x1bc
[<ffffffff81253a89>] ? __get_free_pages+0x25/0x50
[<ffffffff81338993>] ? copy_mount_options.part.17+0x183/0x264
[<ffffffff8133e3a9>] SyS_mount+0x105/0x1d0
[<ffffffff8133e2a4>] ? copy_mnt_ns+0x560/0x560
[<ffffffff810e8391>] ? msa_space_switch_handler+0x13d/0x190
[<ffffffff81be184a>] entry_SYSCALL_64_fastpath+0x1e/0x97
[<ffffffff810e9274>] ? msa_space_switch+0xb0/0xe0
Memory state around the buggy address: ffff8800842cf180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8800842cf200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8800842cf280: fc fc fc fc fc fc 00 00 00 00 01 fc fc fc fc fc
^ ffff8800842cf300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8800842cf380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
This adds the negation needed for proper finger detection on Ilitek
ili2107/ili210x. This fixes polling issues (on Amazon Kindle Fire)
caused by returning false for the cooresponding finger on the touchscreen.
If the pNFS layout segment is marked with the NFS_LSEG_LAYOUTRETURN
flag, then the assumption is that it has some reporting requirement
to perform through a layoutreturn (e.g. flexfiles layout stats or error
information).
Fixes: 6d597e175012 ("pnfs: only tear down lsegs that precede seqid in LAYOUTRETURN args") Cc: stable@vger.kernel.org Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If the pNFS layout segment is marked with the NFS_LSEG_LAYOUTRETURN
flag, then the assumption is that it has some reporting requirement
to perform through a layoutreturn (e.g. flexfiles layout stats or error
information).
Fixes: e0b7d420f72a ("pNFS: Don't discard layout segments that are marked for return") Cc: stable@vger.kernel.org Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix shift out-of-bounds in xprt_calc_majortimeo(). This is caused
by a garbage timeout (retrans) mount option being passed to nfs mount,
in this case from syzkaller.
If the protocol is XPRT_TRANSPORT_UDP, then 'retrans' is a shift
value for a 64-bit long integer, so 'retrans' cannot be >= 64.
If it is >= 64, fail the mount and return an error.
Fixes: 9954bf92c0cd ("NFS: Move mount parameterisation bits into their own file") Reported-by: syzbot+ba2e91df8f74809417fa@syzkaller.appspotmail.com Reported-by: syzbot+f3a0fa110fd630ab56c8@syzkaller.appspotmail.com Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Trond Myklebust <trond.myklebust@hammerspace.com> Cc: Anna Schumaker <anna.schumaker@netapp.com> Cc: linux-nfs@vger.kernel.org Cc: David Howells <dhowells@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: stable@vger.kernel.org Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When failing the driver probe because of invalid firmware properties,
the GTDT driver unmaps the interrupt that it mapped earlier.
However, it never checks whether the mapping of the interrupt actially
succeeded. Even more, should the firmware report an illegal interrupt
number that overlaps with the GIC SGI range, this can result in an
IPI being unmapped, and subsequent fireworks (as reported by Dann
Frazier).
Rework the driver to have a slightly saner behaviour and actually
check whether the interrupt has been mapped before unmapping things.
Reported-by: dann frazier <dann.frazier@canonical.com> Fixes: ca9ae5ec4ef0 ("acpi/arm64: Add SBSA Generic Watchdog support in GTDT driver") Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/YH87dtTfwYgavusz@xps13.dannf Cc: <stable@vger.kernel.org> Cc: Fu Wei <wefu@redhat.com> Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> Tested-by: dann frazier <dann.frazier@canonical.com> Tested-by: Hanjun Guo <guohanjun@huawei.com> Reviewed-by: Hanjun Guo <guohanjun@huawei.com> Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Link: https://lore.kernel.org/r/20210421164317.1718831-2-maz@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
the pointer to struct dst_entry is used as pointer to struct rtable: this
turns the access to struct members like rt_mtu_locked into an OOB read in
the stack. Fix this changing the temporary variable used for IPv4 packets
in ovs_fragment(), similarly to what is done for IPv6 few lines below.
Fixes: d52e5a7e7ca4 ("ipv4: lock mtu in fnhe when received PMTU < net.ipv4.route.min_pmt") Cc: <stable@vger.kernel.org> Acked-by: Eelco Chaudron <echaudro@redhat.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Each multicast route that is forwarding packets (as opposed to trapping
them) points to a list of egress router interfaces (RIFs) through which
packets are replicated.
