linux-ext4 - Re: [syzbot] [ext4?] WARNING in mb_cache

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Date: Tue, 30 Apr 2024 08:04:03 -0700
From: syzbot <syzbot+dd43bd0f7474512edc47@...kaller.appspotmail.com>
To: adilger.kernel@...ger.ca, jack@...e.cz, libaokun1@...wei.com, 
	linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, llvm@...ts.linux.dev, nathan@...nel.org, 
	ndesaulniers@...gle.com, ritesh.list@...il.com, 
	syzkaller-bugs@...glegroups.com, trix@...hat.com, tytso@....edu
Subject: Re: [syzbot] [ext4?] WARNING in mb_cache_destroy

syzbot has bisected this issue to:

commit 67d7d8ad99beccd9fe92d585b87f1760dc9018e3
Author: Baokun Li <libaokun1@...wei.com>
Date:   Thu Jun 16 02:13:56 2022 +0000

    ext4: fix use-after-free in ext4_xattr_set_entry

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1011bcf8980000
start commit:   b947cc5bf6d7 Merge tag 'erofs-for-6.9-rc7-fixes' of git://..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=1211bcf8980000
console output: https://syzkaller.appspot.com/x/log.txt?x=1411bcf8980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d2f00edef461175
dashboard link: https://syzkaller.appspot.com/bug?extid=dd43bd0f7474512edc47
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11d2957f180000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1620ca40980000

Reported-by: syzbot+dd43bd0f7474512edc47@...kaller.appspotmail.com
Fixes: 67d7d8ad99be ("ext4: fix use-after-free in ext4_xattr_set_entry")

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