linux-kernel - Re: Kernel Oops in USB HID

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Message-ID: <Pine.LNX.4.64.0810031409240.1532@twin.jikos.cz>
Date:	Fri, 3 Oct 2008 14:11:01 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Vit Kudrle <kudrle@....muni.cz>
cc:	linux-kernel@...r.kernel.org
Subject: Re: Kernel Oops in USB HID

On Fri, 3 Oct 2008, Vit Kudrle wrote:

> Oct  3 01:16:58 kernel: hub 2-0:1.0: port 7 disabled by hub (EMI?), re-enabling...
> Oct  3 01:16:58 kernel: usb 2-7: USB disconnect, address 39
> Oct  3 01:16:58 kernel: drivers/hid/usbhid/hid-core.c: usb_submit_urb(ctrl) failed
> Oct  3 01:16:58 kernel: BUG: unable to handle kernel NULL pointer dereference at 00000000000000c8
> Oct  3 01:16:58 kernel: IP: [<ffffffff803b0755>] hiddev_ioctl+0x39/0x552

Hi,

could you please use 'addr2line' utility on address 0xffffffff803b0755 to 
identify the line on which the NULL pointer dereference happened?

Obviously there is some missing handling of error conditions from usbhid 
code after the URB submission has failed.

Thanks,

-- 
Jiri Kosina
SUSE Labs

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