bridge0: port 1(bridge_slave_0) entered disabled state ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy1 wpan1: encryption failed: -22 ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy1 wpan1: encryption failed: -22 INFO: task kworker/u4:3:802 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:3 D25752 802 2 0x80000000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1016 [inline] __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078 cangw_pernet_exit+0xe/0x20 net/can/gw.c:1032 ops_exit_list+0xa5/0x150 net/core/net_namespace.c:153 cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:554 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Showing all locks held in the system: 4 locks held by kworker/u4:3/802: #0: 0000000061fed42d ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 00000000577a2303 (net_cleanup_work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 000000004685b4e9 (pernet_ops_rwsem){++++}, at: cleanup_net+0xa8/0x8b0 net/core/net_namespace.c:521 #3: 00000000bec18d01 (rtnl_mutex){+.+.}, at: cangw_pernet_exit+0xe/0x20 net/can/gw.c:1032 3 locks held by kworker/u4:4/889: #0: 00000000d471d605 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #0: 00000000d471d605 (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 #1: 000000002e18a018 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 0000000034742533 (&base->lock){-.-.}, at: lock_timer_base+0x55/0x1b0 kernel/time/timer.c:950 1 lock held by khungtaskd/1571: #0: 00000000075f8492 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7806: #0: 00000000d60f0cca (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 2 locks held by agetty/8029: #0: 00000000e59c86ca (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000d009b9ee (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1950 drivers/tty/n_tty.c:2154 3 locks held by kworker/1:1/10684: #0: 000000000fc7388a ((wq_completion)"events"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 000000009783467b ((linkwatch_work).work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 00000000bec18d01 (rtnl_mutex){+.+.}, at: linkwatch_event+0xb/0x60 net/core/link_watch.c:236 3 locks held by kworker/1:3/16532: #0: 000000000fc7388a ((wq_completion)"events"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 000000006123c18a (deferred_process_work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 00000000bec18d01 (rtnl_mutex){+.+.}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:150 1 lock held by syz-executor.1/23600: 3 locks held by kworker/1:0/23610: #0: 000000000401bcae ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 00000000b1c977a6 ((addr_chk_work).work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 00000000bec18d01 (rtnl_mutex){+.+.}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4476 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1571 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 10060 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lockdep_hardirqs_off+0xae/0x2c0 kernel/locking/lockdep.c:2902 Code: 01 00 00 41 8b b4 24 84 08 00 00 85 f6 0f 85 4c 01 00 00 48 c7 c0 60 37 24 8d 48 ba 00 00 00 00 00 fc ff df 48 89 c1 83 e0 07 <48> c1 e9 03 83 c0 03 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 96 01 00 RSP: 0018:ffff888049247f08 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffff88809b49e180 RCX: ffffffff8d243760 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff88809b49ea04 RBP: ffffffff81007827 R08: ffff888049247ab8 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff88809b49e180 R13: ffffffff89f18298 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000020000880(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000b88 CR3: 0000000091194000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x207/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7faff15aa5af Code: 89 d8 83 e0 0c 83 f8 04 74 01 c3 64 48 8b 3c 25 00 00 00 00 b8 ca 00 00 00 4d 31 d2 48 81 c7 08 03 00 00 be 80 00 00 00 0f 05 <64> 8b 04 25 08 03 00 00 eb ce 0f 1f 80 00 00 00 00 4c 8b 0f 48 89 RSP: 002b:00007fafefefc0a8 EFLAGS: 00000292 ORIG_RAX: 00000000000000ca RAX: fffffffffffffff2 RBX: 00007faff1699f60 RCX: 00007faff15aa5af RDX: 00007fafefefc0f0 RSI: 0000000000000080 RDI: efe0a65dfb0b28b0 RBP: 00007faff15e108d R08: 0000000075a19c14 R09: 0000000020000880 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 00007fff680060ff R14: 00007fafefefc300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 01 00 add %eax,(%rax) 2: 00 41 8b add %al,-0x75(%rcx) 5: b4 24 mov $0x24,%ah 7: 84 08 test %cl,(%rax) 9: 00 00 add %al,(%rax) b: 85 f6 test %esi,%esi d: 0f 85 4c 01 00 00 jne 0x15f 13: 48 c7 c0 60 37 24 8d mov $0xffffffff8d243760,%rax 1a: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 21: fc ff df 24: 48 89 c1 mov %rax,%rcx 27: 83 e0 07 and $0x7,%eax * 2a: 48 c1 e9 03 shr $0x3,%rcx <-- trapping instruction 2e: 83 c0 03 add $0x3,%eax 31: 0f b6 14 11 movzbl (%rcx,%rdx,1),%edx 35: 38 d0 cmp %dl,%al 37: 7c 08 jl 0x41 39: 84 d2 test %dl,%dl 3b: 0f .byte 0xf 3c: 85 .byte 0x85 3d: 96 xchg %eax,%esi 3e: 01 00 add %eax,(%rax)