A route's action can transition from trap to forward when a RIF is
created for one of the route's egress virtual interfaces (eVIF). When
this happens, the route's action is first updated and only later the
list of egress RIFs is committed to the device.
This results in the route pointing to an invalid list. In case the list
pointer is out of range (due to uninitialized memory), the device will
complain:
Fix this by first committing the list of egress RIFs to the device and
only later update the route's action.
Note that a fix is not needed in the reverse function (i.e.,
mlxsw_sp_mr_route_evif_unresolve()), as there the route's action is
first updated and only later the RIF is removed from the list.
Cc: stable@vger.kernel.org Fixes: c011ec1bbfd6 ("mlxsw: spectrum: Add the multicast routing offloading logic") Signed-off-by: Ido Schimmel <idosch@nvidia.com> Reviewed-by: Petr Machata <petrm@nvidia.com> Link: https://lore.kernel.org/r/20210506072308.3834303-1-idosch@idosch.org Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The root cause is, if nat entry in checkpoint journal area is corrupted,
e.g. nid of journalled nat entry exceeds max nid value, during checkpoint,
once it tries to flush nat journal to NAT area, get_next_nat_page() may
access out-of-bounds memory on nat_bitmap due to it uses wrong nid value
as bitmap offset.
f2fs didn't properly clean up if verity failed to be enabled on a file:
- It left verity metadata (pages past EOF) in the page cache, which
would be exposed to userspace if the file was later extended.
- It didn't truncate the verity metadata at all (either from cache or
from disk) if an error occurred while setting the verity bit.
Fix these bugs by adding a call to truncate_inode_pages() and ensuring
that we truncate the verity metadata (both from cache and from disk) in
all error paths. Also rework the code to cleanly separate the success
path from the error paths, which makes it much easier to understand.
Finally, log a message if f2fs_truncate() fails, since it might
otherwise fail silently.
Reported-by: Yunlei He <heyunlei@hihonor.com> Fixes: 95ae251fe828 ("f2fs: add fs-verity support") Cc: <stable@vger.kernel.org> # v5.4+ Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Conside the following case, it just write a big file into flash,
when complete writing, delete the file, and then power off promptly.
Next time power on, we'll get a replay list like:
...
LEB 1105:211344 len 4144 deletion 0 sqnum 428783 key type 1 inode 80
LEB 15:233544 len 160 deletion 1 sqnum 428785 key type 0 inode 80
LEB 1105:215488 len 4144 deletion 0 sqnum 428787 key type 1 inode 80
...
In the replay list, data nodes' deletion are 0, and the inode node's
deletion is 1. In current logic, the file's dentry will be removed,
but inode and the flash space it occupied will be reserved.
User will see that much free space been disappeared.
We only need to check the deletion value of the following inode type
node of the replay entry.
Fixes: e58725d51fa8 ("ubifs: Handle re-linking of inodes correctly while recovery") Cc: stable@vger.kernel.org Signed-off-by: Guochun Mao <guochun.mao@mediatek.com> Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Commit 56348560d495 ("debugfs: do not attempt to create a new file
before the filesystem is initalized") forbids creating new debugfs files
until debugfs is fully initialized. This means that KCSAN's debugfs
file creation, which happened at the end of __init(), no longer works.
And was apparently never supposed to work!
However, there is no reason to create KCSAN's debugfs file so early.
This commit therefore moves its creation to a late_initcall() callback.
Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: stable <stable@vger.kernel.org> Fixes: 56348560d495 ("debugfs: do not attempt to create a new file before the filesystem is initalized") Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Marco Elver <elver@google.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When accidentally passing twice the same tag to qemu, kmemleak ended up
reporting a memory leak in virtiofs. Also, looking at the log I saw the
following error (that's when I realised the duplicated tag):
statx(2) notes that any attribute that is not indicated as supported
by stx_attributes_mask has no usable value. Commits 801e523796004
("fs: move generic stat response attr handling to vfs_getattr_nosec")
and 712b2698e4c02 ("fs/stat: Define DAX statx attribute") sets
STATX_ATTR_AUTOMOUNT and STATX_ATTR_DAX, respectively, without setting
stx_attributes_mask, which can cause xfstests generic/532 to fail.
