INFO: task kworker/1:0:24702 blocked for more than 143 seconds.
Not tainted 5.17.0-rc4-syzkaller-00081-ga5d847b0afd3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:0 state:D stack:23000 pid:24702 ppid: 2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:4987 [inline]
__schedule+0x931/0x22e0 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428
__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:10473
usbnet_disconnect+0x139/0x270 drivers/net/usb/usbnet.c:1623
usb_unbind_interface+0x1d8/0x8e0 drivers/usb/core/driver.c:458
__device_release_driver+0x5d7/0x700 drivers/base/dd.c:1206
device_release_driver_internal drivers/base/dd.c:1237 [inline]
device_release_driver+0x26/0x40 drivers/base/dd.c:1260
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+0x27a/0x78e 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+0x1e39/0x44d0 drivers/usb/core/hub.c:5747
process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
worker_thread+0x657/0x1110 kernel/workqueue.c:2454
kthread+0x2ef/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Showing all locks held in the system:
1 lock held by khungtaskd/25:
#0: ffffffff87891580
(rcu_read_lock
){....}-{1:2}
, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
5 locks held by dhcpcd/1207:
2 locks held by getty/1231:
#0: ffff88810ea1b098
(&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+0xcf0/0x1230 drivers/tty/n_tty.c:2077
3 locks held by kworker/1:6/14077:
#0: ffff88810ded0138 ((wq_completion)ipv6_addrconf){+.+.}-{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:631 [inline]
, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline]
, at: process_one_work+0x890/0x1650 kernel/workqueue.c:2278
#1:
ffffc90001537db8
((addr_chk_work).work
){+.+.}-{0:0}
, at: process_one_work+0x8c4/0x1650 kernel/workqueue.c:2282
#2: ffffffff88885468 (rtnl_mutex){+.+.}-{3:3}
, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4608
4 locks held by kworker/u4:3/18955:
#0: ffff8881001c2938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8881001c2938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff8881001c2938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff8881001c2938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:631 [inline]
#0: ffff8881001c2938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline]
#0: ffff8881001c2938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x890/0x1650 kernel/workqueue.c:2278
#1: ffffc9000210fdb8
(
net_cleanup_work
){+.+.}-{0:0}, at: process_one_work+0x8c4/0x1650 kernel/workqueue.c:2282
#2: ffffffff88871810 (pernet_ops_rwsem
){++++}-{3:3}
, at: cleanup_net+0x9b/0xb00 net/core/net_namespace.c:559
#3:
ffffffff88885468 (
rtnl_mutex
){+.+.}-{3:3}, at: sit_exit_batch_net+0x88/0x750 net/ipv6/sit.c:1946
6 locks held by kworker/1:0/24702:
#0: ffff888103ffb938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888103ffb938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888103ffb938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888103ffb938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:631 [inline]
#0: ffff888103ffb938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline]
#0: ffff888103ffb938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x890/0x1650 kernel/workqueue.c:2278
#1: ffffc9000999fdb8
((work_completion)(&hub->events)
){+.+.}-{0:0}, at: process_one_work+0x8c4/0x1650 kernel/workqueue.c:2282
#2: ffff88810d1d7220 (&dev->mutex
){....}-{3:3}
, at: device_lock include/linux/device.h:767 [inline]
