[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Mon, 12 Dec 2016 16:05:43 -0500 (EST)
From: Alan Stern <stern@...land.harvard.edu>
To: Andrey Konovalov <andreyknvl@...gle.com>
cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
USB list <linux-usb@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>,
Dmitry Vyukov <dvyukov@...gle.com>,
Kostya Serebryany <kcc@...gle.com>,
syzkaller <syzkaller@...glegroups.com>
Subject: Re: usb/core: warning in usb_create_ep_devs/sysfs_create_dir_ns
On Mon, 12 Dec 2016, Andrey Konovalov wrote:
> Hi!
>
> While running the syzkaller fuzzer I've got the following error report.
>
> On commit 3c49de52d5647cda8b42c4255cf8a29d1e22eff5 (Dev 2).
>
> WARNING: CPU: 2 PID: 865 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x8a/0xa0
> gadgetfs: disconnected
> sysfs: cannot create duplicate filename
> '/devices/platform/dummy_hcd.0/usb2/2-1/2-1:64.0/ep_05'
> Kernel panic - not syncing: panic_on_warn set ...
I suppose we could check for USB devices that claim to have two
endpoints with the same address. But is it really worthwhile? A
kernel warning isn't so bad when you're dealing with buggy device
firmware.
Alan Stern
Powered by blists - more mailing lists