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

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Date:   Mon, 07 Aug 2023 20:24:36 -0700
From:   syzbot <syzbot+26860029a4d562566231@...kaller.appspotmail.com>
To:     brauner@...nel.org, clm@...com, dsterba@...e.com, hch@....de,
        josef@...icpanda.com, linux-btrfs@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [btrfs?] KASAN: slab-use-after-free Read in btrfs_open_devices

syzbot has bisected this issue to:

commit 066d64b26a21a5b5c500a30f27f3e4b1959aac9e
Author: Christoph Hellwig <hch@....de>
Date:   Wed Aug 2 15:41:23 2023 +0000

    btrfs: open block devices after superblock creation

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=15493371a80000
start commit:   f7dc24b34138 Add linux-next specific files for 20230807
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=17493371a80000
console output: https://syzkaller.appspot.com/x/log.txt?x=13493371a80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d7847c9dca13d6c5
dashboard link: https://syzkaller.appspot.com/bug?extid=26860029a4d562566231
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=179704c9a80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17868ba9a80000

Reported-by: syzbot+26860029a4d562566231@...kaller.appspotmail.com
Fixes: 066d64b26a21 ("btrfs: open block devices after superblock creation")

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