WARNING in hso_probe

From: syzbot <syzbot+f00009d1881ba5ac45f8@syzkaller.appspotmail.com>
To: andreyknvl@google.com, gregkh@linuxfoundation.org,
	linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org,
	rafael@kernel.org, syzkaller-bugs@googlegroups.com
Subject: WARNING in hso_probe
Date: Fri, 27 Sep 2019 10:19:08 -0700	[thread overview]
Message-ID: <0000000000007831a205938c15a0@google.com> (raw)

Hello,

syzbot found the following crash on:

HEAD commit:    2994c077 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=145faaf3600000
kernel config:  https://syzkaller.appspot.com/x/.config?x=69ddefac6929256a
dashboard link: https://syzkaller.appspot.com/bug?extid=f00009d1881ba5ac45f8
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=149c5aa9600000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1318fa39600000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+f00009d1881ba5ac45f8@syzkaller.appspotmail.com

sysfs group 'power' not found for kobject 'ttyHS0'
WARNING: CPU: 0 PID: 12 at fs/sysfs/group.c:278 sysfs_remove_group  
fs/sysfs/group.c:278 [inline]
WARNING: CPU: 0 PID: 12 at fs/sysfs/group.c:278  
sysfs_remove_group+0x155/0x1b0 fs/sysfs/group.c:269
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.3.0+ #0
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:sysfs_remove_group fs/sysfs/group.c:278 [inline]
RIP: 0010:sysfs_remove_group+0x155/0x1b0 fs/sysfs/group.c:269
Code: 48 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c  
01 00 75 41 48 8b 33 48 c7 c7 20 de d0 85 e8 20 29 8a ff <0f> 0b eb 95 e8  
12 b3 db ff e9 d2 fe ff ff 48 89 df e8 05 b3 db ff
RSP: 0018:ffff8881da20f150 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffffffff85f34640 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8128d3fd RDI: ffffed103b441e1c
RBP: 0000000000000000 R08: ffff8881da1f9800 R09: fffffbfff11f45ae
R10: fffffbfff11f45ad R11: ffffffff88fa2d6f R12: ffff8881d909b300
R13: ffffffff85f34be0 R14: ffff8881d9099980 R15: ffff8881d909eef0
  dpm_sysfs_remove+0x97/0xb0 drivers/base/power/sysfs.c:741
  device_del+0x12a/0xb10 drivers/base/core.c:2352
  device_unregister drivers/base/core.c:2407 [inline]
  device_destroy+0x96/0xe0 drivers/base/core.c:2986
  tty_unregister_device+0x7e/0x1a0 drivers/tty/tty_io.c:3185
  hso_serial_tty_unregister drivers/net/usb/hso.c:2231 [inline]
  hso_create_bulk_serial_device drivers/net/usb/hso.c:2668 [inline]
  hso_probe.cold+0xc8/0x121 drivers/net/usb/hso.c:2934
  usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361
  really_probe+0x281/0x6d0 drivers/base/dd.c:548
  driver_probe_device+0x104/0x210 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:430
  __device_attach+0x217/0x360 drivers/base/dd.c:894
  bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490
  device_add+0xae6/0x16f0 drivers/base/core.c:2201
  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+0x104/0x210 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:430
  __device_attach+0x217/0x360 drivers/base/dd.c:894
  bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490
  device_add+0xae6/0x16f0 drivers/base/core.c:2201
  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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