Re: usb/input/gtco: slab-out-of-bounds in parse_hid_report_descriptor

2017-10-23 Thread Dmitry Torokhov
On Mon, Oct 23, 2017 at 01:24:23PM +0200, Andrey Konovalov wrote: > Hi! > > I've got the following report while fuzzing the kernel with syzkaller. > > On commit 3e0cc09a3a2c40ec1ffb6b4e12da86e98feccb11 (4.14-rc5+). > > parse_hid_report_descriptor() has a while (i < length) loop, which > only gua

usb/input/gtco: slab-out-of-bounds in parse_hid_report_descriptor

2017-10-23 Thread Andrey Konovalov
Hi! I've got the following report while fuzzing the kernel with syzkaller. On commit 3e0cc09a3a2c40ec1ffb6b4e12da86e98feccb11 (4.14-rc5+). parse_hid_report_descriptor() has a while (i < length) loop, which only guarantees that there's at least 1 byte in the buffer, but the loop body can read mul