linux-kernel - Re: [syzbot] [bcachefs?] KASAN: use-after-free Read in bch2_check

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Message-ID: <67520e3b.050a0220.b4160.01e6.GAE@google.com>
Date: Thu, 05 Dec 2024 12:34:03 -0800
From: syzbot <syzbot+fea0322882c0cba65f11@...kaller.appspotmail.com>
To: brauner@...nel.org, jack@...e.cz, kent.overstreet@...ux.dev, 
	linux-bcachefs@...r.kernel.org, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com, 
	viro@...iv.linux.org.uk
Subject: Re: [syzbot] [bcachefs?] KASAN: use-after-free Read in bch2_check_dirents

syzbot has bisected this issue to:

commit d97de0d017cde0d442c3d144b4f969f43064cc0f
Author: Kent Overstreet <kent.overstreet@...ux.dev>
Date:   Tue Aug 13 01:31:25 2024 +0000

    bcachefs: Make bkey_fsck_err() a wrapper around fsck_err()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=11a09330580000
start commit:   cfaaa7d010d1 Merge tag 'net-6.12-rc8' of git://git.kernel...
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=13a09330580000
console output: https://syzkaller.appspot.com/x/log.txt?x=15a09330580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=1503500c6f615d24
dashboard link: https://syzkaller.appspot.com/bug?extid=fea0322882c0cba65f11
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=112b1130580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1256ab5f980000

Reported-by: syzbot+fea0322882c0cba65f11@...kaller.appspotmail.com
Fixes: d97de0d017cd ("bcachefs: Make bkey_fsck_err() a wrapper around fsck_err()")

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