On Mon, 29 Jul 2019 18:38:06 +0200, syzbot wrote: > > Hello, > > syzbot found the following crash on: > > HEAD commit: 7f7867ff usb-fuzzer: main usb gadget fuzzer driver > git tree: https://github.com/google/kasan.git usb-fuzzer > console output: https://syzkaller.appspot.com/x/log.txt?x=12befdc8600000 > kernel config: https://syzkaller.appspot.com/x/.config?x=792eb47789f57810 > dashboard link: https://syzkaller.appspot.com/bug?extid=d59c4387bfb6eced94e2 > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16efc49fa00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13245854600000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+d59c4387bfb6eced94e2@xxxxxxxxxxxxxxxxxxxxxxxxx > > usb 1-1: New USB device found, idVendor=07fd, idProduct=0004, > bcdDevice=d5.ac > usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 > usb 1-1: config 0 descriptor?? > usb 1-1: string descriptor 0 read error: -71 > usb 1-1: Waiting for MOTU Microbook II to boot up... > kasan: CONFIG_KASAN_INLINE enabled > kasan: GPF could be caused by NULL-ptr deref or user memory access > general protection fault: 0000 [#1] SMP KASAN > CPU: 1 PID: 21 Comm: kworker/1:1 Not tainted 5.3.0-rc2+ #23 > Hardware name: Google Google Compute Engine/Google Compute Engine, > BIOS Google 01/01/2011 > Workqueue: usb_hub_wq hub_event > RIP: 0010:snd_usb_pipe_sanity_check+0x80/0x130 sound/usb/helper.c:75 > Code: 48 c1 ea 03 80 3c 02 00 0f 85 b3 00 00 00 48 8b 6d 00 c1 eb 1e > 48 b8 00 00 00 00 00 fc ff df 48 8d 7d 03 48 89 fa 48 c1 ea 03 <0f> > b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 7b 48 b8 00 00 > RSP: 0018:ffff8881da2f7010 EFLAGS: 00010246 > RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffffff8484d252 > RDX: 0000000000000000 RSI: ffffffff8484d26c RDI: 0000000000000003 > RBP: 0000000000000000 R08: ffff8881da22e000 R09: ffffed103b665d58 > R10: ffffed103b665d57 R11: ffff8881db32eabf R12: 0000000000000000 > R13: ffff8881d400ba80 R14: 1ffff1103b45ee06 R15: ffff8881c79244a0 > FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f31b2a87000 CR3: 00000001d3fd4000 CR4: 00000000001406e0 > Call Trace: > snd_usb_motu_microbookii_communicate.constprop.0+0xa0/0x2fb > sound/usb/quirks.c:1007 > snd_usb_motu_microbookii_boot_quirk sound/usb/quirks.c:1051 [inline] > snd_usb_apply_boot_quirk.cold+0x163/0x370 sound/usb/quirks.c:1280 > usb_audio_probe+0x2ec/0x2010 sound/usb/card.c:576 > usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361 > really_probe+0x281/0x650 drivers/base/dd.c:548 > driver_probe_device+0x101/0x1b0 drivers/base/dd.c:709 (snip) So finally we hit this known issue. Hillf, please mark this one to your fix patch once when ready. Thanks! Takashi
