ALSA: pcm: Abort properly at pending signal in OSS read/write loops

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The loops for read and write in PCM OSS emulation have no proper check
of pending signals, and they keep processing even after user tries to
break.  This results in a very long delay, often seen as RCU stall
when a huge unprocessed bytes remain queued.  The bug could be easily
triggered by syzkaller.

As a simple workaround, this patch adds the proper check of pending
signals and aborts the loop appropriately.

Reported-by: syzbot+993cb4cfcbbff3947c21@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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This commit is contained in:

Takashi Iwai 2018-01-08 13:58:31 +01:00

parent 898dfe4687

commit 29159a4ed7

1 changed files with 8 additions and 0 deletions

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8

sound/core/oss/pcm_oss.c

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