------------[ cut here ]------------
sysfs group 'power' not found for kobject 'dvb2.dvr0'
WARNING: CPU: 0 PID: 9931 at fs/sysfs/group.c:281 sysfs_remove_group+0x1d7/0x610 fs/sysfs/group.c:279
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 9931 Comm: kworker/0:7 Not tainted 5.8.0-rc5-syzkaller #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+0x21c/0x280 lib/dump_stack.c:118
 panic+0x4d7/0xef7 kernel/panic.c:231
 __warn+0x416/0x6a0 kernel/panic.c:600
 report_bug+0x7d4/0x9d0 lib/bug.c:198
 handle_bug+0x6c/0xd0 arch/x86/kernel/traps.c:235
 exc_invalid_op+0x34/0x80 arch/x86/kernel/traps.c:255
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:548
RIP: 0010:sysfs_remove_group+0x1d7/0x610 fs/sysfs/group.c:279
Code: 20 48 09 c8 49 89 87 70 09 00 00 49 c7 87 80 0c 00 00 00 00 00 00 48 c7 c7 05 e8 e1 91 4c 89 e6 4c 89 f2 31 c0 e8 b9 98 cb fe <0f> 0b e9 00 04 00 00 8b 7d 9c e8 4a 79 9b ff e9 68 fe ff ff 8b 7d
RSP: 0018:ffff8880949cb1b8 EFLAGS: 00010246
RAX: 08d56ef29e28cf00 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8880949cb220 R08: ffffffff81a2d8ea R09: ffff88812fffa000
R10: 0000000000000004 R11: 00000000ffffff00 R12: ffffffff91639728
R13: 0000000000000000 R14: ffff8880aee486b0 R15: ffff8880af9fa858
 dpm_sysfs_remove+0x123/0x160 drivers/base/power/sysfs.c:794
 device_del+0x391/0x2320 drivers/base/core.c:2834
 device_unregister drivers/base/core.c:2889 [inline]
 device_destroy+0x10d/0x170 drivers/base/core.c:3435
 dvb_remove_device drivers/media/dvb-core/dvbdev.c:563 [inline]
 dvb_unregister_device+0x12e/0x3b0 drivers/media/dvb-core/dvbdev.c:583
 dvb_dmxdev_release+0x74e/0x870 drivers/media/dvb-core/dmxdev.c:1460
 ttusb_disconnect+0x214/0x5f0 drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c:1768
 usb_unbind_interface+0x43f/0x1070 drivers/usb/core/driver.c:436
 __device_release_driver drivers/base/dd.c:1113 [inline]
 device_release_driver_internal+0x97d/0xe20 drivers/base/dd.c:1144
 device_release_driver+0x4b/0x60 drivers/base/dd.c:1167
 bus_remove_device+0x5dc/0x6a0 drivers/base/bus.c:533
 device_del+0xfae/0x2320 drivers/base/core.c:2857
 usb_disable_device+0x5d9/0x1520 drivers/usb/core/message.c:1245
 usb_disconnect+0x5bb/0xea0 drivers/usb/core/hub.c:2217
 hub_port_connect drivers/usb/core/hub.c:5059 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5348 [inline]
 port_event drivers/usb/core/hub.c:5494 [inline]
 hub_event+0x3f26/0x8a70 drivers/usb/core/hub.c:5576
 process_one_work+0x1688/0x2140 kernel/workqueue.c:2269
 process_scheduled_works kernel/workqueue.c:2331 [inline]
 worker_thread+0x128c/0x2730 kernel/workqueue.c:2417
 kthread+0x551/0x590 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
=====================================================
BUG: KMSAN: uninit-value in number+0x807/0x2510 lib/vsprintf.c:460
CPU: 0 PID: 9931 Comm: kworker/0:7 Not tainted 5.8.0-rc5-syzkaller #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+0x1e5/0x280 lib/dump_stack.c:118
