On Wed, May 06, 2009 at 08:35:52AM +0200, Eric Valette wrote: > FUJITA Tomonori wrote: > > CC'ed linux-usb, > > > > The ehci_hcd driver uses buffers on the stack for DMA? > > > > On Sun, 03 May 2009 17:36:24 +0200 > > Eric Valette <eric.valette@xxxxxxx> wrote: > > > >> ------------[ cut here ]------------ > >> > >> WARNING: at /usr/src/linux-2.6.22.9/lib/dma-debug.c:609 > > > > Hmm, the kernel version is wired. lib/dma-debug.c was added in > > 2.6.30-rc. > > No that's the file path. I use ketchup to apply patches... > > > > >> check_for_stack+0x6b/0x8b() > >> Hardware name: P5W DH Deluxe > >> > >> ehci_hcd 0000:00:1d.7: DMA-API: device driver maps memory fromstack > >> [addr=ffff88007fa79968] > >> Modules linked in: > >> > >> Pid: 297, comm: khubd Not tainted 2.6.30-rc4-git1 #32 > > Here is the real version. The problem is in the rtl8187 driver. They are calling usb_control_msg and passing a pointer to a buffer on the stack. See drivers/net/wireless/rtl818x/rtl8187.h for where the problem happens in numerous places. Also it looks like rtl8225_write_8051() is incorrect. You are passing a pointer to a variable that was passed as an argument. I don't know where that is supposed to be on, somewhere on the stack I guess. Larry, care to fix this up? thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
