]> git.itanic.dy.fi Git - linux-stable/commit
netfilter: nf_conntrack_h323: lost .data_len definition for Q.931/ipv6
authorVasily Averin <vvs@virtuozzo.com>
Tue, 9 Jun 2020 07:53:22 +0000 (10:53 +0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 9 Jul 2020 07:35:09 +0000 (09:35 +0200)
commit555fb3091f3ad6252a96cecb838ecf55e2960fd9
tree9a65f8353b947909df82b71b62da886a8f78593d
parent7d04fcf7d3c7028a1f6e4f6837d109a03e31405c
netfilter: nf_conntrack_h323: lost .data_len definition for Q.931/ipv6

Could you please push this patch into stable@?
it fixes memory corruption in kernels  v3.5 .. v4.10

Lost .data_len definition leads to write beyond end of
struct nf_ct_h323_master. Usually it corrupts following
struct nf_conn_nat, however if nat is not loaded it corrupts
following slab object.

In mainline this problem went away in v4.11,
after commit 9f0f3ebeda47 ("netfilter: helpers: remove data_len usage
for inkernel helpers") however many stable kernels are still affected.

Fixes: 1afc56794e03 ("netfilter: nf_ct_helper: implement variable length helper private data") # v3.5
cc: stable@vger.kernel.org
Reviewed-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
net/netfilter/nf_conntrack_h323_main.c