linux-kernel - Re: [syzbot] [sound?] possible deadlock in snd_pcm_period

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Date: Fri, 15 Mar 2024 06:07:04 -0700
From: syzbot <syzbot+28c1a5a5b041a754b947@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, linux-sound@...r.kernel.org, perex@...ex.cz, 
	syzkaller-bugs@...glegroups.com, tiwai@...e.com, tiwai@...e.de
Subject: Re: [syzbot] [sound?] possible deadlock in snd_pcm_period_elapsed (4)

syzbot has bisected this issue to:

commit beb45974dd49068b24788bbfc2abe20d50503761
Author: Takashi Iwai <tiwai@...e.de>
Date:   Tue Feb 27 08:52:45 2024 +0000

    ALSA: timer: Use guard() for locking

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=148a87b9180000
start commit:   fe46a7dd189e Merge tag 'sound-6.9-rc1' of git://git.kernel..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=168a87b9180000
console output: https://syzkaller.appspot.com/x/log.txt?x=128a87b9180000
kernel config:  https://syzkaller.appspot.com/x/.config?x=4d90a36f0cab495a
dashboard link: https://syzkaller.appspot.com/bug?extid=28c1a5a5b041a754b947
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14835185180000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1132fbfa180000

Reported-by: syzbot+28c1a5a5b041a754b947@...kaller.appspotmail.com
Fixes: beb45974dd49 ("ALSA: timer: Use guard() for locking")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection