linux-kernel - Re: [syzbot] [tomoyo?] [bpf?] INFO: rcu detected stall in security_file

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Message-ID: <ecb32549-8b6f-4b8d-b832-4f86adb95183@I-love.SAKURA.ne.jp>
Date:   Tue, 27 Jun 2023 19:06:04 +0900
From:   Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To:     Sean Young <sean@...s.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org
Cc:     syzkaller-bugs@...glegroups.com,
        syzbot <syzbot+bb11ad7bb33b56ca4d4b@...kaller.appspotmail.com>,
        USB list <linux-usb@...r.kernel.org>
Subject: Re: [syzbot] [tomoyo?] [bpf?] INFO: rcu detected stall in
 security_file_open (6)

Ping?

How do you plan to avoid printk() flooding?

#syz dup: INFO: rcu detected stall in newfstatat (3)

On 2023/06/27 18:51, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    8a28a0b6f1a1 Merge tag 'net-6.4-rc8' of git://git.kernel.o..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=1335a9db280000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=2cbd298d0aff1140
> dashboard link: https://syzkaller.appspot.com/bug?extid=bb11ad7bb33b56ca4d4b
> compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16841cc0a80000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16fc6e1f280000
> 
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/d02009a9822d/disk-8a28a0b6.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/f33ad4ef1182/vmlinux-8a28a0b6.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/f795a8ae7a8c/bzImage-8a28a0b6.xz
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+bb11ad7bb33b56ca4d4b@...kaller.appspotmail.com