Fix this in the same way as commit 1b9598c8fb99 ("xfs: fix reporting
supported extra file attributes for statx()")
Currently, -Wunused-but-set-variable is only supported by GCC so it is
disabled unconditionally in a GCC only block (it is enabled with W=1).
clang currently has its implementation for this warning in review so
preemptively move this statement out of the GCC only block and wrap it
with cc-disable-warning so that both compilers function the same.
The arm64 assembler in binutils 2.32 and above generates a program
property note in a note section, .note.gnu.property, to encode used x86
ISAs and features. But the kernel linker script only contains a single
NOTE segment:
Commit dbcc7d57bffc0c ("btrfs: fix race when cloning extent buffer during
rewind of an old root"), fixed a race when we need to rewind the extent
buffer of an old root. It was caused by picking a new mod log operation
for the extent buffer while getting a cloned extent buffer with an outdated
number of items (off by -1), because we cloned the extent buffer without
locking it first.
However there is still another similar race, but in the opposite direction.
The cloned extent buffer has a number of items that does not match the
number of tree mod log operations that are going to be replayed. This is
because right after we got the last (most recent) tree mod log operation to
replay and before locking and cloning the extent buffer, another task adds
a new pointer to the extent buffer, which results in adding a new tree mod
log operation and incrementing the number of items in the extent buffer.
So after cloning we have mismatch between the number of items in the extent
buffer and the number of mod log operations we are going to apply to it.
This results in hitting a BUG_ON() that produces the following stack trace:
(gdb) l *(tree_mod_log_rewind+0x3b1)
0xffffffff819e5b21 is in tree_mod_log_rewind (fs/btrfs/tree-mod-log.c:675).
670 * the modification. As we're going backwards, we do the
671 * opposite of each operation here.
672 */
673 switch (tm->op) {
674 case BTRFS_MOD_LOG_KEY_REMOVE_WHILE_FREEING:
675 BUG_ON(tm->slot < n);
676 fallthrough;
677 case BTRFS_MOD_LOG_KEY_REMOVE_WHILE_MOVING:
678 case BTRFS_MOD_LOG_KEY_REMOVE:
679 btrfs_set_node_key(eb, &tm->key, tm->slot);
(gdb) quit
The following steps explain in more detail how it happens:
1) We have one tree mod log user (through fiemap or the logical ino ioctl),
with a sequence number of 1, so we have fs_info->tree_mod_seq == 1.
This is task A;
2) Another task is at ctree.c:balance_level() and we have eb X currently as
the root of the tree, and we promote its single child, eb Y, as the new
root.
Then, at ctree.c:balance_level(), we call:
ret = btrfs_tree_mod_log_insert_root(root->node, child, true);
3) At btrfs_tree_mod_log_insert_root() we create a tree mod log operation
of type BTRFS_MOD_LOG_KEY_REMOVE_WHILE_FREEING, with a ->logical field
pointing to ebX->start. We only have one item in eb X, so we create
only one tree mod log operation, and store in the "tm_list" array;
4) Then, still at btrfs_tree_mod_log_insert_root(), we create a tree mod
log element of operation type BTRFS_MOD_LOG_ROOT_REPLACE, ->logical set
to ebY->start, ->old_root.logical set to ebX->start, ->old_root.level
set to the level of eb X and ->generation set to the generation of eb X;
5) Then btrfs_tree_mod_log_insert_root() calls tree_mod_log_free_eb() with
"tm_list" as argument. After that, tree_mod_log_free_eb() calls
tree_mod_log_insert(). This inserts the mod log operation of type
BTRFS_MOD_LOG_KEY_REMOVE_WHILE_FREEING from step 3 into the rbtree
with a sequence number of 2 (and fs_info->tree_mod_seq set to 2);
6) Then, after inserting the "tm_list" single element into the tree mod
log rbtree, the BTRFS_MOD_LOG_ROOT_REPLACE element is inserted, which
gets the sequence number 3 (and fs_info->tree_mod_seq set to 3);
7) Back to ctree.c:balance_level(), we free eb X by calling
btrfs_free_tree_block() on it. Because eb X was created in the current
transaction, has no other references and writeback did not happen for
it, we add it back to the free space cache/tree;
8) Later some other task B allocates the metadata extent from eb X, since
it is marked as free space in the space cache/tree, and uses it as a
node for some other btree;
