linux-kernel - Re: [syzbot] [fs?] WARNING: bad unlock balance in query_matching

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Message-ID: <687628be.a00a0220.3af5df.0002.GAE@google.com>
Date: Tue, 15 Jul 2025 03:09:02 -0700
From: syzbot <syzbot+d4316c39e84f412115c9@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, andrii@...nel.org, david@...hat.com, 
	hdanton@...a.com, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
	lorenzo.stoakes@...cle.com, surenb@...gle.com, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [fs?] WARNING: bad unlock balance in query_matching_vma

syzbot has bisected this issue to:

commit fb8a9ee1f05345b1fae37902d32d954d2150437b
Author: Suren Baghdasaryan <surenb@...gle.com>
Date:   Fri Jul 4 06:07:26 2025 +0000

    fs/proc/task_mmu: execute PROCMAP_QUERY ioctl under per-vma locks

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=171c27d4580000
start commit:   a62b7a37e6fc Add linux-next specific files for 20250711
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=149c27d4580000
console output: https://syzkaller.appspot.com/x/log.txt?x=109c27d4580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=bb4e3ec360fcbd0f
dashboard link: https://syzkaller.appspot.com/bug?extid=d4316c39e84f412115c9
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14ad50f0580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1173018c580000

Reported-by: syzbot+d4316c39e84f412115c9@...kaller.appspotmail.com
Fixes: fb8a9ee1f053 ("fs/proc/task_mmu: execute PROCMAP_QUERY ioctl under per-vma locks")

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