From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: syzbot <syzbot+ce483fd06e2061f44f5d@syzkaller.appspotmail.com>,
akpm@linux-foundation.org, liam.howlett@oracle.com,
linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, linux-usb@vger.kernel.org,
syzkaller-bugs@googlegroups.com, vbabka@suse.cz,
Marcello Sylvester Bauer <sylv@sylv.io>,
Jiri Kosina <jikos@kernel.org>,
Benjamin Tissoires <bentiss@kernel.org>
Subject: Re: [syzbot] [input?] [usb?] [mm?] INFO: rcu detected stall in vma_link_file
Date: Wed, 16 Oct 2024 17:30:39 +0900 [thread overview]
Message-ID: <a0f21b01-3937-41e5-846d-340df0239e87@I-love.SAKURA.ne.jp> (raw)
In-Reply-To: <2024101602-skintight-crawfish-ebab@gregkh>
On 2024/10/16 16:14, Greg Kroah-Hartman wrote:
> On Wed, Oct 16, 2024 at 08:06:20AM +0100, Lorenzo Stoakes wrote:
>> + some people from USB/HID subsystem.
>>
>> This is really not looking mm-related, as for a second time we've asked
>> syzbot to re-run and for a second time it's not hit any mm-specific code -
>> I think this is misattributed - could somebody from the USB/HID side take a
>> look?
>>
>> It looks to be something that isn't reproduced by a specific C program but
>> by a syzkaller USB configuration [0]?
>
> There's a lot of odd usb syzbot issues right now dealing with the dummy
> hcd controller, so maybe this is another one of them...
This is a printk() flooding stall triggered by SysRq-t.
sched_show_task+0x3f0/0x5f0 kernel/sched/core.c:7557
show_state_filter+0xee/0x320 kernel/sched/core.c:7627
k_spec drivers/tty/vt/keyboard.c:667 [inline]
k_spec+0xed/0x150 drivers/tty/vt/keyboard.c:656
kbd_keycode drivers/tty/vt/keyboard.c:1522 [inline]
kbd_event+0xcbd/0x17a0 drivers/tty/vt/keyboard.c:1541
prev parent reply other threads:[~2024-12-05 15:22 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-14 15:02 syzbot
2024-10-15 8:44 ` Lorenzo Stoakes
2024-10-15 10:32 ` syzbot
2024-10-15 10:43 ` Lorenzo Stoakes
2024-10-15 20:05 ` Liam R. Howlett
2024-10-15 20:27 ` syzbot
2024-10-16 7:06 ` Lorenzo Stoakes
2024-10-16 7:14 ` Greg Kroah-Hartman
2024-10-16 8:30 ` Tetsuo Handa [this message]
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