, at: hub_event+0x1c5/0x44d0 drivers/usb/core/hub.c:5693
#3: ffff88810028c220
(
&dev->mutex){....}-{3:3}
, at: device_lock include/linux/device.h:767 [inline]
, at: usb_disconnect.cold+0x43/0x78e drivers/usb/core/hub.c:2219
#4: ffff88810028d1a8
(&dev->mutex
){....}-{3:3}
, at: device_lock include/linux/device.h:767 [inline]
, at: __device_driver_lock drivers/base/dd.c:1033 [inline]
, at: device_release_driver_internal drivers/base/dd.c:1234 [inline]
, at: device_release_driver+0x1c/0x40 drivers/base/dd.c:1260
#5: ffffffff88885468
(rtnl_mutex
){+.+.}-{3:3}
, at: unregister_netdev+0xe/0x20 net/core/dev.c:10473
1 lock held by syz-executor.1/6465:
#0:
ffffffff88885468
(rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
, at: rtnetlink_rcv_msg+0x3be/0xb80 net/core/rtnetlink.c:5591
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 25 Comm: khungtaskd Not tainted 5.17.0-rc4-syzkaller-00081-ga5d847b0afd3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__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:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4072 Comm: kworker/0:3 Not tainted 5.17.0-rc4-syzkaller-00081-ga5d847b0afd3 #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:check_kcov_mode+0x9/0x40 kernel/kcov.c:166
Code: 59 fe ff ff 48 8b 7c 24 08 e8 83 3c 2f 00 e9 61 fd ff ff cc cc cc cc cc cc cc cc cc cc cc cc cc cc 65 8b 05 d9 6e be 7e 89 c2 <81> e2 00 01 00 00 a9 00 01 ff 00 74 10 31 c0 85 d2 74 15 8b 96 bc
RSP: 0018:ffffc90001847538 EFLAGS: 00000293
RAX: 0000000080000001 RBX: ffffffff86284820 RCX: ffff888132880000
RDX: 0000000080000001 RSI: ffff888132880000 RDI: 0000000000000003
RBP: ffffc90001847668 R08: 000000007fffffff R09: 0000000000000025
R10: ffffffff8216f5fb R11: 0000000000000025 R12: dffffc0000000000
R13: ffffffff86284820 R14: 1ffff92000308ead R15: 0000000000000025
FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f43b0005ce4 CR3: 000000010d5ed000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
write_comp_data kernel/kcov.c:221 [inline]
__sanitizer_cov_trace_const_cmp1+0x22/0x80 kernel/kcov.c:273
format_decode+0x19b/0xad0 lib/vsprintf.c:2530
vsnprintf+0x155/0x1660 lib/vsprintf.c:2747
snprintf+0xbb/0xf0 lib/vsprintf.c:2928
print_caller kernel/printk/printk.c:1270 [inline]
info_print_prefix+0x11c/0x340 kernel/printk/printk.c:1289
record_print_text+0x14d/0x3e0 kernel/printk/printk.c:1336
console_unlock+0x2d8/0xb70 kernel/printk/printk.c:2692
vprintk_emit+0x198/0x4f0 kernel/printk/printk.c:2245
vprintk+0x80/0x90 kernel/printk/printk_safe.c:50
_printk+0xba/0xed kernel/printk/printk.c:2266
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+0x9ac/0x1650 kernel/workqueue.c:2307
worker_thread+0x657/0x1110 kernel/workqueue.c:2454
kthread+0x2ef/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess), 3 bytes skipped:
0: ff 48 8b decl -0x75(%rax)
3: 7c 24 jl 0x29
5: 08 e8 or %ch,%al
7: 83 3c 2f 00 cmpl $0x0,(%rdi,%rbp,1)
b: e9 61 fd ff ff jmpq 0xfffffd71
10: cc int3
11: cc int3
12: cc int3
13: cc int3
14: cc int3
15: cc int3
16: cc int3
17: cc int3
18: cc int3
19: cc int3
1a: cc int3
1b: cc int3
1c: cc int3
1d: cc int3
1e: 65 8b 05 d9 6e be 7e mov %gs:0x7ebe6ed9(%rip),%eax # 0x7ebe6efe
25: 89 c2 mov %eax,%edx
* 27: 81 e2 00 01 00 00 and $0x100,%edx <-- trapping instruction
2d: a9 00 01 ff 00 test $0xff0100,%eax
32: 74 10 je 0x44
34: 31 c0 xor %eax,%eax
36: 85 d2 test %edx,%edx
38: 74 15 je 0x4f
3a: 8b .byte 0x8b
3b: 96 xchg %eax,%esi
3c: bc .byte 0xbc