]> git.baikalelectronics.ru Git - kernel.git/commit
ALSA: pcm: Check PCM state at xfern compat ioctl
authorTakashi Iwai <tiwai@suse.de>
Wed, 2 May 2018 06:48:46 +0000 (08:48 +0200)
committerTakashi Iwai <tiwai@suse.de>
Wed, 2 May 2018 06:54:54 +0000 (08:54 +0200)
commit7d10b8c1e3c729ef37a1489c66d868f28b76be91
tree49af8f700b6e882ca19c01abd1c334ec2b9f7a13
parentda57a6cfc80bae53ab69f2e11094ef0d28d106a3
ALSA: pcm: Check PCM state at xfern compat ioctl

Since snd_pcm_ioctl_xfern_compat() has no PCM state check, it may go
further and hit the sanity check pcm_sanity_check() when the ioctl is
called right after open.  It may eventually spew a kernel warning, as
triggered by syzbot, depending on kconfig.

The lack of PCM state check there was just an oversight.  Although
it's no real crash, the spurious kernel warning is annoying, so let's
add the proper check.

Reported-by: syzbot+1dac3a4f6bc9c1c675d4@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/core/pcm_compat.c