Hello,
syzbot found the following crash on:
HEAD commit: 6a3599ce 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=11a9bbe0600000
kernel config: https://syzkaller.appspot.com/x/.config?x=700ca426ab83faae
dashboard link: https://syzkaller.appspot.com/bug?extid=4dda1bca161e5d7690c5
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=153009a4600000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15e6f68fa00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+4dda1bca161e5d7690c5@xxxxxxxxxxxxxxxxxxxxxxxxx
usb 1-1: config 6 interface 14 altsetting 0 bulk endpoint 0x5 has invalid
maxpacket 4
usb 1-1: New USB device found, idVendor=133e, idProduct=0815,
bcdDevice=a4.d4
usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
------------[ cut here ]------------
usb 1-1: BOGUS urb xfer, pipe 1 != type 3
WARNING: CPU: 0 PID: 12 at drivers/usb/core/urb.c:477
usb_submit_urb+0x1188/0x13b0 /drivers/usb/core/urb.c:477
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.2.0-rc6+ #15
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
__dump_stack /lib/dump_stack.c:77 [inline]
dump_stack+0xca/0x13e /lib/dump_stack.c:113
panic+0x292/0x6c9 /kernel/panic.c:219
__warn.cold+0x20/0x4b /kernel/panic.c:576
report_bug+0x262/0x2a0 /lib/bug.c:186
fixup_bug /arch/x86/kernel/traps.c:179 [inline]
fixup_bug /arch/x86/kernel/traps.c:174 [inline]
do_error_trap+0x12b/0x1e0 /arch/x86/kernel/traps.c:272
do_invalid_op+0x32/0x40 /arch/x86/kernel/traps.c:291
invalid_op+0x14/0x20 /arch/x86/entry/entry_64.S:986
RIP: 0010:usb_submit_urb+0x1188/0x13b0 /drivers/usb/core/urb.c:477
Code: 4d 85 ed 74 2c e8 f8 d3 f4 fd 4c 89 f7 e8 a0 51 1c ff 41 89 d8 44 89
e1 4c 89 ea 48 89 c6 48 c7 c7 00 0e f7 85 e8 83 98 ca fd <0f> 0b e9 20 f4
ff ff e8 cc d3 f4 fd 4c 89 f2 48 b8 00 00 00 00 00
RSP: 0018:ffff8881d9e0ef00 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8127ef3d RDI: ffffed103b3c1dd2
RBP: ffff8881d39fdd00 R08: ffff8881d9df9800 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: ffff8881cdc57b40 R14: ffff8881cff78920 R15: ffff8881d4a84900
usb_start_wait_urb+0x108/0x2b0 /drivers/usb/core/message.c:57
usb_bulk_msg+0x228/0x550 /drivers/usb/core/message.c:253
snd_usb_accessmusic_boot_quirk /sound/usb/quirks.c:838 [inline]
snd_usb_apply_boot_quirk+0x99e/0xb30 /sound/usb/quirks.c:1255
usb_audio_probe+0x2ec/0x2010 /sound/usb/card.c:576
usb_probe_interface+0x305/0x7a0 /drivers/usb/core/driver.c:361
really_probe+0x281/0x660 /drivers/base/dd.c:509
driver_probe_device+0x104/0x210 /drivers/base/dd.c:670
__device_attach_driver+0x1c2/0x220 /drivers/base/dd.c:777
bus_for_each_drv+0x15c/0x1e0 /drivers/base/bus.c:454
__device_attach+0x217/0x360 /drivers/base/dd.c:843
bus_probe_device+0x1e4/0x290 /drivers/base/bus.c:514
device_add+0xae6/0x16f0 /drivers/base/core.c:2111
usb_set_configuration+0xdf6/0x1670 /drivers/usb/core/message.c:2023
generic_probe+0x9d/0xd5 /drivers/usb/core/generic.c:210
usb_probe_device+0x99/0x100 /drivers/usb/core/driver.c:266
really_probe+0x281/0x660 /drivers/base/dd.c:509
driver_probe_device+0x104/0x210 /drivers/base/dd.c:670
__device_attach_driver+0x1c2/0x220 /drivers/base/dd.c:777
bus_for_each_drv+0x15c/0x1e0 /drivers/base/bus.c:454
__device_attach+0x217/0x360 /drivers/base/dd.c:843
bus_probe_device+0x1e4/0x290 /drivers/base/bus.c:514
device_add+0xae6/0x16f0 /drivers/base/core.c:2111
usb_new_device.cold+0x6a4/0xe61 /drivers/usb/core/hub.c:2536
hub_port_connect /drivers/usb/core/hub.c:5098 [inline]
hub_port_connect_change /drivers/usb/core/hub.c:5213 [inline]
port_event /drivers/usb/core/hub.c:5359 [inline]
hub_event+0x1abd/0x3550 /drivers/usb/core/hub.c:5441
process_one_work+0x905/0x1570 /kernel/workqueue.c:2269
worker_thread+0x96/0xe20 /kernel/workqueue.c:2415
kthread+0x30b/0x410 /kernel/kthread.c:255
ret_from_fork+0x24/0x30 /arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..
---
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