9) The tree mod log user task calls btrfs_search_old_slot(), which calls
btrfs_get_old_root(), and finally that calls tree_mod_log_oldest_root()
with time_seq == 1 and eb_root == eb Y;
10) The first iteration of the while loop finds the tree mod log element
with sequence number 3, for the logical address of eb Y and of type
BTRFS_MOD_LOG_ROOT_REPLACE;
11) Because the operation type is BTRFS_MOD_LOG_ROOT_REPLACE, we don't
break out of the loop, and set root_logical to point to
tm->old_root.logical, which corresponds to the logical address of
eb X;
12) On the next iteration of the while loop, the call to
tree_mod_log_search_oldest() returns the smallest tree mod log element
for the logical address of eb X, which has a sequence number of 2, an
operation type of BTRFS_MOD_LOG_KEY_REMOVE_WHILE_FREEING and
corresponds to the old slot 0 of eb X (eb X had only 1 item in it
before being freed at step 7);
13) We then break out of the while loop and return the tree mod log
operation of type BTRFS_MOD_LOG_ROOT_REPLACE (eb Y), and not the one
for slot 0 of eb X, to btrfs_get_old_root();
14) At btrfs_get_old_root(), we process the BTRFS_MOD_LOG_ROOT_REPLACE
operation and set "logical" to the logical address of eb X, which was
the old root. We then call tree_mod_log_search() passing it the logical
address of eb X and time_seq == 1;
15) But before calling tree_mod_log_search(), task B locks eb X, adds a
key to eb X, which results in adding a tree mod log operation of type
BTRFS_MOD_LOG_KEY_ADD, with a sequence number of 4, to the tree mod
log, and increments the number of items in eb X from 0 to 1.
Now fs_info->tree_mod_seq has a value of 4;
16) Task A then calls tree_mod_log_search(), which returns the most recent
tree mod log operation for eb X, which is the one just added by task B
at the previous step, with a sequence number of 4, a type of
BTRFS_MOD_LOG_KEY_ADD and for slot 0;
17) Before task A locks and clones eb X, task A adds another key to eb X,
which results in adding a new BTRFS_MOD_LOG_KEY_ADD mod log operation,
with a sequence number of 5, for slot 1 of eb X, increments the
number of items in eb X from 1 to 2, and unlocks eb X.
Now fs_info->tree_mod_seq has a value of 5;
18) Task A then locks eb X and clones it. The clone has a value of 2 for
the number of items and the pointer "tm" points to the tree mod log
operation with sequence number 4, not the most recent one with a
sequence number of 5, so there is mismatch between the number of
mod log operations that are going to be applied to the cloned version
of eb X and the number of items in the clone;
19) Task A then calls tree_mod_log_rewind() with the clone of eb X, the
tree mod log operation with sequence number 4 and a type of
BTRFS_MOD_LOG_KEY_ADD, and time_seq == 1;
20) At tree_mod_log_rewind(), we set the local variable "n" with a value
of 2, which is the number of items in the clone of eb X.
Then in the first iteration of the while loop, we process the mod log
operation with sequence number 4, which is targeted at slot 0 and has
a type of BTRFS_MOD_LOG_KEY_ADD. This results in decrementing "n" from
2 to 1.
Then we pick the next tree mod log operation for eb X, which is the
tree mod log operation with a sequence number of 2, a type of
BTRFS_MOD_LOG_KEY_REMOVE_WHILE_FREEING and for slot 0, it is the one
added in step 5 to the tree mod log tree.
We go back to the top of the loop to process this mod log operation,
and because its slot is 0 and "n" has a value of 1, we hit the BUG_ON:
Fix this by checking for a more recent tree mod log operation after locking
and cloning the extent buffer of the old root node, and use it as the first
operation to apply to the cloned extent buffer when rewinding it.
Stable backport notes: due to moved code and renames, in =< 5.11 the
change should be applied to ctree.c:get_old_root.
Reported-by: Zygo Blaxell <ce3g8jdj@umail.furryterror.org> Link: https://lore.kernel.org/linux-btrfs/20210404040732.GZ32440@hungrycats.org/ Fixes: 834328a8493079 ("Btrfs: tree mod log's old roots could still be part of the tree") CC: stable@vger.kernel.org # 4.4+ Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
It was reported that on Zen+ system turbostat started exiting,
which was tracked down to the MSR_PKG_ENERGY_STAT read failing because
offset_to_idx wasn't returning a non-negative index.
