INFO: task kworker/0:4:8309 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/0:4 state:D stack:24240 pid: 8309 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/u4:7:9356 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/u4:7 state:D stack:22264 pid: 9356 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 Showing all locks held in the system: 1 lock held by khungtaskd/26: #0: ffffffff8c91c180 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 1 lock held by khugepaged/32: 3 locks held by kworker/0:2/1262: #0: ffff888025ca2d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140 #1: ffffc90004c17d20 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272 #2: ffffffff8d95b408 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4590 1 lock held by in:imklog/6220: #0: ffff88807d8945f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990 2 locks held by agetty/6240: #0: ffff88801666c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc9000120c2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2113 3 locks held by kworker/0:4/8309: #0: ffff888011065d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140 #1: ffffc90016e3fd20 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272 #2: ffffffff8d95b408 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x7a/0x800 net/wireless/reg.c:2423 4 locks held by kworker/u4:7/9356: #0: ffff8881443a3138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140 #1: ffffc90004967d20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272 #2: ffffffff8d94f7b0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf0/0xc50 net/core/net_namespace.c:553 #3: ffffffff8d95b408 (rtnl_mutex){+.+.}-{3:3}, at: tc_action_net_exit include/net/act_api.h:155 [inline] #3: ffffffff8d95b408 (rtnl_mutex){+.+.}-{3:3}, at: gate_exit_net+0x2c/0x100 net/sched/act_gate.c:624 1 lock held by syz-executor.3/15139: #0: ffff8881484c6460 (sb_writers#5){.+.+}-{0:0}, at: __do_splice fs/splice.c:1144 [inline] #0: ffff8881484c6460 (sb_writers#5){.+.+}-{0:0}, at: __do_sys_splice fs/splice.c:1350 [inline] #0: ffff8881484c6460 (sb_writers#5){.+.+}-{0:0}, at: __se_sys_splice+0x2a8/0x410 fs/splice.c:1332 1 lock held by syz-executor.3/15160: #0: ffff8881484c6460 (sb_writers#5){.+.+}-{0:0}, at: __do_splice fs/splice.c:1144 [inline] #0: ffff8881484c6460 (sb_writers#5){.+.+}-{0:0}, at: __do_sys_splice fs/splice.c:1350 [inline] #0: ffff8881484c6460 (sb_writers#5){.+.+}-{0:0}, at: __se_sys_splice+0x2a8/0x410 fs/splice.c:1332 1 lock held by syz-executor.3/15180: #0: ffff8881484c6460 (sb_writers#5){.+.+}-{0:0}, at: __do_splice fs/splice.c:1144 [inline] #0: ffff8881484c6460 (sb_writers#5){.+.+}-{0:0}, at: __do_sys_splice fs/splice.c:1350 [inline] #0: ffff8881484c6460 (sb_writers#5){.+.+}-{0:0}, at: __se_sys_splice+0x2a8/0x410 fs/splice.c:1332 1 lock held by syz-executor.3/15208: #0: ffff8881484c6460 (sb_writers#5){.+.+}-{0:0}, at: __do_splice fs/splice.c:1144 [inline] #0: ffff8881484c6460 (sb_writers#5){.+.+}-{0:0}, at: __do_sys_splice fs/splice.c:1350 [inline] #0: ffff8881484c6460 (sb_writers#5){.+.+}-{0:0}, at: __se_sys_splice+0x2a8/0x410 fs/splice.c:1332 4 locks held by syz-executor.2/21894: ============================================= NMI backtrace for cpu 0 CPU: 0 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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 21894 Comm: syz-executor.2 Not tainted 5.15.