INFO: task kworker/1:17:3051 blocked for more than 143 seconds.
Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:17 state:D stack:25040 pid: 3051 ppid: 2 flags:0x00004000
Workqueue: events_power_efficient reg_check_chans_work
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xc8d/0x1270 kernel/sched/core.c:6287
schedule+0x14b/0x210 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common+0xdff/0x2550 kernel/locking/mutex.c:669
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:743
reg_check_chans_work+0x7a/0x800 net/wireless/reg.c:2423
process_one_work+0x853/0x1140 kernel/workqueue.c:2297
worker_thread+0xac1/0x1320 kernel/workqueue.c:2444
kthread+0x453/0x480 kernel/kthread.c:319
ret_from_fork+0x1f/0x30
INFO: task kworker/1:19:3054 blocked for more than 143 seconds.
Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:19 state:D stack:24720 pid: 3054 ppid: 2 flags:0x00004000
Workqueue: events switchdev_deferred_process_work
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xc8d/0x1270 kernel/sched/core.c:6287
schedule+0x14b/0x210 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common+0xdff/0x2550 kernel/locking/mutex.c:669
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:743
switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:74
process_one_work+0x853/0x1140 kernel/workqueue.c:2297
worker_thread+0xac1/0x1320 kernel/workqueue.c:2444
kthread+0x453/0x480 kernel/kthread.c:319
ret_from_fork+0x1f/0x30
INFO: task kworker/1:20:3059 blocked for more than 143 seconds.
Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:20 state:D stack:24720 pid: 3059 ppid: 2 flags:0x00004000
Workqueue: events linkwatch_event
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xc8d/0x1270 kernel/sched/core.c:6287
schedule+0x14b/0x210 kernel/sched/core.c:6366
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
__mutex_lock_common+0xdff/0x2550 kernel/locking/mutex.c:669
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:743
linkwatch_event+0xa/0x50 net/core/link_watch.c:251
process_one_work+0x853/0x1140 kernel/workqueue.c:2297
worker_thread+0xac1/0x1320 kernel/workqueue.c:2444
kthread+0x453/0x480 kernel/kthread.c:319
ret_from_fork+0x1f/0x30
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8c91c200 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by in:imklog/6233:
#0: ffff88801dc32d70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990
3 locks held by kworker/0:6/8499:
#0: ffff888025b4e538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc900174c7d20 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272
#2: ffffffff8d95b4c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4590
4 locks held by kworker/u4:15/16966:
3 locks held by kworker/1:17/3051:
#0: ffff888011065d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc9000df5fd20 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272
#2: ffffffff8d95b4c8 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x7a/0x800 net/wireless/reg.c:2423
3 locks held by kworker/1:19/3054:
#0: ffff888011064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc9000df8fd20 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272
#2: ffffffff8d95b4c8 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:74
3 locks held by kworker/1:20/3059:
#0: ffff888011064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc9000df9fd20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272
#2: ffffffff8d95b4c8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:251
3 locks held by kworker/u4:9/3637:
2 locks held by syz-executor.1/3721:
#0: ffffffff8d9418c8 (vlan_ioctl_mutex){+.+.}-{3:3}, at: sock_ioctl+0x25c/0x990 net/socket.c:1197
#1: ffffffff8d95b4c8 (rtnl_mutex){+.+.}-{3:3}, at: vlan_ioctl_handler+0x11f/0xda0 net/8021q/vlan.c:560
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.15.0-rc1-syzkaller #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+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc54/0xca0 kernel/hung_task.c:295
kthread+0x453/0x480 kernel/kthread.c:319
ret_from_fork+0x1f/0x30
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 16966 Comm: kworker/u4:15 Not tainted 5.15.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:mark_lock+0x89/0x1e00 kernel/locking/lockdep.c:4554
Code: f2 f2 4b 89 04 3c 48 b8 f2 f2 f2 f2 f2 00 f2 f2 4b 89 44 3c 0f 43 c6 44 3c 17 f2 48 b8 f2 f2 f2 f2 f2 00 f3 f3 4b 89 44 3c 1f <43> c6 44 3c 27 f3 83 fa 0a 72 75 48 c7 c0 40 f8 92 90 48 c1 e8 03
RSP: 0018:ffffc9000d83f280 EFLAGS: 00000806
RAX: f3f300f2f2f2f2f2 RBX: ffff88801cce8a68 RCX: ffffffff81648381
RDX: 0000000000000007 RSI: ffff88801cce8a48 RDI: ffff88801cce8000
RBP: ffffc9000d83f470 R08: dffffc0000000000 R09: fffffbfff1fa2fe6
R10: fffffbfff1fa2fe6 R11: 0000000000000000 R12: 1ffff92001b07e5c
R13: ffff88801cce89f0 R14: ffff88801cce8000 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007feef11a9000 CR3: 000000000c68e000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_held_locks kernel/locking/lockdep.c:4194 [inline]
__trace_hardirqs_on_caller kernel/locking/lockdep.c:4220 [inline]
lockdep_hardirqs_on_prepare+0x37e/0x780 kernel/locking/lockdep.c:4280
trace_hardirqs_on+0x6f/0x80 kernel/trace/trace_preemptirq.c:49
__local_bh_enable_ip+0x163/0x1f0 kernel/softirq.c:388
get_next_corpse net/netfilter/nf_conntrack_core.c:2252 [inline]
nf_ct_iterate_cleanup+0x357/0x3f0 net/netfilter/nf_conntrack_core.c:2275
nf_ct_iterate_cleanup_net+0x172/0x1e0 net/netfilter/nf_conntrack_core.c:2363
masq_device_event+0x9b/0xd0 net/netfilter/nf_nat_masquerade.c:88
notifier_call_chain kernel/notifier.c:83 [inline]
raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:391
call_netdevice_notifiers_info net/core/dev.c:1996 [inline]
call_netdevice_notifiers_extack net/core/dev.c:2008 [inline]
call_netdevice_notifiers net/core/dev.c:2022 [inline]
dev_close_many+0x38b/0x540 net/core/dev.c:1597
unregister_netdevice_many+0x53a/0x19e0 net/core/dev.c:11016
default_device_exit_batch+0x44b/0x4b0 net/core/dev.c:11569
ops_exit_list net/core/net_namespace.c:171 [inline]
cleanup_net+0x7ec/0xc50 net/core/net_namespace.c:591
process_one_work+0x853/0x1140 kernel/workqueue.c:2297
worker_thread+0xac1/0x1320 kernel/workqueue.c:2444
kthread+0x453/0x480 kernel/kthread.c:319
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: f2 f2 4b 89 04 3c repnz repnz mov %rax,(%r12,%r15,1)
6: 48 b8 f2 f2 f2 f2 f2 movabs $0xf2f200f2f2f2f2f2,%rax
d: 00 f2 f2
10: 4b 89 44 3c 0f mov %rax,0xf(%r12,%r15,1)
15: 43 c6 44 3c 17 f2 movb $0xf2,0x17(%r12,%r15,1)
1b: 48 b8 f2 f2 f2 f2 f2 movabs $0xf3f300f2f2f2f2f2,%rax
22: 00 f3 f3
25: 4b 89 44 3c 1f mov %rax,0x1f(%r12,%r15,1)
* 2a: 43 c6 44 3c 27 f3 movb $0xf3,0x27(%r12,%r15,1) <-- trapping instruction
30: 83 fa 0a cmp $0xa,%edx
33: 72 75 jb 0xaa
35: 48 c7 c0 40 f8 92 90 mov $0xffffffff9092f840,%rax
3c: 48 c1 e8 03 shr $0x3,%rax