From: Alan Stern <stern@rowland.harvard.edu>
To: syzbot <syzbot+10e5f68920f13587ab12@syzkaller.appspotmail.com>
Cc: andreyknvl@google.com, <gregkh@linuxfoundation.org>,
<gustavo@embeddedor.com>, <ingrassia@epigenesys.com>,
<linux-kernel@vger.kernel.org>, <linux-usb@vger.kernel.org>,
<syzkaller-bugs@googlegroups.com>
Subject: Re: WARNING in usbhid_raw_request/usb_submit_urb (2)
Date: Thu, 9 Jan 2020 11:46:07 -0500 (EST) [thread overview]
Message-ID: <Pine.LNX.4.44L0.2001091142281.1307-100000@iolanthe.rowland.org> (raw)
In-Reply-To: <0000000000001b53f8059ba5431a@google.com>
On Wed, 8 Jan 2020, syzbot wrote:
> Hello,
>
> syzbot has tested the proposed patch and the reproducer did not trigger
> crash:
>
> Reported-and-tested-by:
> syzbot+10e5f68920f13587ab12@syzkaller.appspotmail.com
>
> Tested on:
>
> commit: ecdf2214 usb: gadget: add raw-gadget interface
> git tree: https://github.com/google/kasan.git
> kernel config: https://syzkaller.appspot.com/x/.config?x=b06a019075333661
> dashboard link: https://syzkaller.appspot.com/bug?extid=10e5f68920f13587ab12
> compiler: gcc (GCC) 9.0.0 20181231 (experimental)
> patch: https://syzkaller.appspot.com/x/patch.diff?x=1583963ee00000
>
> Note: testing is done by a robot and is best-effort only.
I'm at a loss for a way to track this down any farther. The difference
between this patch and the previous was very small and almost entirely
confined to actions that take place _after_ the bug condition has been
detected.
If this is indeed caused by a race, it would be nice to know that the
two racing threads are doing. One of them we can see in the log output
(it's calling usb_control_msg) but the other is a mystery.
Alan Stern
next prev parent reply other threads:[~2020-01-09 16:46 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-22 14:54 WARNING in usbhid_raw_request/usb_submit_urb (2) syzbot
2019-12-30 3:53 ` syzbot
2020-01-03 16:35 ` Alan Stern
2020-01-03 16:57 ` syzbot
2020-01-03 17:01 ` Alan Stern
2020-01-07 14:28 ` Andrey Konovalov
2020-01-07 19:09 ` Alan Stern
2020-01-07 19:28 ` syzbot
2020-01-07 20:43 ` Alan Stern
2020-01-07 21:13 ` syzbot
2020-01-07 21:25 ` Alan Stern
2020-01-07 22:19 ` syzbot
2020-01-08 18:18 ` Alan Stern
2020-01-08 18:43 ` syzbot
2020-01-09 16:46 ` Alan Stern [this message]
2020-01-10 16:46 ` Andrey Konovalov
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