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

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Date:   Sat, 25 Nov 2023 03:54:03 -0800
From:   syzbot <syzbot+0b7937459742a0a4cffd@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, hch@....de, jack@...e.com, jack@...e.cz,
        linkinjeon@...il.com, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        syzkaller-bugs@...glegroups.com, willy@...radead.org
Subject: Re: [syzbot] [udf?] KASAN: slab-use-after-free Read in udf_free_blocks

syzbot has bisected this issue to:

commit 36273e5b4e3a934c6d346c8f0b16b97e018094af
Author: Christoph Hellwig <hch@....de>
Date:   Sun Nov 13 16:29:02 2022 +0000

    udf: remove ->writepage

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14d71cece80000
start commit:   123212f53f3e Add linux-next specific files for 20230707
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=16d71cece80000
console output: https://syzkaller.appspot.com/x/log.txt?x=12d71cece80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=15ec80b62f588543
dashboard link: https://syzkaller.appspot.com/bug?extid=0b7937459742a0a4cffd
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15be1190a80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17d4666aa80000

Reported-by: syzbot+0b7937459742a0a4cffd@...kaller.appspotmail.com
Fixes: 36273e5b4e3a ("udf: remove ->writepage")

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