INFO: task kworker/0:3:1264 blocked for more than 143 seconds. Not tainted 5.15.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:3 state:D stack:23672 pid: 1264 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 Showing all locks held in the system: 3 locks held by kworker/0:1/7: #0: ffff888026229938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140 #1: ffffc90000cc7d20 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272 #2: ffffffff8d95bc48 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4590 3 locks held by kworker/1:0/20: #0: ffff888011064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140 #1: ffffc90000da7d20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272 #2: ffffffff8d95bc48 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:251 1 lock held by khungtaskd/26: #0: ffffffff8c91c1c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 3 locks held by kworker/0:3/1264: #0: ffff888011065d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140 #1: ffffc90004d6fd20 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272 #2: ffffffff8d95bc48 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x7a/0x800 net/wireless/reg.c:2423 1 lock held by in:imklog/6209: #0: ffff88801b586af0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990 3 locks held by kworker/1:4/8338: #0: ffff888011064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140 #1: ffffc9001655fd20 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272 #2: ffffffff8d95bc48 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:74 2 locks held by kworker/u4:11/9260: 1 lock held by syz-executor.0/10142: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.15.0-rc3-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: 10142 Comm: syz-executor.0 Not tainted 5.15.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:hlock_class kernel/locking/lockdep.c:199 [inline] RIP: 0010:__lock_acquire+0x1300/0x2b00 kernel/locking/lockdep.c:5012 Code: 20 8b 18 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 00 8e d1 8f be 08 00 00 00 e8 a8 bd 69 00 48 0f a3 1d 40 78 6d 0e <72> 32 48 c7 c0 40 08 93 90 48 c1 e8 03 48 ba 00 00 00 00 00 fc ff RSP: 0018:ffffc90000dbfb60 EFLAGS: 00000057 RAX: 0000000000000001 RBX: 0000000000000042 RCX: ffffffff816415b8 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8fd18e08 RBP: ffffc90000dbfcb0 R08: dffffc0000000000 R09: fffffbfff1fa31c2 R10: fffffbfff1fa31c2 R11: 0000000000000000 R12: ffff88801fb20000 R13: ffff88801fb20a48 R14: ffffffff8f661860 R15: b20fbda6538c2b94 FS: 00007fd63ab3d700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcd02bcb008 CR3: 000000007ee3a000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625 seqcount_lockdep_reader_access+0xfe/0x230 include/linux/seqlock.h:103 ktime_get+0x35/0x2b0 kernel/time/timekeeping.c:827 hrtimer_forward_now include/linux/hrtimer.h:506 [inline] perf_swevent_hrtimer+0x485/0x530 kernel/events/core.c:10546 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x4cb/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:on_stack arch/x86/include/asm/stacktrace.h:48 [inline] RIP: 0010:stack_access_ok arch/x86/kernel/unwind_orc.c:342 [inline] RIP: 0010:deref_stack_reg arch/x86/kernel/unwind_orc.c:352 [inline] RIP: 0010:unwind_next_frame+0x9ae/0x1fa0 arch/x86/kernel/unwind_orc.c:534 Code: df 80 3c 08 00 74 05 e8 c0 d5 93 00 48 8b 04 24 48 8d 58 f8 49 8b 6d 10 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 18 8a 04 01 <84> c0 0f 85 49 11 00 00 48 39 dd 76 1a 49 39 de 77 15 41 83 7d 00 RSP: 0018:ffffc90000dc0540 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffffc90000dc0778 RCX: 1ffff920001b80c0 RDX: ffffc90000dc0780 RSI: 0000000000000000 RDI: ffffc90000dc0610 RBP: ffffc90000dc1000 R08: 0000000000000001 R09: ffffc90000dc06f0 R10: fffff520001b80cc R11: 0000000000000000 R12: 1ffffffff1caac2e R13: ffffc90000dc0600 R14: ffffc90000db9000 R15: ffffffff8e556176 arch_stack_walk+0x112/0x140 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x11b/0x1e0 kernel/stacktrace.c:121 kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:46 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360 ____kasan_slab_free+0x10d/0x150 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1700 [inline] slab_free_freelist_hook+0x129/0x1a0 mm/slub.c:1725 slab_free mm/slub.c:3483 [inline] kfree+0xcf/0x2f0 mm/slub.c:4543 skb_free_head net/core/skbuff.c:654 [inline] skb_release_data+0x3c3/0x4f0 net/core/skbuff.c:676 skb_release_all net/core/skbuff.c:741 [inline] __kfree_skb+0x56/0x1d0 net/core/skbuff.c:755 mac80211_hwsim_beacon_tx+0x46c/0x890 drivers/net/wireless/mac80211_hwsim.c:1838 __iterate_interfaces+0x23e/0x480 net/mac80211/util.c:793 ieee80211_iterate_active_interfaces_atomic+0x9b/0x120 net/mac80211/util.c:829 mac80211_hwsim_beacon+0xa5/0x160 drivers/net/wireless/mac80211_hwsim.c:1861 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x50b/0xa60 kernel/time/hrtimer.c:1749 hrtimer_run_softirq+0x1b7/0x5d0 kernel/time/hrtimer.c:1766 __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 39 ae a9 08 65 66 8b 05 91 ce b3 7e 66 85 c0 75 57 bf 01 00 00 00 e8 42 14 0a 00 e8 9d b5 39 00 fb 65 8b 05 fd b2 b2 7e <85> c0 75 05 e8 84 1a b1 ff 48 c7 44 24 20 0e 36 e0 45 49 c7 04 1c RSP: 0018:ffffc900047fe620 EFLAGS: 00000282 RAX: 0000000080000000 RBX: 1ffff920008ffcc8 RCX: ffffffff816483c1 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900047fe6d0 R08: dffffc0000000000 R09: fffffbfff1fa31c5 R10: fffffbfff1fa31c5 R11: 0000000000000000 R12: dffffc0000000000 R13: 1ffff920008ffccc R14: ffffc900047fe660 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:8837 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: 0033:0x7fd63d5c6709 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:00007fd63ab3d188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fd63d6caf60 RCX: 00007fd63d5c6709 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000006 RBP: 00007fd63d620cb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc3f48d67f R14: 00007fd63ab3d300 R15: 0000000000022000 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 8b 18 mov (%rax),%ebx 2: 81 e3 ff 1f 00 00 and $0x1fff,%ebx 8: 48 89 d8 mov %rbx,%rax b: 48 c1 e8 06 shr $0x6,%rax f: 48 8d 3c c5 00 8e d1 lea -0x702e7200(,%rax,8),%rdi 16: 8f 17: be 08 00 00 00 mov $0x8,%esi 1c: e8 a8 bd 69 00 callq 0x69bdc9 21: 48 0f a3 1d 40 78 6d bt %rbx,0xe6d7840(%rip) # 0xe6d7869 28: 0e * 29: 72 32 jb 0x5d <-- trapping instruction 2b: 48 c7 c0 40 08 93 90 mov $0xffffffff90930840,%rax 32: 48 c1 e8 03 shr $0x3,%rax 36: 48 rex.W 37: ba 00 00 00 00 mov $0x0,%edx 3c: 00 fc add %bh,%ah 3e: ff .byte 0xff