 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121
 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
 number+0x807/0x2510 lib/vsprintf.c:460
 vsnprintf+0x2276/0x35c0 lib/vsprintf.c:2686
 vscnprintf+0xbe/0x1c0 lib/vsprintf.c:2723
 vprintk_store+0xf5/0x1440 kernel/printk/printk.c:1943
 vprintk_emit+0x300/0x990 kernel/printk/printk.c:2010
 vprintk_default+0x90/0xa0 kernel/printk/printk.c:2046
 vprintk_func+0x2f7/0x300 kernel/printk/printk_safe.c:393
 printk+0x18b/0x1d3 kernel/printk/printk.c:2077
 __show_regs+0x358/0xef0 arch/x86/kernel/process_64.c:81
 show_regs_if_on_stack arch/x86/kernel/dumpstack.c:149 [inline]
 show_trace_log_lvl+0xbd5/0x11d0 arch/x86/kernel/dumpstack.c:274
 show_stack+0x122/0x190 arch/x86/kernel/dumpstack.c:294
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:118
 panic+0x4d7/0xef7 kernel/panic.c:231
 __warn+0x416/0x6a0 kernel/panic.c:600
 report_bug+0x7d4/0x9d0 lib/bug.c:198
 handle_bug+0x6c/0xd0 arch/x86/kernel/traps.c:235
 exc_invalid_op+0x34/0x80 arch/x86/kernel/traps.c:255
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:548
RIP: 0010:sysfs_remove_group+0x1d7/0x610 fs/sysfs/group.c:279
Code: 20 48 09 c8 49 89 87 70 09 00 00 49 c7 87 80 0c 00 00 00 00 00 00 48 c7 c7 05 e8 e1 91 4c 89 e6 4c 89 f2 31 c0 e8 b9 98 cb fe <0f> 0b e9 00 04 00 00 8b 7d 9c e8 4a 79 9b ff e9 68 fe ff ff 8b 7d
RSP: 0018:ffff8880949cb1b8 EFLAGS: 00010246
RAX: 08d56ef29e28cf00 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8880949cb220 R08: ffffffff81a2d8ea R09: ffff88812fffa000
R10: 0000000000000004 R11: 00000000ffffff00 R12: ffffffff91639728
R13: 0000000000000000 R14: ffff8880aee486b0 R15: ffff8880af9fa858
 dpm_sysfs_remove+0x123/0x160 drivers/base/power/sysfs.c:794
 device_del+0x391/0x2320 drivers/base/core.c:2834
 device_unregister drivers/base/core.c:2889 [inline]
 device_destroy+0x10d/0x170 drivers/base/core.c:3435
 dvb_remove_device drivers/media/dvb-core/dvbdev.c:563 [inline]
 dvb_unregister_device+0x12e/0x3b0 drivers/media/dvb-core/dvbdev.c:583
 dvb_dmxdev_release+0x74e/0x870 drivers/media/dvb-core/dmxdev.c:1460
 ttusb_disconnect+0x214/0x5f0 drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c:1768
 usb_unbind_interface+0x43f/0x1070 drivers/usb/core/driver.c:436
 __device_release_driver drivers/base/dd.c:1113 [inline]
 device_release_driver_internal+0x97d/0xe20 drivers/base/dd.c:1144
 device_release_driver+0x4b/0x60 drivers/base/dd.c:1167
 bus_remove_device+0x5dc/0x6a0 drivers/base/bus.c:533
 device_del+0xfae/0x2320 drivers/base/core.c:2857
 usb_disable_device+0x5d9/0x1520 drivers/usb/core/message.c:1245
 usb_disconnect+0x5bb/0xea0 drivers/usb/core/hub.c:2217
 hub_port_connect drivers/usb/core/hub.c:5059 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5348 [inline]
 port_event drivers/usb/core/hub.c:5494 [inline]
 hub_event+0x3f26/0x8a70 drivers/usb/core/hub.c:5576
 process_one_work+0x1688/0x2140 kernel/workqueue.c:2269
