On Tue, Sep 19, 2017 at 01:54:57PM +0200, Andrey Konovalov wrote: > On Mon, Sep 18, 2017 at 8:50 PM, Greg Kroah-Hartman > <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > On Mon, Sep 18, 2017 at 07:22:24PM +0200, Andrey Konovalov wrote: > >> Hi! > >> > >> I've got the following crash while fuzzing the kernel with syzkaller. > >> > >> On commit ebb2c2437d8008d46796902ff390653822af6cc4 (Sep 18). > >> > >> It seems there's no proper size check of a > >> USB_DT_INTERFACE_ASSOCIATION descriptor. It's only checked that the > >> size is >= 2 in usb_parse_configuration(), so find_iad() might do > >> out-of-bounds access to intf_assoc->bInterfaceCount. > > > > Ah, nice catch! > > > > Does the patch below fix this? > > Hi Greg, > > I believe it does and the bug is no longer triggered with the > reproducer that I have. > > Tested-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx> Thanks for testing, I'll go queue this up. 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
