Return-Path: MIME-Version: 1.0 Sender: sonnyrao@google.com In-Reply-To: References: <2583063.yEXEROAGYt@linux-lqwf.site> From: Sonny Rao Date: Tue, 28 Aug 2012 21:13:43 -0700 Message-ID: Subject: Re: kernel crashes coming from btusb To: Oliver Neukum Cc: linux-bluetooth@vger.kernel.org, marcel@holtmann.org, vpalatin@chromium.org, keybuk@chromium.org Content-Type: text/plain; charset=ISO-8859-1 List-ID: On Mon, Aug 27, 2012 at 8:02 AM, Sonny Rao wrote: > On Mon, Aug 27, 2012 at 6:06 AM, Oliver Neukum wrote: >> On Monday 27 August 2012 03:30:55 Sonny Rao wrote: >>> Hi, I've been investigating an issue where we were seeing random >>> kernel crashes soon after resume and after using the great debugging >>> facilities in SLUB I started getting output which pointed to "use >>> after free" from the btusb driver. >> >> Which kernel version? >> >> Regards >> Oliver >> > > Oops sorry, kernel 3.4 After some more investigation I am seeing the DMA unmap and it looks like everything is okay as far as the driver tearing down the intr URB correctly, sorry for the noise stating otherwise. This could be a hardware issue if the host controller is still dmaing over that transfer buffer. I'll look into that some more, thanks.