 process_scheduled_works kernel/workqueue.c:2331 [inline]
 worker_thread+0x128c/0x2730 kernel/workqueue.c:2417
 kthread+0x551/0x590 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293

Local variable ----tmp@number created at:
 number+0xac/0x2510 lib/vsprintf.c:423
 number+0xac/0x2510 lib/vsprintf.c:423
=====================================================
=====================================================
BUG: KMSAN: uninit-value in number+0x81b/0x2510 lib/vsprintf.c:461
CPU: 0 PID: 9931 Comm: kworker/0:7 Tainted: G    B             5.8.0-rc5-syzkaller #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+0x1e5/0x280 lib/dump_stack.c:118
 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121
 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
 number+0x81b/0x2510 lib/vsprintf.c:461
 vsnprintf+0x2276/0x35c0 lib/vsprintf.c:2686
 vscnprintf+0xbe/0x1c0 lib/vsprintf.c:2723
 vprintk_store+0xf5/0x1440 kernel/printk/printk.c:1943
 vprintk_emit+0x300/0x990 kernel/printk/printk.c:2010
 vprintk_default+0x90/0xa0 kernel/printk/printk.c:2046
 vprintk_func+0x2f7/0x300 kernel/printk/printk_safe.c:393
 printk+0x18b/0x1d3 kernel/printk/printk.c:2077
 __show_regs+0x358/0xef0 arch/x86/kernel/process_64.c:81
 show_regs_if_on_stack arch/x86/kernel/dumpstack.c:149 [inline]
 show_trace_log_lvl+0xbd5/0x11d0 arch/x86/kernel/dumpstack.c:274
 show_stack+0x122/0x190 arch/x86/kernel/dumpstack.c:294
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:118
 panic+0x4d7/0xef7 kernel/panic.c:231
 __warn+0x416/0x6a0 kernel/panic.c:600
 report_bug+0x7d4/0x9d0 lib/bug.c:198
 handle_bug+0x6c/0xd0 arch/x86/kernel/traps.c:235
 exc_invalid_op+0x34/0x80 arch/x86/kernel/traps.c:255
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:548
RIP: 0010:sysfs_remove_group+0x1d7/0x610 fs/sysfs/group.c:279
Code: 20 48 09 c8 49 89 87 70 09 00 00 49 c7 87 80 0c 00 00 00 00 00 00 48 c7 c7 05 e8 e1 91 4c 89 e6 4c 89 f2 31 c0 e8 b9 98 cb fe <0f> 0b e9 00 04 00 00 8b 7d 9c e8 4a 79 9b ff e9 68 fe ff ff 8b 7d
RSP: 0018:ffff8880949cb1b8 EFLAGS: 00010246
RAX: 08d56ef29e28cf00 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8880949cb220 R08: ffffffff81a2d8ea R09: ffff88812fffa000
R10: 0000000000000004 R11: 00000000ffffff00 R12: ffffffff91639728
R13: 0000000000000000 R14: ffff8880aee486b0 R15: ffff8880af9fa858
 dpm_sysfs_remove+0x123/0x160 drivers/base/power/sysfs.c:794
 device_del+0x391/0x2320 drivers/base/core.c:2834
 device_unregister drivers/base/core.c:2889 [inline]
 device_destroy+0x10d/0x170 drivers/base/core.c:3435
 dvb_remove_device drivers/media/dvb-core/dvbdev.c:563 [inline]
 dvb_unregister_device+0x12e/0x3b0 drivers/media/dvb-core/dvbdev.c:583
 dvb_dmxdev_release+0x74e/0x870 drivers/media/dvb-core/dmxdev.c:1460
 ttusb_disconnect+0x214/0x5f0 drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c:1768
 usb_unbind_interface+0x43f/0x1070 drivers/usb/core/driver.c:436
 __device_release_driver drivers/base/dd.c:1113 [inline]
 device_release_driver_internal+0x97d/0xe20 drivers/base/dd.c:1144
 device_release_driver+0x4b/0x60 drivers/base/dd.c:1167
 bus_remove_device+0x5dc/0x6a0 drivers/base/bus.c:533
 device_del+0xfae/0x2320 drivers/base/core.c:2857
 usb_disable_device+0x5d9/0x1520 drivers/usb/core/message.c:1245
 usb_disconnect+0x5bb/0xea0 drivers/usb/core/hub.c:2217
 hub_port_connect drivers/usb/core/hub.c:5059 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5348 [inline]
 port_event drivers/usb/core/hub.c:5494 [inline]
 hub_event+0x3f26/0x8a70 drivers/usb/core/hub.c:5576
 process_one_work+0x1688/0x2140 kernel/workqueue.c:2269
 process_scheduled_works kernel/workqueue.c:2331 [inline]
 worker_thread+0x128c/0x2730 kernel/workqueue.c:2417
 kthread+0x551/0x590 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293

Local variable ----tmp@number created at:
 number+0xac/0x2510 lib/vsprintf.c:423
 number+0xac/0x2510 lib/vsprintf.c:423
=====================================================
=====================================================
BUG: KMSAN: uninit-value in number+0x807/0x2510 lib/vsprintf.c:460
CPU: 0 PID: 9931 Comm: kworker/0:7 Tainted: G    B             5.8.0-rc5-syzkaller #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+0x1e5/0x280 lib/dump_stack.c:118
 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121
 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
 number+0x807/0x2510 lib/vsprintf.c:460
 vsnprintf+0x2276/0x35c0 lib/vsprintf.c:2686
 vscnprintf+0xbe/0x1c0 lib/vsprintf.c:2723
 vprintk_store+0xf5/0x1440 kernel/printk/printk.c:1943
 vprintk_emit+0x300/0x990 kernel/printk/printk.c:2010
 vprintk_default+0x90/0xa0 kernel/printk/printk.c:2046
 vprintk_func+0x2f7/0x300 kernel/printk/printk_safe.c:393
 printk+0x18b/0x1d3 kernel/printk/printk.c:2077
 __show_regs+0x358/0xef0 arch/x86/kernel/process_64.c:81
 show_regs_if_on_stack arch/x86/kernel/dumpstack.c:149 [inline]
 show_trace_log_lvl+0xbd5/0x11d0 arch/x86/kernel/dumpstack.c:274
 show_stack+0x122/0x190 arch/x86/kernel/dumpstack.c:294
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:118
 panic+0x4d7/0xef7 kernel/panic.c:231
 __warn+0x416/0x6a0 kernel/panic.c:600
 report_bug+0x7d4/0x9d0 lib/bug.c:198
 handle_bug+0x6c/0xd0 arch/x86/kernel/traps.c:235
 exc_invalid_op+0x34/0x80 arch/x86/kernel/traps.c:255
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:548
RIP: 0010:sysfs_remove_group+0x1d7/0x610 fs/sysfs/group.c:279
Code: 20 48 09 c8 49 89 87 70 09 00 00 49 c7 87 80 0c 00 00 00 00 00 00 48 c7 c7 05 e8 e1 91 4c 89 e6 4c 89 f2 31 c0 e8 b9 98 cb fe <0f> 0b e9 00 04 00 00 8b 7d 9c e8 4a 79 9b ff e9 68 fe ff ff 8b 7d
RSP: 0018:ffff8880949cb1b8 EFLAGS: 00010246
RAX: 08d56ef29e28cf00 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8880949cb220 R08: ffffffff81a2d8ea R09: ffff88812fffa000
R10: 0000000000000004 R11: 00000000ffffff00 R
Lost 3163 message(s)!
Kernel Offset: disabled
Rebooting in 86400 seconds..