INFO: task syz-executor.1:27045 blocked for more than 143 seconds. Not tainted 5.3.0+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D13776 27045 26020 0x00000004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x2e5/0x5d0 kernel/sched/core.c:3880 schedule+0x47/0xd0 kernel/sched/core.c:3947 rwsem_down_write_slowpath+0x57a/0x920 kernel/locking/rwsem.c:1214 __down_write kernel/locking/rwsem.c:1365 [inline] down_write+0x88/0x90 kernel/locking/rwsem.c:1501 register_netdevice_notifier+0x3d/0x3e0 net/core/dev.c:1644 raw_init+0x148/0x170 net/can/raw.c:343 can_create+0x195/0x340 net/can/af_can.c:178 __sock_create+0x241/0x3a0 net/socket.c:1418 sock_create net/socket.c:1469 [inline] __sys_socket+0x96/0x170 net/socket.c:1511 __do_sys_socket net/socket.c:1520 [inline] __se_sys_socket net/socket.c:1518 [inline] __x64_sys_socket+0x4c/0x60 net/socket.c:1518 do_syscall_64+0xcf/0x2f0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x459a29 Code: Bad RIP value. RSP: 002b:00007f91f2d29c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459a29 RDX: 0000000000000001 RSI: 0000000000000003 RDI: 000000000000001d RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f91f2d2a6d4 R13: 00000000004c8891 R14: 00000000004df9a0 R15: 00000000ffffffff INFO: task syz-executor.1:27049 blocked for more than 143 seconds. Not tainted 5.3.0+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D13624 27049 26020 0x00000004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x2e5/0x5d0 kernel/sched/core.c:3880 schedule+0x47/0xd0 kernel/sched/core.c:3947 rwsem_down_write_slowpath+0x57a/0x920 kernel/locking/rwsem.c:1214 __down_write kernel/locking/rwsem.c:1365 [inline] down_write+0x88/0x90 kernel/locking/rwsem.c:1501 register_netdevice_notifier+0x3d/0x3e0 net/core/dev.c:1644 raw_init+0x148/0x170 net/can/raw.c:343 can_create+0x195/0x340 net/can/af_can.c:178 __sock_create+0x241/0x3a0 net/socket.c:1418 sock_create net/socket.c:1469 [inline] __sys_socket+0x96/0x170 net/socket.c:1511 __do_sys_socket net/socket.c:1520 [inline] __se_sys_socket net/socket.c:1518 [inline] __x64_sys_socket+0x4c/0x60 net/socket.c:1518 do_syscall_64+0xcf/0x2f0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x459a29 Code: Bad RIP value. RSP: 002b:00007f91f2d08c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459a29 RDX: 0000000000000001 RSI: 0000000000000003 RDI: 000000000000001d RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f91f2d096d4 R13: 00000000004c8891 R14: 00000000004df9a0 R15: 00000000ffffffff NMI backtrace for cpu 1 CPU: 1 PID: 1054 Comm: khungtaskd Not tainted 5.3.0+ #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+0xf5/0x159 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x18/0x75 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x197/0x1c2 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x27/0x40 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0x6d9/0x7c0 kernel/hung_task.c:289 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2572 Comm: kworker/u4:4 Not tainted 5.3.0+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:68 [inline] RIP: 0010:write_comp_data+0x9/0x70 kernel/kcov.c:123 Code: 0a 00 00 8b 80 04 0a 00 00 48 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 5d c3 0f 1f 00 65 4c 8b 04 25 40 6c 01 00 <65> 8b 05 88 75 bb 7e a9 00 01 1f 00 75 51 41 8b 80 00 0a 00 00 83 RSP: 0018:ffffc9000412bc40 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 000000000000e387 RCX: ffffffff83cf5c11 RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffffc9000412bc48 R08: ffff888129c4f080 R09: 0000000000000001 R10: 000000000000007c R11: ffffc9000412bc20 R12: 000000000001c70f R13: 0000000000000001 R14: ffffffff85a2179c R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88812be00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c42b228ae8 CR3: 000000012384b000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: get_next_corpse net/netfilter/nf_conntrack_core.c:2005 [inline] nf_ct_iterate_cleanup+0x201/0x2e0 net/netfilter/nf_conntrack_core.c:2037 nf_conntrack_cleanup_net_list+0x75/0x190 net/netfilter/nf_conntrack_core.c:2224 nf_conntrack_pernet_exit+0x115/0x130 net/netfilter/nf_conntrack_standalone.c:1156 ops_exit_list.isra.0+0xa2/0xc0 net/core/net_namespace.c:175 cleanup_net+0x3f6/0x6a0 net/core/net_namespace.c:594 process_one_work+0x3d4/0x890 kernel/workqueue.c:2269 worker_thread+0xa0/0x800 kernel/workqueue.c:2415 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352