INFO: task kworker/1:7:7308 blocked for more than 143 seconds.
Not tainted 5.18.0-rc1-syzkaller-00005-gaef11279888c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:7 state:D stack:22584 pid: 7308 ppid: 2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5073 [inline]
__schedule+0x93c/0x25d0 kernel/sched/core.c:6382
schedule+0xd2/0x1f0 kernel/sched/core.c:6454
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6513
__mutex_lock_common kernel/locking/mutex.c:673 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
unregister_netdev+0xe/0x20 net/core/dev.c:10809
usbnet_disconnect+0x139/0x270 drivers/net/usb/usbnet.c:1623
usb_unbind_interface+0x1d8/0x8e0 drivers/usb/core/driver.c:458
device_remove drivers/base/dd.c:531 [inline]
device_remove+0x11f/0x170 drivers/base/dd.c:523
__device_release_driver drivers/base/dd.c:1199 [inline]
device_release_driver_internal+0x4a3/0x680 drivers/base/dd.c:1222
bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:529
device_del+0x4f3/0xc80 drivers/base/core.c:3592
usb_disable_device+0x35b/0x7b0 drivers/usb/core/message.c:1419
usb_disconnect.cold+0x278/0x6ec drivers/usb/core/hub.c:2228
hub_port_connect drivers/usb/core/hub.c:5207 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5507 [inline]
port_event drivers/usb/core/hub.c:5665 [inline]
hub_event+0x1e74/0x4680 drivers/usb/core/hub.c:5747
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2ef/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
Showing all locks held in the system:
6 locks held by kworker/0:0/6:
#0:
ffff888109bb9538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
ffff888109bb9538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
ffff888109bb9538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
ffff888109bb9538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
ffff888109bb9538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
ffff888109bb9538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1:
ffffc9000006fda8 ((work_completion)(&hub->events)){+.+.}-{0:0}
, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff88810f086220
(&dev->mutex
){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
){....}-{3:3}, at: hub_event+0x1c1/0x4680 drivers/usb/core/hub.c:5693
#3: ffff88810cb0f220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
#3: ffff88810cb0f220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:944
#4: ffff88810cb0a1a8
(&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
(&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:944
#5: ffffffff88ab0728 (rtnl_mutex){+.+.}-{3:3}
, at: register_netdev+0x11/0x50 net/core/dev.c:10085
3 locks held by kworker/0:1/12:
#0: ffff888110045d38
(
(wq_completion)ipv6_addrconf
){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc900000cfda8 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}
, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffffffff88ab0728 (rtnl_mutex){+.+.}-{3:3}
, at: addrconf_verify_work+0xe/0x20 net/ipv6/addrconf.c:4603
3 locks held by kworker/1:0/20:
#0: ffff888110045d38
((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000015fda8
((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffffffff88ab0728 (rtnl_mutex){+.+.}-{3:3}
, at: addrconf_verify_work+0xe/0x20 net/ipv6/addrconf.c:4603
1 lock held by khungtaskd/26:
#0: ffffffff87a91440
(rcu_read_lock
){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6467
1 lock held by dhcpcd/1210:
2 locks held by getty/1232:
#0:
ffff888110c10098 (&tty->ldisc_sem){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1:
ffffc900000432e8 (&ldata->atomic_read_lock){+.+.}-{3:3}
, at: n_tty_read+0xcea/0x1230 drivers/tty/n_tty.c:2075
6 locks held by kworker/1:7/7308:
#0: ffff888109bb9538
((wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
, at: set_work_data kernel/workqueue.c:636 [inline]
, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc90001fbfda8
((work_completion)(&hub->events)
){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff88810eff6220 (&dev->mutex
){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
){....}-{3:3}, at: hub_event+0x1c1/0x4680 drivers/usb/core/hub.c:5693
#3: ffff8881162b2220
(&dev->mutex
){....}-{3:3}
, at: device_lock include/linux/device.h:767 [inline]
, at: usb_disconnect.cold+0x43/0x6ec drivers/usb/core/hub.c:2219
#4: ffff888109c601a8 (&dev->mutex
){....}-{3:3}
, at: device_lock include/linux/device.h:767 [inline]
, at: __device_driver_lock drivers/base/dd.c:1032 [inline]
