AuxXxilium/linux_dsm_epyc7002
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46e4a26615
linux_dsm_epyc7002/drivers/media/usb
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Sean Young 46e4a26615 media: em28xx: modules workqueue not inited for 2nd device 
syzbot reports an error on flush_request_modules() for the second device.
This workqueue was never initialised so simply remove the offending line.

usb 1-1: USB disconnect, device number 2
em28xx 1-1:1.153: Disconnecting em28xx #1
------------[ cut here ]------------
WARNING: CPU: 0 PID: 12 at kernel/workqueue.c:3031
__flush_work.cold+0x2c/0x36 kernel/workqueue.c:3031
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.3.0-rc2+ #25
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:1026
RIP: 0010:__flush_work.cold+0x2c/0x36 kernel/workqueue.c:3031
Code: 9a 22 00 48 c7 c7 20 e4 c5 85 e8 d9 3a 0d 00 0f 0b 45 31 e4 e9 98 86
ff ff e8 51 9a 22 00 48 c7 c7 20 e4 c5 85 e8 be 3a 0d 00 <0f> 0b 45 31 e4
e9 7d 86 ff ff e8 36 9a 22 00 48 c7 c7 20 e4 c5 85
RSP: 0018:ffff8881da20f720 EFLAGS: 00010286
RAX: 0000000000000024 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8128a0fd RDI: ffffed103b441ed6
RBP: ffff8881da20f888 R08: 0000000000000024 R09: fffffbfff11acd9a
R10: fffffbfff11acd99 R11: ffffffff88d66ccf R12: 0000000000000000
R13: 0000000000000001 R14: ffff8881c6685df8 R15: ffff8881d2a85b78
  flush_request_modules drivers/media/usb/em28xx/em28xx-cards.c:3325 [inline]
  em28xx_usb_disconnect.cold+0x280/0x2a6
drivers/media/usb/em28xx/em28xx-cards.c:4023
  usb_unbind_interface+0x1bd/0x8a0 drivers/usb/core/driver.c:423
  __device_release_driver drivers/base/dd.c:1120 [inline]
  device_release_driver_internal+0x404/0x4c0 drivers/base/dd.c:1151
  bus_remove_device+0x2dc/0x4a0 drivers/base/bus.c:556
  device_del+0x420/0xb10 drivers/base/core.c:2288
  usb_disable_device+0x211/0x690 drivers/usb/core/message.c:1237
  usb_disconnect+0x284/0x8d0 drivers/usb/core/hub.c:2199
  hub_port_connect drivers/usb/core/hub.c:4949 [inline]
  hub_port_connect_change drivers/usb/core/hub.c:5213 [inline]
  port_event drivers/usb/core/hub.c:5359 [inline]
  hub_event+0x1454/0x3640 drivers/usb/core/hub.c:5441
  process_one_work+0x92b/0x1530 kernel/workqueue.c:2269
  process_scheduled_works kernel/workqueue.c:2331 [inline]
  worker_thread+0x7ab/0xe20 kernel/workqueue.c:2417
  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..

Fixes: be7fd3c3a8 ("media: em28xx: Hauppauge DualHD second tuner functionality)
Reviewed-by: Ezequiel Garcia <ezequiel@collabora.com>
Reviewed-by: Brad Love <brad@nextdimension.cc>
Reported-by: syzbot+b7f57261c521087d89bb@syzkaller.appspotmail.com
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2019-08-14 05:06:44 -03:00
..
airspy media: media/usb: don't set description in ENUM_FMT 2019-07-22 14:01:05 -04:00
as102 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118 2019-05-24 17:39:02 +02:00
au0828 media: drivers/media: don't set pix->priv = 0 2019-07-23 08:48:33 -04:00
b2c2 treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
cpia2 media: drivers/media: don't set pix->priv = 0 2019-07-23 08:48:33 -04:00
cx231xx media: media/usb: don't set description in ENUM_FMT 2019-07-22 14:01:05 -04:00
dvb-usb media: don't drop front-end reference count for ->detach 2019-08-04 06:33:11 -03:00
dvb-usb-v2 media: dvbsky: add support for Mygica T230C v2 2019-07-22 15:33:30 -04:00
em28xx media: em28xx: modules workqueue not inited for 2nd device 2019-08-14 05:06:44 -03:00
go7007 media: usb: go7007: s2250-board: convert to i2c_new_dummy_device 2019-08-13 11:46:13 -03:00
gspca media: drivers/media: don't set pix->priv = 0 2019-07-23 08:48:33 -04:00
hackrf Linux 5.2-rc4 2019-06-11 12:09:28 -04:00
hdpvr media: hdpvr: Add device num check and handling 2019-07-25 06:23:35 -04:00
msi2500 media: media/usb: don't set description in ENUM_FMT 2019-07-22 14:01:05 -04:00
pulse8-cec treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 55 2019-05-24 17:36:42 +02:00
pvrusb2 media: pvrusb2: use kzalloc instead of kmalloc and memset 2019-08-13 11:48:57 -03:00
pwc media: media/usb: don't set description in ENUM_FMT 2019-07-22 14:01:05 -04:00
rainshadow-cec treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 55 2019-05-24 17:36:42 +02:00
s2255 media: drivers/media: don't set pix->priv = 0 2019-07-23 08:48:33 -04:00
siano USB fixes for 5.2-rc3 2019-05-31 08:16:31 -07:00
stk1160 media: media/usb: don't set description in ENUM_FMT 2019-07-22 14:01:05 -04:00
stkwebcam media: media/usb: don't set description in ENUM_FMT 2019-07-22 14:01:05 -04:00
tm6000 media: media/usb: don't set description in ENUM_FMT 2019-07-22 14:01:05 -04:00
ttusb-budget treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ttusb-dec treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
usbtv media: media/usb: don't set description in ENUM_FMT 2019-07-22 14:01:05 -04:00
usbvision media: media/usb: don't set description in ENUM_FMT 2019-07-22 14:01:05 -04:00
uvc media: drivers/media: don't set pix->priv = 0 2019-07-23 08:48:33 -04:00
zr364xx media: media/usb: Use kmemdup rather than duplicating its implementation 2019-08-14 05:02:43 -03:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile