Thanks Pavel (not Paul, I‘m sorry!),
we might be on the right track here. This patch does still trigger a kernel tracing event with usbreset after a resume from standby (and usbreset is hanging for about 2 mins), but afterwards the system is still running fine, the DVB card works again and I can reboot the machine without hangs. I’ve tried this with two reboots and attached a dmesg log.
But this only works one time, a second try with usbreset in the same uptame seems to trigger the old total block, the adapter doesn’t get alive again and a proper reboot is impossible.
Best regards
Maximilian Böhm
Am 18.12.21 um 15:23 schrieb Pavel Skripkin:
On 12/18/21 12:15, Mauro Carvalho Chehab wrote:
Em Sat, 18 Dec 2021 02:09:46 +0100
Maximilian Böhm <maximilian.boehm@xxxxxxxxxx> escreveu:
Hello Paul and the other people involved,
I’m a user of a Hauppauge WinTV dualHD DVB-T2 USB card and experiencing a bug since Linux 5.15.3 of which kernel bisecting brought me to a commit by you from Juli 29: "media: em28xx: add missing em28xx_close_extension".
So, basically this changeset: 2c98b8a3458d ("media: em28xx: add missing em28xx_close_extension")
My problem: This TV stick doesn’t work for me after a wake up from a system standby, so I have to use the little helper tool usbreset to reset its USB connection.
What such patch should be doing is to ensure that the drivers will
do the right thing when the device is removed (or unbound).
It shouldn't have been called during suspend/resume. While this bug
should be fixed, the issue with suspend/resume callbacks also seem
to require additional work.
Now, I dunno what a "usbreset" tool would be doing, but I'm assuming
that it will be doing a unbind/bind sequence.
First of all I want to apologize for introducing this bug. I don't have
any em28xx devices and I've only tested with syzbot reproducer.
I can't say much about task hung bug, because I am not an expert in
em28xx driver, but I have an idea about NULL deref (which is in attached
dmesg on bugzilla page)
[ 108.755526] BUG: kernel NULL pointer dereference, address: 0000000000000000
[ 108.755529] #PF: supervisor read access in kernel mode
[ 108.755530] #PF: error_code(0x0000) - not-present page
[ 108.755532] PGD 0 P4D 0
[ 108.755534] Oops: 0000 [#1] PREEMPT SMP NOPTI
[ 108.755535] CPU: 12 PID: 28104 Comm: usbreset Not tainted 5.16.0-rc3-1-mainline #1 5300773575872a1d8fb5e17c51f4b15320e5794c
[ 108.755538] Hardware name: System manufacturer System Product Name/ROG STRIX X570-E GAMING, BIOS 1407 02/24/2020
[ 108.755539] RIP: 0010:__list_del_entry_valid+0x25/0xc0
[ 108.755545] RSP: 0018:ffffb26a8b67bc70 EFLAGS: 00010217
[ 108.755547] RAX: dead000000000122 RBX: ffffffffc11ea000 RCX: 0000000000000000
[ 108.755548] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff92c9d82081e8
[ 108.755549] RBP: ffff92c9d8208000 R08: 0000000000000000 R09: 0000000000000000
[ 108.755550] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffc11ea0d0
[ 108.755551] R13: ffff92c9d50ea400 R14: ffff92c9d50ea430 R15: ffff92c9d50ea400
[ 108.755552] FS: 00007f9ce9bd4580(0000) GS:ffff92d0bed00000(0000) knlGS:0000000000000000
[ 108.755553] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 108.755555] CR2: 0000000000000000 CR3: 00000003cc740000 CR4: 0000000000350ee0
[ 108.755556] Call Trace:
[ 108.755558] <TASK>
[ 108.755561] em28xx_close_extension+0x64/0xb0 [em28xx e547aa2f945c8b78712225f6e5e1ca6a1015473f]
[ 108.755569] em28xx_usb_disconnect.cold+0x82/0xbb [em28xx e547aa2f945c8b78712225f6e5e1ca6a1015473f]
[ 108.755574] usb_unbind_interface+0x87/0x280
Looks like missing INIT_LIST_HEAD() somewhere, because all devices are
kzalloced.
Something like this may work
diff --git a/drivers/media/usb/em28xx/em28xx-cards.c
b/drivers/media/usb/em28xx/em28xx-cards.c
index b207f34af5c6..c303a95e845a 100644
--- a/drivers/media/usb/em28xx/em28xx-cards.c
+++ b/drivers/media/usb/em28xx/em28xx-cards.c
@@ -3936,6 +3936,7 @@ static int em28xx_usb_probe(struct usb_interface
*intf,
dev->is_audio_only = has_vendor_audio && !(has_video || has_dvb);
dev->has_video = has_video;
dev->ifnum = ifnum;
+ INIT_LIST_HEAD(&dev->devlist);
dev->ts = PRIMARY_TS;
snprintf(dev->name, 28, "em28xx");
With regards,
Pavel Skripkin
[ 48.714086] em28xx 3-6:1.0: Disconnecting em28xx #1
[ 48.714091] em28xx 3-6:1.0: Disconnecting em28xx
[ 48.714094] em28xx 3-6:1.0: Closing DVB extension
[ 48.714727] em28xx 3-6:1.0: Closing DVB extension
$ sudo /usr/bin/usbreset /dev/bus/usb/003/004
[ 245.359654] INFO: task usbreset:6276 blocked for more than 124 seconds.
[ 245.359657] Not tainted 5.15.2-1-git-00372-g2899243f272f-dirty #15
[ 245.359658] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 245.359659] task:usbreset state:D stack: 0 pid: 6276 ppid: 6264 flags:0x00004000
[ 245.359662] Call Trace:
[ 245.359663] <TASK>
[ 245.359666] __schedule+0x331/0x1540
[ 245.359671] ? dvb_unregister_device+0x1c/0x30 [dvb_core 15d9351e0e083271bc0a59b86ef1b0878266ca75]
[ 245.359678] ? dvb_net_ts_callback+0x42/0x50 [dvb_core 15d9351e0e083271bc0a59b86ef1b0878266ca75]
[ 245.359686] schedule+0x5d/0xd0
[ 245.359687] dvb_dmxdev_release+0x101/0x1a0 [dvb_core 15d9351e0e083271bc0a59b86ef1b0878266ca75]
[ 245.359694] ? do_wait_intr_irq+0xb0/0xb0
[ 245.359698] em28xx_dvb_fini.cold+0xf5/0x1ad [em28xx_dvb ba7eab8f286c229b453c3fdf88d20fdfca469b4b]
[ 245.359701] em28xx_close_extension+0x49/0xb0 [em28xx 8fe644becc0cde0cc81250fd6ae4d56311d50962]
[ 245.359706] em28xx_usb_disconnect.cold+0x71/0xbb [em28xx 8fe644becc0cde0cc81250fd6ae4d56311d50962]
[ 245.359711] usb_unbind_interface+0x87/0x280
[ 245.359713] ? kernfs_find_ns+0x35/0xe0
[ 245.359716] __device_release_driver+0x232/0x240
[ 245.359719] device_release_driver+0x24/0x30
[ 245.359721] usb_forced_unbind_intf+0x75/0xb0
[ 245.359723] usb_reset_device+0xc9/0x250
[ 245.359725] usbdev_ioctl+0xac3/0x1370
[ 245.359728] ? ksys_write+0x67/0xf0
[ 245.359730] ? syscall_exit_to_user_mode+0x23/0x50
[ 245.359732] ? do_syscall_64+0x69/0x90
[ 245.359734] __x64_sys_ioctl+0x8b/0xd0
[ 245.359737] do_syscall_64+0x59/0x90
[ 245.359739] ? exc_page_fault+0x72/0x180
[ 245.359740] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 245.359743] RIP: 0033:0x7fc75d04359b
[ 245.359744] RSP: 002b:00007ffe0e41dc88 EFLAGS: 00000206 ORIG_RAX: 0000000000000010
[ 245.359746] RAX: ffffffffffffffda RBX: 0000556dd748c290 RCX: 00007fc75d04359b
[ 245.359747] RDX: 0000000000000000 RSI: 0000000000005514 RDI: 0000000000000003
[ 245.359748] RBP: 00007ffe0e41dcb0 R08: 0000000000000000 R09: 00007fc75d0d34e0
[ 245.359749] R10: 00007fc75cf5df78 R11: 0000000000000206 R12: 0000556dd748c0a0
[ 245.359749] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 245.359751] </TASK>
[ 368.248457] INFO: task usbreset:6276 blocked for more than 247 seconds.
[ 368.248461] Not tainted 5.15.2-1-git-00372-g2899243f272f-dirty #15
[ 368.248462] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 368.248463] task:usbreset state:D stack: 0 pid: 6276 ppid: 6264 flags:0x00004000
[ 368.248466] Call Trace:
[ 368.248468] <TASK>
[ 368.248471] __schedule+0x331/0x1540
[ 368.248477] ? dvb_unregister_device+0x1c/0x30 [dvb_core 15d9351e0e083271bc0a59b86ef1b0878266ca75]
[ 368.248485] ? dvb_net_ts_callback+0x42/0x50 [dvb_core 15d9351e0e083271bc0a59b86ef1b0878266ca75]
[ 368.248493] schedule+0x5d/0xd0
[ 368.248494] dvb_dmxdev_release+0x101/0x1a0 [dvb_core 15d9351e0e083271bc0a59b86ef1b0878266ca75]
[ 368.248501] ? do_wait_intr_irq+0xb0/0xb0
[ 368.248505] em28xx_dvb_fini.cold+0xf5/0x1ad [em28xx_dvb ba7eab8f286c229b453c3fdf88d20fdfca469b4b]
[ 368.248509] em28xx_close_extension+0x49/0xb0 [em28xx 8fe644becc0cde0cc81250fd6ae4d56311d50962]
[ 368.248514] em28xx_usb_disconnect.cold+0x71/0xbb [em28xx 8fe644becc0cde0cc81250fd6ae4d56311d50962]
[ 368.248518] usb_unbind_interface+0x87/0x280
[ 368.248521] ? kernfs_find_ns+0x35/0xe0
[ 368.248524] __device_release_driver+0x232/0x240
[ 368.248527] device_release_driver+0x24/0x30
[ 368.248529] usb_forced_unbind_intf+0x75/0xb0
[ 368.248530] usb_reset_device+0xc9/0x250
[ 368.248533] usbdev_ioctl+0xac3/0x1370
[ 368.248535] ? ksys_write+0x67/0xf0
[ 368.248538] ? syscall_exit_to_user_mode+0x23/0x50
[ 368.248540] ? do_syscall_64+0x69/0x90
[ 368.248542] __x64_sys_ioctl+0x8b/0xd0
[ 368.248545] do_syscall_64+0x59/0x90
[ 368.248547] ? exc_page_fault+0x72/0x180
[ 368.248548] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 368.248550] RIP: 0033:0x7fc75d04359b
[ 368.248552] RSP: 002b:00007ffe0e41dc88 EFLAGS: 00000206 ORIG_RAX: 0000000000000010
[ 368.248554] RAX: ffffffffffffffda RBX: 0000556dd748c290 RCX: 00007fc75d04359b
[ 368.248555] RDX: 0000000000000000 RSI: 0000000000005514 RDI: 0000000000000003
[ 368.248556] RBP: 00007ffe0e41dcb0 R08: 0000000000000000 R09: 00007fc75d0d34e0
[ 368.248557] R10: 00007fc75cf5df78 R11: 0000000000000206 R12: 0000556dd748c0a0
[ 368.248558] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 368.248559] </TASK>
[ 491.128613] INFO: task usbreset:6276 blocked for more than 370 seconds.
[ 491.128617] Not tainted 5.15.2-1-git-00372-g2899243f272f-dirty #15
[ 491.128618] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 491.128619] task:usbreset state:D stack: 0 pid: 6276 ppid: 6264 flags:0x00004000
[ 491.128622] Call Trace:
[ 491.128623] <TASK>
[ 491.128626] __schedule+0x331/0x1540
[ 491.128632] ? dvb_unregister_device+0x1c/0x30 [dvb_core 15d9351e0e083271bc0a59b86ef1b0878266ca75]
[ 491.128640] ? dvb_net_ts_callback+0x42/0x50 [dvb_core 15d9351e0e083271bc0a59b86ef1b0878266ca75]
[ 491.128647] schedule+0x5d/0xd0
[ 491.128648] dvb_dmxdev_release+0x101/0x1a0 [dvb_core 15d9351e0e083271bc0a59b86ef1b0878266ca75]
[ 491.128655] ? do_wait_intr_irq+0xb0/0xb0
[ 491.128659] em28xx_dvb_fini.cold+0xf5/0x1ad [em28xx_dvb ba7eab8f286c229b453c3fdf88d20fdfca469b4b]
[ 491.128663] em28xx_close_extension+0x49/0xb0 [em28xx 8fe644becc0cde0cc81250fd6ae4d56311d50962]
[ 491.128668] em28xx_usb_disconnect.cold+0x71/0xbb [em28xx 8fe644becc0cde0cc81250fd6ae4d56311d50962]
[ 491.128673] usb_unbind_interface+0x87/0x280
[ 491.128675] ? kernfs_find_ns+0x35/0xe0
[ 491.128678] __device_release_driver+0x232/0x240
[ 491.128681] device_release_driver+0x24/0x30
[ 491.128683] usb_forced_unbind_intf+0x75/0xb0
[ 491.128685] usb_reset_device+0xc9/0x250
[ 491.128687] usbdev_ioctl+0xac3/0x1370
[ 491.128690] ? ksys_write+0x67/0xf0
[ 491.128692] ? syscall_exit_to_user_mode+0x23/0x50
[ 491.128693] ? do_syscall_64+0x69/0x90
[ 491.128696] __x64_sys_ioctl+0x8b/0xd0
[ 491.128698] do_syscall_64+0x59/0x90
[ 491.128700] ? exc_page_fault+0x72/0x180
[ 491.128702] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 491.128704] RIP: 0033:0x7fc75d04359b
[ 491.128706] RSP: 002b:00007ffe0e41dc88 EFLAGS: 00000206 ORIG_RAX: 0000000000000010
[ 491.128708] RAX: ffffffffffffffda RBX: 0000556dd748c290 RCX: 00007fc75d04359b
[ 491.128708] RDX: 0000000000000000 RSI: 0000000000005514 RDI: 0000000000000003
[ 491.128709] RBP: 00007ffe0e41dcb0 R08: 0000000000000000 R09: 00007fc75d0d34e0
[ 491.128710] R10: 00007fc75cf5df78 R11: 0000000000000206 R12: 0000556dd748c0a0
[ 491.128711] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 491.128712] </TASK>
[ 525.619615] em28xx 3-6:1.0: Freeing device
[ 525.749282] usb 3-6: reset high-speed USB device number 4 using xhci_hcd
[ 525.894041] em28xx 3-6:1.0: New device HCW dualHD @ 480 Mbps (2040:8265, interface 0, class 0)
[ 525.894048] em28xx 3-6:1.0: DVB interface 0 found: bulk
[ 525.949524] em28xx 3-6:1.0: chip ID is em28174
[ 527.158662] em28xx 3-6:1.0: EEPROM ID = 26 00 01 00, EEPROM hash = 0xc4ecc94c
[ 527.158667] em28xx 3-6:1.0: EEPROM info:
[ 527.158668] em28xx 3-6:1.0: microcode start address = 0x0004, boot configuration = 0x01
[ 527.168914] em28xx 3-6:1.0: AC97 audio (5 sample rates)
[ 527.168917] em28xx 3-6:1.0: 500mA max power
[ 527.168918] em28xx 3-6:1.0: Table at offset 0x27, strings=0x0e6a, 0x1888, 0x087e
[ 527.229270] em28xx 3-6:1.0: Identified as Hauppauge WinTV-dualHD DVB (card=99)
[ 527.229872] tveeprom: Hauppauge model 204209, rev C2I6, serial# 14109692
[ 527.229874] tveeprom: tuner model is SiLabs Si2157 (idx 186, type 4)
[ 527.229875] tveeprom: TV standards PAL(B/G) NTSC(M) PAL(I) SECAM(L/L') PAL(D/D1/K) ATSC/DVB Digital (eeprom 0xfc)
[ 527.229876] tveeprom: audio processor is None (idx 0)
[ 527.229877] tveeprom: has no radio, has IR receiver, has no IR transmitter
[ 527.229879] em28xx 3-6:1.0: dvb set to bulk mode.
[ 527.286170] em28xx 3-6:1.0: chip ID is em28174
[ 528.488683] em28xx 3-6:1.0: EEPROM ID = 26 00 01 00, EEPROM hash = 0xc4ecc94c
[ 528.488686] em28xx 3-6:1.0: EEPROM info:
[ 528.488687] em28xx 3-6:1.0: microcode start address = 0x0004, boot configuration = 0x01
[ 528.498932] em28xx 3-6:1.0: AC97 audio (5 sample rates)
[ 528.498934] em28xx 3-6:1.0: 500mA max power
[ 528.498935] em28xx 3-6:1.0: Table at offset 0x27, strings=0x0e6a, 0x1888, 0x087e
[ 528.555960] em28xx 3-6:1.0: Identified as Hauppauge WinTV-dualHD DVB (card=99)
[ 528.557089] tveeprom: Hauppauge model 204209, rev C2I6, serial# 14109692
[ 528.557091] tveeprom: tuner model is SiLabs Si2157 (idx 186, type 4)
[ 528.557092] tveeprom: TV standards PAL(B/G) NTSC(M) PAL(I) SECAM(L/L') PAL(D/D1/K) ATSC/DVB Digital (eeprom 0xfc)
[ 528.557094] tveeprom: audio processor is None (idx 0)
[ 528.557095] tveeprom: has no radio, has IR receiver, has no IR transmitter
[ 528.557097] em28xx 3-6:1.0: dvb ts2 set to bulk mode.
[ 528.757617] em28xx 3-6:1.0: Binding DVB extension
[ 528.765833] i2c i2c-12: Added multiplexed i2c bus 15
[ 528.765836] si2168 12-0064: Silicon Labs Si2168-B40 successfully identified
[ 528.765837] si2168 12-0064: firmware version: B 4.0.2
[ 528.769063] si2157 15-0060: Silicon Labs Si2147/2148/2157/2158 successfully attached
[ 528.769072] dvbdev: DVB: registering new adapter (3-6:1.0)
[ 528.769074] em28xx 3-6:1.0: DVB: registering adapter 0 frontend 0 (Silicon Labs Si2168)...
[ 528.769075] dvbdev: dvb_create_media_entity: media entity 'Silicon Labs Si2168' registered.
[ 528.769332] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered.
[ 528.769811] em28xx 3-6:1.0: DVB extension successfully initialized
[ 528.769814] em28xx 3-6:1.0: Binding DVB extension
[ 528.778583] i2c i2c-14: Added multiplexed i2c bus 16
[ 528.778587] si2168 14-0067: Silicon Labs Si2168-B40 successfully identified
[ 528.778588] si2168 14-0067: firmware version: B 4.0.2
[ 528.782185] si2157 16-0063: Silicon Labs Si2147/2148/2157/2158 successfully attached
[ 528.782192] dvbdev: DVB: registering new adapter (3-6:1.0)
[ 528.782194] em28xx 3-6:1.0: DVB: registering adapter 1 frontend 0 (Silicon Labs Si2168)...
[ 528.782196] dvbdev: dvb_create_media_entity: media entity 'Silicon Labs Si2168' registered.
[ 528.782426] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered.
[ 528.782860] em28xx 3-6:1.0: DVB extension successfully initialized
[ 528.782863] em28xx 3-6:1.0: Registering input extension
[ 528.783935] Registered IR keymap rc-hauppauge
[ 528.785070] rc rc0: Hauppauge WinTV-dualHD DVB as /devices/pci0000:00/0000:00:01.2/0000:02:00.0/0000:03:08.0/0000:06:00.3/usb3/3-6/3-6:1.0/rc/rc0
[ 528.785092] rc rc0: lirc_dev: driver em28xx registered at minor = 0, scancode receiver, no transmitter
[ 528.785115] input: Hauppauge WinTV-dualHD DVB as /devices/pci0000:00/0000:00:01.2/0000:02:00.0/0000:03:08.0/0000:06:00.3/usb3/3-6/3-6:1.0/rc/rc0/input24
[ 528.785134] em28xx 3-6:1.0: Input extension successfully initialized
[ 528.785135] em28xx 3-6:1.0: Remote control support is not available for this card.