This patch combined the modification from Bingsong Si and
Bas Nieuwenhuizen and addd the MSR to the index system as alternative for
MSR_PKG_ENERGY_STATUS.
Fixes: 9972d5d84d76 ("tools/power turbostat: Enable accumulate RAPL display") Reported-by: youling257 <youling257@gmail.com> Tested-by: youling257 <youling257@gmail.com> Tested-by: Kurt Garloff <kurt@garloff.de> Tested-by: Bingsong Si <owen.si@ucloud.cn> Tested-by: Artem S. Tashkinov <aros@gmx.com> Co-developed-by: Bingsong Si <owen.si@ucloud.cn> Co-developed-by: Terry Bowman <terry.bowman@amd.com> Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl> Reviewed-by: Chen Yu <yu.c.chen@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> Cc: Salvatore Bonaccorso <carnil@debian.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This applies a SND_PCI_QUIRK(...) to the Clevo PCx0Dx barebones. This
fix enables audio output over the headset jack and ensures that a
microphone connected via the headset combo jack is correctly recognized
when pluged in.
[ Rearranged the list entries in a sorted order -- tiwai ]
Remove a duplicate vendor+subvendor pin fixup entry as one is masking
the other and making it unreachable. Consider the more specific newcomer
as a second chance instead.
The generic entry is made less strict to also match for laptops with
slightly different 0x12 pin configuration. Tested on Lenovo Yoga 6 (AMD)
where 0x12 is 0x40000000.
Fixes: 607184cb1635 ("ALSA: hda/realtek - Add supported for more Lenovo ALC285 Headset Button") Signed-off-by: Sami Loone <sami@loone.fi> Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/YIXS+GT/dGI/LtK6@yoga Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix two bugs with the Intel HDA Realtek ALC233 sound codec
present in Intel NUC NUC8i7BEH and probably a few other similar
NUC models.
These codecs advertise a 4-level microphone input boost amplifier on
pin 0x19, but the highest two boost settings do not work correctly,
and produce only low analog noise that does not seem to contain any
discernible signal. There is an existing fixup for this exact problem
but for a different PCI subsystem ID, so we re-use that logic.
Changing the boost level also triggers a DC spike in the input signal
that bleeds off over about a second and overwhelms any input during
that time. Thankfully, the existing fixup has the side effect of
making the boost control show up in userspace as a mute/unmute switch,
and this keeps (e.g.) PulseAudio from fiddling with it during normal
input volume adjustments.
Finally, the NUC hardware has built-in inverted stereo mics. This
patch also enables the usual fixup for this so the two channels cancel
noise instead of the actual signal.
The GA503 has almost exactly the same default setup as the GA401
model with the same issues. The GA401 quirks solve all the issues
so we will use the full quirk chain.
The HP ProBook 445 G7 (17T32ES) uses ALC236. Like ALC236_FIXUP_HP_GPIO_LED,
COEF index 0x34 bit 5 is used to control the playback mute LED, but the
microphone mute LED is controlled using pin VREF instead of a COEF index.
The decibel volume range contains a negative maximum value resulting in
pipewire complaining about the device and effectivly having no sound
output. The wrong values also resulted in the headset sounding muted
already at a mixer level of about ~25%.
In the current code, we have some assumption that the audio clock
selector has been set up implicitly and don't want to touch it unless
it's really needed for the fallback autoclock setup. This works for
most devices but some seem having a problem. Partially this was
covered for the devices with a single connector at the initialization
phase (commit 086b957cc17f "ALSA: usb-audio: Skip the clock selector
inquiry for single connections"), but also there are cases where the
wrong clock set up is kept silently. The latter seems to be the cause
of the noises on Behringer devices.
In this patch, we explicitly set up the audio clock selector whenever
the appropriate node is found.
In snd_sb_qsound_build, snd_ctl_add(..,p->qsound_switch...) and
snd_ctl_add(..,p->qsound_space..) are called. But the second
arguments of snd_ctl_add() could be freed via snd_ctl_add_replace()
->snd_ctl_free_one(). After the error code is returned,
snd_sb_qsound_destroy(p) is called in __error branch.
But in snd_sb_qsound_destroy(), the freed p->qsound_switch and
p->qsound_space are still used by snd_ctl_remove().
My patch set p->qsound_switch and p->qsound_space to NULL if
snd_ctl_add() failed to avoid the uaf bugs. But these codes need
to further be improved with the code style.