, at: device_release_driver_internal+0xa0/0x680 drivers/base/dd.c:1219
#5: ffffffff88ab0728 (rtnl_mutex){+.+.}-{3:3}
, at: unregister_netdev+0xe/0x20 net/core/dev.c:10809
6 locks held by kworker/1:10/7368:
#0:
ffff888109bb9538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
ffff888109bb9538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
ffff888109bb9538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
ffff888109bb9538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
ffff888109bb9538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
ffff888109bb9538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc900026cfda8 ((work_completion)(&hub->events)
){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff88810e705220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
#2: ffff88810e705220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4680 drivers/usb/core/hub.c:5693
#3: ffff88810ff50220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
#3: ffff88810ff50220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:944
#4: ffff8881095ed1a8 (&dev->mutex
){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:944
#5: ffffffff88ab0728
(rtnl_mutex
){+.+.}-{3:3}, at: register_netdev+0x11/0x50 net/core/dev.c:10085
3 locks held by udevd/22587:
#0: ffff888110c83888 (
&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:198 [inline]
&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x189/0x6f0 fs/kernfs/file.c:237
#1: ffff88811da541d8
(
kn->active#45
){++++}-{0:0}
, at: kernfs_file_read_iter fs/kernfs/file.c:199 [inline]
, at: kernfs_fop_read_iter+0x1ac/0x6f0 fs/kernfs/file.c:237
#2: ffff88810ff50220 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:772 [inline]
#2: ffff88810ff50220 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:873
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.18.0-rc1-syzkaller-00005-gaef11279888c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:369
kthread+0x2ef/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4712 Comm: kworker/0:6 Not tainted 5.18.0-rc1-syzkaller-00005-gaef11279888c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events legacy_dvb_usb_read_remote_control
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x78/0x80 kernel/kcov.c:275
Code: 72 27 41 0f b6 fb 41 0f b6 c9 48 83 c2 01 48 c7 44 30 e0 01 00 00 00 48 89 7c 30 e8 48 89 4c 30 f0 4c 89 54 d8 20 48 89 10 5b <c3> 0f 1f 80 00 00 00 00 53 41 89 fb 41 89 f1 bf 03 00 00 00 65 48
RSP: 0018:ffffc900041b7540 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 000000000000006c RCX: ffff88810ccb8000
RDX: 0000000000000000 RSI: ffff88810ccb8000 RDI: 0000000000000003
RBP: ffffc900041b7660 R08: 0000000000000009 R09: 000000000000006c
R10: ffffffff8224dc81 R11: 000000000000002e R12: ffffffff86483d03
R13: ffffffff86483d01 R14: 1ffff92000836eac R15: 0000000000000035
FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555555f77b38 CR3: 000000010cc6d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
format_decode+0x2f1/0xad0 lib/vsprintf.c:2584
vsnprintf+0x155/0x1660 lib/vsprintf.c:2758
sprintf+0xc0/0x100 lib/vsprintf.c:3010
print_time kernel/printk/printk.c:1274 [inline]
info_print_prefix+0x248/0x340 kernel/printk/printk.c:1300
record_print_text+0x14d/0x3e0 kernel/printk/printk.c:1349
console_unlock+0x333/0xdd0 kernel/printk/printk.c:2755
vprintk_emit+0x1b4/0x5f0 kernel/printk/printk.c:2272
vprintk+0x80/0x90 kernel/printk/printk_safe.c:50
_printk+0xba/0xed kernel/printk/printk.c:2293
m920x_read drivers/media/usb/dvb-usb/m920x.c:40 [inline]
m920x_rc_query.cold+0x2d/0x32 drivers/media/usb/dvb-usb/m920x.c:188
legacy_dvb_usb_read_remote_control+0xf2/0x530 drivers/media/usb/dvb-usb/dvb-usb-remote.c:123
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2ef/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
----------------
Code disassembly (best guess):
0: 72 27 jb 0x29
2: 41 0f b6 fb movzbl %r11b,%edi
6: 41 0f b6 c9 movzbl %r9b,%ecx
a: 48 83 c2 01 add $0x1,%rdx
e: 48 c7 44 30 e0 01 00 movq $0x1,-0x20(%rax,%rsi,1)
15: 00 00
17: 48 89 7c 30 e8 mov %rdi,-0x18(%rax,%rsi,1)
1c: 48 89 4c 30 f0 mov %rcx,-0x10(%rax,%rsi,1)
21: 4c 89 54 d8 20 mov %r10,0x20(%rax,%rbx,8)
26: 48 89 10 mov %rdx,(%rax)
29: 5b pop %rbx
* 2a: c3 retq <-- trapping instruction
2b: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
32: 53 push %rbx
33: 41 89 fb mov %edi,%r11d
36: 41 89 f1 mov %esi,%r9d
39: bf 03 00 00 00 mov $0x3,%edi
3e: 65 gs
3f: 48 rex.W