INFO: task kworker/u4:2:148 blocked for more than 143 seconds.
Not tainted 5.14.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:2 state:D stack:21904 pid: 148 ppid: 2 flags:0x00004000
Workqueue: netns cleanup_net
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
tc_action_net_exit include/net/act_api.h:155 [inline]
gate_exit_net+0x2c/0x100 net/sched/act_gate.c:624
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
INFO: task kworker/1:7:25351 blocked for more than 143 seconds.
Not tainted 5.14.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:7 state:D stack:19952 pid:25351 ppid: 2 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_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
addrconf_dad_work+0xdb/0x1d10 net/ipv6/addrconf.c:4047
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/0:8:32577 blocked for more than 144 seconds.
Not tainted 5.14.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:8 state:D stack:25136 pid:32577 ppid: 2 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_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
addrconf_dad_work+0xdb/0x1d10 net/ipv6/addrconf.c:4047
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/27:
#0: ffffffff8c91c140 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
4 locks held by kworker/u4:2/148:
#0: ffff888140183138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc900016bfd20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272
#2: ffffffff8d94f770 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf0/0xc50 net/core/net_namespace.c:553
#3: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: tc_action_net_exit include/net/act_api.h:155 [inline]
#3: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: gate_exit_net+0x2c/0x100 net/sched/act_gate.c:624
2 locks held by kworker/u4:5/1212:
1 lock held by in:imklog/6233:
#0: ffff88801f9fc0f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990
2 locks held by agetty/6466:
#0: ffff888026226098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900012882e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2113
3 locks held by kworker/1:7/25351:
#0: ffff888026017938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc900052a7d20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272
#2: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xdb/0x1d10 net/ipv6/addrconf.c:4047
3 locks held by kworker/0:5/32567:
#0: ffff888011064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc90003f7fd20 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272
#2: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:74
3 locks held by kworker/0:7/32575:
#0: ffff888011064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc90004327d20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272
#2: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:251
3 locks held by kworker/0:8/32577:
#0: ffff888026017938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc9000436fd20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272
#2: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xdb/0x1d10 net/ipv6/addrconf.c:4047
3 locks held by kworker/0:12/32644:
#0: ffff888011065d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc9000494fd20 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272
#2: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x7a/0x800 net/wireless/reg.c:2423
1 lock held by syz-executor.4/1519:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.14.0-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: 1519 Comm: syz-executor.4 Not tainted 5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:mark_lock+0x29/0x1e00 kernel/locking/lockdep.c:4554
Code: 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec c0 01 00 00 65 48 8b 04 25 28 00 00 00 48 89 84 24 a0 01 00 00 <49> bf 00 00 00 00 00 fc ff df 48 c7 44 24 60 b3 8a b5 41 48 c7 44
RSP: 0018:ffffc90000007020 EFLAGS: 00000082
RAX: 16845dce49281500 RBX: ffff888024af8a90 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffff888024af8a70 RDI: ffff888024af8000
RBP: ffffc90000007210 R08: dffffc0000000000 R09: fffffbfff1fa2fc2
R10: fffffbfff1fa2fc2 R11: 0000000000000000 R12: 000000000000000f
R13: ffff888024af8a70 R14: 0000000000000003 R15: 0000000000000000
FS: 00007fe220fde700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3faa070000 CR3: 000000009f2af000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 000000000000d0eb
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
mark_usage kernel/locking/lockdep.c:4485 [inline]
__lock_acquire+0xbf5/0x2b00 kernel/locking/lockdep.c:4969
lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
debug_object_deactivate+0x61/0x400 lib/debugobjects.c:735
debug_hrtimer_deactivate kernel/time/hrtimer.c:425 [inline]
debug_deactivate kernel/time/hrtimer.c:481 [inline]
__run_hrtimer kernel/time/hrtimer.c:1653 [inline]
__hrtimer_run_queues+0x2f9/0xa60 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:193
Code: 84 00 00 00 00 00 0f 1f 40 00 be 0d 00 00 00 48 c7 c7 a0 8c 95 8c e8 6f 4e 4b 00 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc <48> 8b 04 24 65 48 8b 0c 25 c0 ef 01 00 65 8b 15 24 7a 7f 7e f7 c2
RSP: 0018:ffffc90000007990 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000016400000 RCX: dffffc0000000000
RDX: ffff888024af8000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007a80 R08: ffffffff8170c22d R09: fffffbfff1fa2fdd
R10: fffffbfff1fa2fdd R11: 0000000000000000 R12: ffff8880b9c200c0
R13: ffffffff8c3887d0 R14: ffffc90000007a80 R15: 1ffff11011ad15a6
get_timer_cpu_base kernel/time/timer.c:858 [inline]
get_timer_base kernel/time/timer.c:878 [inline]
lock_timer_base+0xee/0x270 kernel/time/timer.c:945
__mod_timer+0x202/0xd20 kernel/time/timer.c:1019
hsr_prune_nodes+0xac4/0xb10 net/hsr/hsr_framereg.c:513
call_timer_fn+0xf6/0x210 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1466 [inline]
__run_timers+0x71a/0x910 kernel/time/timer.c:1734
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1747
__do_softirq+0x392/0x7a3 kernel/softirq.c:558
do_softirq+0x161/0x240 kernel/softirq.c:459
</IRQ>
__local_bh_enable_ip+0x1b0/0x1f0 kernel/softirq.c:383
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
__dev_notify_flags+0x306/0x5e0
dev_change_flags+0xe3/0x190 net/core/dev.c:8833
do_setlink+0xe12/0x4300 net/core/rtnetlink.c:2719
rtnl_group_changelink net/core/rtnetlink.c:3242 [inline]
__rtnl_newlink net/core/rtnetlink.c:3396 [inline]
rtnl_newlink+0x1155/0x1d10 net/core/rtnetlink.c:3506
rtnetlink_rcv_msg+0x934/0xe60 net/core/rtnetlink.c:5572
netlink_rcv_skb+0x200/0x470 net/netlink/af_netlink.c:2504
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x814/0x9f0 net/netlink/af_netlink.c:1340
netlink_sendmsg+0xa29/0xe50 net/netlink/af_netlink.c:1929
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg net/socket.c:724 [inline]
____sys_sendmsg+0x5b9/0x910 net/socket.c:2409
___sys_sendmsg net/socket.c:2463 [inline]
__sys_sendmsg+0x37d/0x470 net/socket.c:2492
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
Code: Unable to access opcode bytes at RIP 0x4665cf.
RSP: 002b:00007fe220fde188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000009
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007fff6e65975f R14: 00007fe220fde300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 00 55 48 add %dl,0x48(%rbp)
3: 89 e5 mov %esp,%ebp
5: 41 57 push %r15
7: 41 56 push %r14
9: 41 55 push %r13
b: 41 54 push %r12
d: 53 push %rbx
e: 48 83 e4 e0 and $0xffffffffffffffe0,%rsp
12: 48 81 ec c0 01 00 00 sub $0x1c0,%rsp
19: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax
20: 00 00
22: 48 89 84 24 a0 01 00 mov %rax,0x1a0(%rsp)
29: 00
* 2a: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15 <-- trapping instruction
31: fc ff df
34: 48 c7 44 24 60 b3 8a movq $0x41b58ab3,0x60(%rsp)
3b: b5 41
3d: 48 rex.W
3e: c7 .byte 0xc7
3f: 44 rex.R