linux-kernel - Re: [syzbot] KASAN: use-after-free Read in kernfs_next_descendant

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Message-ID: <0000000000007084e105eb7e0869@google.com>
Date:   Thu, 20 Oct 2022 14:30:23 -0700
From:   syzbot <syzbot+6bc35f3913193fe7f0d3@...kaller.appspotmail.com>
To:     hdanton@...a.com, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com, tj@...nel.org
Subject: Re: [syzbot] KASAN: use-after-free Read in kernfs_next_descendant_post
 (2)

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
SYZFATAL: executor failed NUM times: executor NUM: exit status NUM

2022/10/20 21:28:38 SYZFATAL: executor failed 11 times: executor 0: exit status 67
SYZFAIL: wrong response packet
 (errno 16: Device or resource busy)
loop exited with status 67

SYZFAIL: wrong response packet
 (errno 16: Device or resource busy)
loop exited with status 67

Tested on:

commit:         55be6084 Merge tag 'timers-core-2022-10-05' of git://g..
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=1086ad3c880000
kernel config:  https://syzkaller.appspot.com/x/.config?x=df75278aabf0681a
dashboard link: https://syzkaller.appspot.com/bug?extid=6bc35f3913193fe7f0d3
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
patch:          https://syzkaller.appspot.com/x/patch.diff?x=1540e4ba880000