linux-kernel - Re: [syzbot] [btrfs?] kernel BUG in __folio_start

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Message-ID: <6791ce39.050a0220.194594.0020.GAE@google.com>
Date: Wed, 22 Jan 2025 21:06:01 -0800
From: syzbot <syzbot+aac7bff85be224de5156@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, clm@...com, dsterba@...e.com, 
	fdmanana@...nel.org, josef@...icpanda.com, linux-btrfs@...r.kernel.org, 
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-mm@...ck.org, nogikh@...gle.com, peterz@...radead.org, 
	quwenruo.btrfs@....com, syzkaller-bugs@...glegroups.com, willy@...radead.org, 
	wqu@...e.com
Subject: Re: [syzbot] [btrfs?] kernel BUG in __folio_start_writeback

syzbot suspects this issue was fixed by commit:

commit 66951e4860d3c688bfa550ea4a19635b57e00eca
Author: Peter Zijlstra <peterz@...radead.org>
Date:   Mon Jan 13 12:50:11 2025 +0000

    sched/fair: Fix update_cfs_group() vs DELAY_DEQUEUE

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=11c129f8580000
start commit:   228a1157fb9f Merge tag '6.13-rc-part1-SMB3-client-fixes' o..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=402159daa216c89d
dashboard link: https://syzkaller.appspot.com/bug?extid=aac7bff85be224de5156
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13840778580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17840778580000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: sched/fair: Fix update_cfs_group() vs DELAY_DEQUEUE

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