]> git.itanic.dy.fi Git - linux-stable/commit
nfc: nci: assert requested protocol is valid
authorJeremy Cline <jeremy@jcline.org>
Mon, 9 Oct 2023 20:00:54 +0000 (16:00 -0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 25 Oct 2023 09:13:30 +0000 (11:13 +0200)
commit2c231a247a1d1628e41fa1eefd1a5307c41c5f53
tree4e674e0e9764362583a5015c55021eecda669283
parent209971d45e9b55a8c674f73fa4f781fb6be76e44
nfc: nci: assert requested protocol is valid

[ Upstream commit 354a6e707e29cb0c007176ee5b8db8be7bd2dee0 ]

The protocol is used in a bit mask to determine if the protocol is
supported. Assert the provided protocol is less than the maximum
defined so it doesn't potentially perform a shift-out-of-bounds and
provide a clearer error for undefined protocols vs unsupported ones.

Fixes: 6a2968aaf50c ("NFC: basic NCI protocol implementation")
Reported-and-tested-by: syzbot+0839b78e119aae1fec78@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=0839b78e119aae1fec78
Signed-off-by: Jeremy Cline <jeremy@jcline.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20231009200054.82557-1-jeremy@jcline.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
net/nfc/nci/core.c