WARNING in flexcop_usb_probe/usb_submit_urb

From: syzbot <syzbot+26a8e8c838ca7937dc9e@syzkaller.appspotmail.com>
To: andreyknvl@google.com, gregkh@linuxfoundation.org,
	gustavo@embeddedor.com, linux-kernel@vger.kernel.org,
	linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: WARNING in flexcop_usb_probe/usb_submit_urb
Date: Wed, 21 Aug 2019 05:58:07 -0700	[thread overview]
Message-ID: <000000000000d8e41d0590a01fc7@google.com> (raw)

Hello,

syzbot found the following crash on:

HEAD commit:    eea39f24 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=151c664c600000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d0c62209eedfd54e
dashboard link: https://syzkaller.appspot.com/bug?extid=26a8e8c838ca7937dc9e
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16c6042e600000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14d8d64c600000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+26a8e8c838ca7937dc9e@syzkaller.appspotmail.com

lgdt330x 0-0059: Demod loaded for LGDT3303 chip
tuner-simple 0-0061: creating new instance
tuner-simple 0-0061: type set to 64 (LG TDVS-H06xF)
b2c2-flexcop: found 'LG Electronics LGDT3303 VSB/QAM Frontend' .
usb 1-1: DVB: registering adapter 0 frontend 0 (LG Electronics LGDT3303  
VSB/QAM Frontend)...
b2c2-flexcop: initialization of 'Air2PC/AirStar 2 ATSC 3rd generation  
(HD5000)' at the 'USB' bus controlled by a 'FlexCopIII' complete
------------[ cut here ]------------
usb 1-1: BOGUS urb xfer, pipe 0 != type 1
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 5.3.0-rc5+ #28
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+0x2a3/0x6da kernel/panic.c:219
  __warn.cold+0x20/0x4a 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+0x23/0x30 arch/x86/entry/entry_64.S:1028
RIP: 0010:usb_submit_urb+0x1188/0x13b0 drivers/usb/core/urb.c:477
Code: 4d 85 ed 74 2c e8 88 ba ef fd 4c 89 f7 e8 70 bf 1c ff 41 89 d8 44 89  
e1 4c 89 ea 48 89 c6 48 c7 c7 00 69 18 86 e8 6d a0 c5 fd <0f> 0b e9 20 f4  
ff ff e8 5c ba ef fd 4c 89 f2 48 b8 00 00 00 00 00
RSP: 0018:ffff8881da20f278 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81288cfd RDI: ffffed103b441e41
RBP: ffff8881d530c300 R08: ffff8881da1f9800 R09: ffffed103b645d58
R10: ffffed103b645d57 R11: ffff8881db22eabf R12: 0000000000000000
R13: ffff8881cf2f0930 R14: ffff8881d69791a0 R15: ffff8881d5f5f780
  flexcop_usb_transfer_init drivers/media/usb/b2c2/flexcop-usb.c:484 [inline]
  flexcop_usb_probe.cold+0x5c0/0x7bd drivers/media/usb/b2c2/flexcop-usb.c:575
  usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361
  really_probe+0x281/0x6d0 drivers/base/dd.c:548
  driver_probe_device+0x101/0x1b0 drivers/base/dd.c:721
  __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828
  bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:454
  __device_attach+0x217/0x360 drivers/base/dd.c:894
  bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514
  device_add+0xae6/0x16f0 drivers/base/core.c:2165
  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+0x281/0x6d0 drivers/base/dd.c:548
  driver_probe_device+0x101/0x1b0 drivers/base/dd.c:721
  __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828
  bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:454
  __device_attach+0x217/0x360 drivers/base/dd.c:894
  bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514
  device_add+0xae6/0x16f0 drivers/base/core.c:2165
  usb_new_device.cold+0x6a4/0xe79 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+0x1b5c/0x3640 drivers/usb/core/hub.c:5441
  process_one_work+0x92b/0x1530 kernel/workqueue.c:2269
  worker_thread+0x96/0xe20 kernel/workqueue.c:2415
  kthread+0x318/0x420 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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