Just re-order the cx5066_fixups[] entries for HP devices for avoiding
the oversight of the duplicated or unapplied item in future.
No functional changes.
Also Cc-to-stable for the further patch applications.
In snd_emu8000_create_mixer, the callee snd_ctl_add(..,emu->controls[i])
calls snd_ctl_add_replace(.., kcontrol,..). Inside snd_ctl_add_replace(),
if error happens, kcontrol will be freed by snd_ctl_free_one(kcontrol).
Then emu->controls[i] points to a freed memory, and the execution comes
to __error branch of snd_emu8000_create_mixer. The freed emu->controls[i]
is used in snd_ctl_remove(card, emu->controls[i]).
My patch set emu->controls[i] to NULL if snd_ctl_add() failed to avoid
the uaf.
Fix invalid usage of a list_for_each_entry in cpcap_battery_irq_thread().
Empty list or fully traversed list points to list head, which is not
NULL (and before the first element containing real data).
Signed-off-by: Guangqing Zhu <zhuguangqing83@gmail.com> Reviewed-by: Tony Lindgren <tony@atomide.com> Reviewed-by: Carl Philipp Klemm <philipp@uvos.xyz> Tested-by: Carl Philipp Klemm <philipp@uvos.xyz> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
psi_group_cpu->tasks, represented by the unsigned int, stores the
number of tasks that could be stalled on a psi resource(io/mem/cpu).
Decrementing these counters at zero leads to wrapping which further
leads to the psi_group_cpu->state_mask is being set with the
respective pressure state. This could result into the unnecessary time
sampling for the pressure state thus cause the spurious psi events.
This can further lead to wrong actions being taken at the user land
based on these psi events.
Though psi_bug is set under these conditions but that just for debug
purpose. Fix it by decrementing the ->tasks count only when it is
non-zero.
A review of the code showed, that this function which is exposed
within the whole kernel should do a parameter check for the
amount of bytes requested. If this requested bytes is too high
an unsigned int overflow could happen causing this function to
try to memcpy a really big memory chunk.
This is not a security issue as there are only two invocations
of this function from arch/s390/include/asm/archrandom.h and both
are not exposed to userland.
Reported-by: Sven Schnelle <svens@linux.ibm.com> Signed-off-by: Harald Freudenberger <freude@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
The current sched_slice() seems to have issues; there's two possible
things that could be improved:
- the 'nr_running' used for __sched_period() is daft when cgroups are
considered. Using the RQ wide h_nr_running seems like a much more
consistent number.
- (esp) cgroups can slice it real fine, which makes for easy
over-scheduling, ensure min_gran is what the name says.
Make perf_event_exit_event() more robust, such that we can use it from
other contexts. Specifically the up and coming remove_on_exec.
For this to work we need to address a few issues. Remove_on_exec will
not destroy the entire context, so we cannot rely on TASK_TOMBSTONE to
disable event_function_call() and we thus have to use
perf_remove_from_context().
When using perf_remove_from_context(), there's two races to consider.
The first is against close(), where we can have concurrent tear-down
of the event. The second is against child_list iteration, which should
not find a half baked event.
To address this, teach perf_remove_from_context() to special case
!ctx->is_active and about DETACH_CHILD.
[ elver@google.com: fix racing parent/child exit in sync_child_event(). ] Signed-off-by: Marco Elver <elver@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20210408103605.1676875-2-elver@google.com Signed-off-by: Sasha Levin <sashal@kernel.org>
Since the 'mfs' member has been declared as 'u32' in include/scsi/libfc.h,
use the %u format specifier instead of %hu. This patch fixes the following
clang compiler warning:
warning: format specifies type
'unsigned short' but the argument has type 'u32' (aka 'unsigned int')
[-Wformat]
"lport->mfs:%hu\n", mfs, lport->mfs);
~~~ ^~~~~~~~~~
%u
Link: https://lore.kernel.org/r/20210415220826.29438-8-bvanassche@acm.org Cc: Hannes Reinecke <hare@suse.de> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
pm_runtime_get_sync() will increase the rumtime PM counter
even it returns an error. Thus a pairing decrement is needed
to prevent refcount leak. Fix this by replacing this API with
pm_runtime_resume_and_get(), which will not change the runtime
PM counter on error.
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn> Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org>