[ 528.872451] si2168 12-0064: downloading firmware from file 'dvb-demod-si2168-b40-01.fw'
[ 529.579701] si2168 12-0064: firmware version: B 4.0.11
[ 529.595321] si2157 15-0060: found a 'Silicon Labs Si2157-A30'
[ 529.625072] si2157 15-0060: firmware version: 3.0.5
[ 529.638970] em28xx 3-6:1.0: DVB: adapter 0 frontend 0 frequency 0 out of range (48000000..870000000)
[ 529.652594] si2168 14-0067: downloading firmware from file 'dvb-demod-si2168-b40-01.fw'
[ 529.682950] si2157 15-0060: found a 'Silicon Labs Si2157-A30'
[ 529.720323] si2157 15-0060: firmware version: 3.0.5
[ 530.394083] si2168 14-0067: firmware version: B 4.0.11
[ 530.409962] si2157 16-0063: found a 'Silicon Labs Si2157-A30'
[ 530.438837] si2157 16-0063: firmware version: 3.0.5
[ 530.452720] em28xx 3-6:1.0: DVB: adapter 1 frontend 0 frequency 0 out of range (48000000..870000000)
[ 530.478835] si2157 16-0063: found a 'Silicon Labs Si2157-A30'
[ 530.508209] si2157 16-0063: firmware version: 3.0.5
[ 1351.282178] INFO: task usbreset:531202 blocked for more than 491 seconds.
[ 1351.282181] Tainted: G W 5.15.2-1-git-00372-g2899243f272f-dirty #15
[ 1351.282182] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1351.282182] task:usbreset state:D stack: 0 pid:531202 ppid:531194 flags:0x00004000
[ 1351.282185] Call Trace:
[ 1351.282187] <TASK>
[ 1351.282189] __schedule+0x331/0x1540
[ 1351.282195] ? dvb_unregister_device+0x1c/0x30 [dvb_core 15d9351e0e083271bc0a59b86ef1b0878266ca75]
[ 1351.282202] ? dvb_net_ts_callback+0x42/0x50 [dvb_core 15d9351e0e083271bc0a59b86ef1b0878266ca75]
[ 1351.282210] schedule+0x5d/0xd0
[ 1351.282211] dvb_dmxdev_release+0x101/0x1a0 [dvb_core 15d9351e0e083271bc0a59b86ef1b0878266ca75]
[ 1351.282218] ? do_wait_intr_irq+0xb0/0xb0
[ 1351.282221] em28xx_dvb_fini.cold+0xf5/0x1ad [em28xx_dvb ba7eab8f286c229b453c3fdf88d20fdfca469b4b]
[ 1351.282225] em28xx_close_extension+0x49/0xb0 [em28xx 8fe644becc0cde0cc81250fd6ae4d56311d50962]
[ 1351.282230] em28xx_usb_disconnect.cold+0x71/0xbb [em28xx 8fe644becc0cde0cc81250fd6ae4d56311d50962]
[ 1351.282235] usb_unbind_interface+0x87/0x280
[ 1351.282238] ? kernfs_find_ns+0x35/0xe0
[ 1351.282241] __device_release_driver+0x232/0x240
[ 1351.282244] device_release_driver+0x24/0x30
[ 1351.282246] usb_forced_unbind_intf+0x75/0xb0
[ 1351.282247] usb_reset_device+0xc9/0x250
[ 1351.282250] usbdev_ioctl+0xac3/0x1370
[ 1351.282252] ? new_sync_write+0x159/0x200
[ 1351.282255] __x64_sys_ioctl+0x8b/0xd0
[ 1351.282257] do_syscall_64+0x59/0x90
[ 1351.282260] ? vfs_write+0x203/0x2a0
[ 1351.282261] ? ksys_write+0x67/0xf0
[ 1351.282263] ? syscall_exit_to_user_mode+0x23/0x50
[ 1351.282265] ? do_syscall_64+0x69/0x90
[ 1351.282266] ? do_user_addr_fault+0x20b/0x6b0
[ 1351.282269] ? do_syscall_64+0x69/0x90
[ 1351.282271] ? exc_page_fault+0x72/0x180
[ 1351.282272] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 1351.282274] RIP: 0033:0x7f80f597259b
[ 1351.282276] RSP: 002b:00007ffeee9548c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010
[ 1351.282278] RAX: ffffffffffffffda RBX: 00005638a2368290 RCX: 00007f80f597259b
[ 1351.282279] RDX: 0000000000000000 RSI: 0000000000005514 RDI: 0000000000000003
[ 1351.282280] RBP: 00007ffeee9548f0 R08: 0000000000000000 R09: 00007f80f5a024e0
[ 1351.282281] R10: 00007f80f588cf78 R11: 0000000000000202 R12: 00005638a23680a0
[ 1351.282281] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 1351.282283] </TASK>
[ 1474.162912] INFO: task usbreset:531202 blocked for more than 614 seconds.