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kasan_check_range+0x4/0x2f0 mm/kasan/generic.c:188 Code: c7 e8 e0 2d 2b 08 31 c0 c3 0f 0b b8 ea ff ff ff c3 0f 0b b8 ea ff ff ff c3 cc cc cc cc cc cc cc cc cc cc cc cc cc 41 57 41 56 <41> 55 41 54 53 b0 01 48 85 f6 0f 84 0d 02 00 00 48 89 fb 48 01 f3 RSP: 0018:ffffc90000dc01a8 EFLAGS: 00000046 RAX: 1ffffffff18710fb RBX: ffff8880b9d32508 RCX: ffffffff816cf448 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880b9d32508 RBP: ffffc90000dc0268 R08: dffffc0000000000 R09: fffffbfff1bb7d4e R10: fffffbfff1bb7d4e R11: 0000000000000000 R12: 0000000000000000 R13: 1ffff920001b8060 R14: ffffffff8c3887d8 R15: dffffc0000000000 FS: 00007f6d738b9700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2c37a63000 CR3: 000000007347d000 CR4: 00000000001526e0 Call Trace: instrument_atomic_read include/linux/instrumented.h:71 [inline] atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline] rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:330 [inline] rcu_is_watching+0x58/0xb0 kernel/rcu/tree.c:1121 rcu_read_lock_held_common kernel/rcu/update.c:108 [inline] rcu_read_lock_sched_held+0x6b/0x130 kernel/rcu/update.c:123 trace_lock_acquire+0x59/0x190 include/trace/events/lock.h:13 lock_acquire+0xa5/0x4d0 kernel/locking/lockdep.c:5596 __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:lock_acquire+0x21f/0x4d0 kernel/locking/lockdep.c:5629 Code: 08 4c 89 f7 e8 c2 d1 69 00 f6 84 24 81 00 00 00 02 0f 85 13 02 00 00 41 f7 c4 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 04 2f 00 00 00 00 43 c7 44 2f 09 00 00 00 00 43 c7 44 2f 11 RSP: 0018:ffffc90000dc08c0 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 1ffff920001b8128 RCX: ffff888083372670 RDX: 0000000000000000 RSI: 0000000000000300 RDI: 0000000000000000 RBP: ffffc90000dc0a20 R08: dffffc0000000000 R09: fffffbfff1fa2fcd R10: fffffbfff1fa2fcd R11: 0000000000000000 R12: 0000000000000246 R13: 1ffff920001b8120 R14: ffffc90000dc0940 R15: dffffc0000000000 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:267 rcu_read_lock_bh include/linux/rcupdate.h:741 [inline] wg_packet_create_data drivers/net/wireguard/send.c:316 [inline] wg_packet_send_staged_packets+0x8e8/0x1350 drivers/net/wireguard/send.c:387 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 __irq_exit_rcu+0xec/0x170 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 RIP: 0010:should_resched arch/x86/include/asm/preempt.h:103 [inline] RIP: 0010:__local_bh_enable_ip+0x16b/0x1f0 kernel/softirq.c:390 Code: 8a e8 89 3e a9 08 65 66 8b 05 f1 ce b3 7e 66 85 c0 75 57 bf 01 00 00 00 e8 42 14 0a 00 e8 7d b5 39 00 fb 65 8b 05 5d b3 b2 7e <85> c0 75 05 e8 94 1c b1 ff 48 c7 44 24 20 0e 36 e0 45 49 c7 04 1c RSP: 0018:ffffc9000343e620 EFLAGS: 00000282 RAX: 0000000000000000 RBX: 1ffff92000687cc8 RCX: ffffffff81648361 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000343e6d0 R08: dffffc0000000000 R09: fffffbfff1fa2fc5 R10: fffffbfff1fa2fc5 R11: 0000000000000000 R12: dffffc0000000000 R13: 1ffff92000687ccc R14: ffffc9000343e660 R15: 0000000000000200 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+0x36f/0x450 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: 0033:0x7f6d76342739 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6d738b9188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f6d76446f80 RCX: 00007f6d76342739 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000007 RBP: 00007f6d7639ccc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6d76446f80 R13: 00007ffd5ef56b8f R14: 00007f6d738b9300 R15: 0000000000022000 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: e8 e0 2d 2b 08 callq 0x82b2de5 5: 31 c0 xor %eax,%eax 7: c3 retq 8: 0f 0b ud2 a: b8 ea ff ff ff mov $0xffffffea,%eax f: c3 retq 10: 0f 0b ud2 12: b8 ea ff ff ff mov $0xffffffea,%eax 17: c3 retq 18: cc int3 19: cc int3 1a: cc int3 1b: cc int3 1c: cc int3 1d: cc int3 1e: cc int3 1f: cc int3 20: cc int3 21: cc int3 22: cc int3 23: cc int3 24: cc int3 25: 41 57 push %r15 27: 41 56 push %r14 * 29: 41 55 push %r13 <-- trapping instruction 2b: 41 54 push %r12 2d: 53 push %rbx 2e: b0 01 mov $0x1,%al 30: 48 85 f6 test %rsi,%rsi 33: 0f 84 0d 02 00 00 je 0x246 39: 48 89 fb mov %rdi,%rbx 3c: 48 01 f3 add %rsi,%rbx