On Tue, 21 Nov 2017 14:51:56 +0100, Andrey Konovalov wrote: > > Hi! > > I've got the following report while fuzzing the kernel with syzkaller. > > On commit e1d1ea549b57790a3d8cf6300e6ef86118d692a3 (4.15-rc1). > > ================================================================== > BUG: KASAN: slab-out-of-bounds in parse_audio_unit+0x2e08/0x31d0 > Read of size 1 at addr ffff88006998ff20 by task kworker/1:1/1495 > > CPU: 1 PID: 1495 Comm: kworker/1:1 Not tainted 4.14.0-57501-g9284d204d604 #119 > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 > Workqueue: usb_hub_wq hub_event > Call Trace: > __dump_stack lib/dump_stack.c:17 > dump_stack+0xe1/0x157 lib/dump_stack.c:53 > print_address_description+0x71/0x234 mm/kasan/report.c:252 > kasan_report_error mm/kasan/report.c:351 > kasan_report+0x173/0x270 mm/kasan/report.c:409 > __asan_report_load1_noabort+0x19/0x20 mm/kasan/report.c:427 > parse_audio_feature_unit sound/usb/mixer.c:1472 Looks like that a malformed feature unit descriptor is passed while the usb-audio driver is too naive to believe in a perfect world. I'll provide a fix patch. thanks, Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