[ 1474.162916] Tainted: G W 5.15.2-1-git-00372-g2899243f272f-dirty #15
[ 1474.162917] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1474.162918] task:usbreset state:D stack: 0 pid:531202 ppid:531194 flags:0x00004000
[ 1474.162921] Call Trace:
[ 1474.162922] <TASK>
[ 1474.162925] __schedule+0x331/0x1540
[ 1474.162931] ? dvb_unregister_device+0x1c/0x30 [dvb_core 15d9351e0e083271bc0a59b86ef1b0878266ca75]
[ 1474.162939] ? dvb_net_ts_callback+0x42/0x50 [dvb_core 15d9351e0e083271bc0a59b86ef1b0878266ca75]
[ 1474.162947] schedule+0x5d/0xd0
[ 1474.162948] dvb_dmxdev_release+0x101/0x1a0 [dvb_core 15d9351e0e083271bc0a59b86ef1b0878266ca75]
[ 1474.162955] ? do_wait_intr_irq+0xb0/0xb0
[ 1474.162959] em28xx_dvb_fini.cold+0xf5/0x1ad [em28xx_dvb ba7eab8f286c229b453c3fdf88d20fdfca469b4b]
[ 1474.162963] em28xx_close_extension+0x49/0xb0 [em28xx 8fe644becc0cde0cc81250fd6ae4d56311d50962]
[ 1474.162968] em28xx_usb_disconnect.cold+0x71/0xbb [em28xx 8fe644becc0cde0cc81250fd6ae4d56311d50962]
[ 1474.162973] usb_unbind_interface+0x87/0x280
[ 1474.162975] ? kernfs_find_ns+0x35/0xe0
[ 1474.162979] __device_release_driver+0x232/0x240
[ 1474.162982] device_release_driver+0x24/0x30
[ 1474.162984] usb_forced_unbind_intf+0x75/0xb0
[ 1474.162985] usb_reset_device+0xc9/0x250
[ 1474.162988] usbdev_ioctl+0xac3/0x1370
[ 1474.162991] ? new_sync_write+0x159/0x200
[ 1474.162993] __x64_sys_ioctl+0x8b/0xd0
[ 1474.162996] do_syscall_64+0x59/0x90
[ 1474.162998] ? vfs_write+0x203/0x2a0
[ 1474.163000] ? ksys_write+0x67/0xf0
[ 1474.163001] ? syscall_exit_to_user_mode+0x23/0x50
[ 1474.163002] ? do_syscall_64+0x69/0x90
[ 1474.163004] ? do_user_addr_fault+0x20b/0x6b0
[ 1474.163007] ? do_syscall_64+0x69/0x90
[ 1474.163009] ? exc_page_fault+0x72/0x180
[ 1474.163010] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 1474.163012] RIP: 0033:0x7f80f597259b
[ 1474.163014] RSP: 002b:00007ffeee9548c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010
[ 1474.163015] RAX: ffffffffffffffda RBX: 00005638a2368290 RCX: 00007f80f597259b
[ 1474.163016] RDX: 0000000000000000 RSI: 0000000000005514 RDI: 0000000000000003
[ 1474.163017] RBP: 00007ffeee9548f0 R08: 0000000000000000 R09: 00007f80f5a024e0
[ 1474.163018] R10: 00007f80f588cf78 R11: 0000000000000202 R12: 00005638a23680a0
[ 1474.163019] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 1474.163021] </TASK>
