linux-kernel - Re: [syzbot] [jfs?] KASAN: slab-use-after-free Read in dbFreeBits

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Message-ID: <000000000000b28361061fd5de24@google.com>
Date: Fri, 16 Aug 2024 17:08:04 -0700
From: syzbot <syzbot+3c010e21296f33a5dc16@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, axboe@...nel.dk, eadavis@...com, 
	jfs-discussion@...ts.sourceforge.net, kristian@...usen.dk, 
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, shaggy@...nel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [jfs?] KASAN: slab-use-after-free Read in dbFreeBits

syzbot has bisected this issue to:

commit 2b9ac22b12a266eb4fec246a07b504dd4983b16b
Author: Kristian Klausen <kristian@...usen.dk>
Date:   Fri Jun 18 11:51:57 2021 +0000

    loop: Fix missing discard support when using LOOP_CONFIGURE

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16f44605980000
start commit:   d7a5aa4b3c00 Merge tag 'perf-tools-fixes-for-v6.11-2024-08..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=15f44605980000
console output: https://syzkaller.appspot.com/x/log.txt?x=11f44605980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=92c0312151c4e32e
dashboard link: https://syzkaller.appspot.com/bug?extid=3c010e21296f33a5dc16
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=139469f5980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=100f7713980000

Reported-by: syzbot+3c010e21296f33a5dc16@...kaller.appspotmail.com
Fixes: 2b9ac22b12a2 ("loop: Fix missing discard support when using LOOP_CONFIGURE")

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