INFO: task kworker/u4:9:21541 blocked for more than 143 seconds. Not tainted 5.1.0-rc6+ #158 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:9 D25512 21541 2 0x80000000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x813/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 exp_funnel_lock kernel/rcu/tree_exp.h:308 [inline] synchronize_rcu_expedited+0x54e/0x5b0 kernel/rcu/tree_exp.h:758 synchronize_net+0x3b/0x60 net/core/dev.c:9277 rollback_registered_many+0x67b/0xfd0 net/core/dev.c:8201 unregister_netdevice_many.part.0+0x1b/0x1f0 net/core/dev.c:9322 unregister_netdevice_many+0x3b/0x50 net/core/dev.c:9321 vti6_exit_batch_net+0x467/0x690 net/ipv6/ip6_vti.c:1152 ops_exit_list.isra.0+0x105/0x160 net/core/net_namespace.c:156 cleanup_net+0x3fb/0x960 net/core/net_namespace.c:552 process_one_work+0x98e/0x1790 kernel/workqueue.c:2269 worker_thread+0x98/0xe40 kernel/workqueue.c:2415 kthread+0x357/0x430 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 INFO: task syz-executor.4:7051 blocked for more than 143 seconds. Not tainted 5.1.0-rc6+ #158 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D29960 7051 16901 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x813/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3620 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1310 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 sock_do_ioctl+0x254/0x300 net/socket.c:1050 sock_ioctl+0x3f3/0x790 net/socket.c:1188 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:696 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458da9 Code: 05 0c cc 45 00 48 89 04 24 48 c7 44 24 08 01 00 00 00 e8 6a 3e fd ff 48 8b 44 24 18 48 89 04 24 e8 0c 3d fd ff 48 8d 05 e5 cb <45> 00 48 89 04 24 48 c7 44 24 08 01 00 00 00 e8 43 3e fd ff 48 8b RSP: 002b:00007f4117ac9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458da9 RDX: 0000000020000000 RSI: 0000001000008912 RDI: 0000000000000003 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4117aca6d4 R13: 00000000004bffed R14: 00000000004d2330 R15: 00000000ffffffff INFO: task syz-executor.4:7062 blocked for more than 143 seconds. Not tainted 5.1.0-rc6+ #158 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D29720 7062 16901 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x813/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3620 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1310 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 do_ip_setsockopt.isra.0+0x292/0x3d00 net/ipv4/ip_sockglue.c:642 ip_setsockopt+0x49/0x100 net/ipv4/ip_sockglue.c:1246 tcp_setsockopt net/ipv4/tcp.c:3112 [inline] tcp_setsockopt+0x95/0xf0 net/ipv4/tcp.c:3106 sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:3125 __sys_setsockopt+0x180/0x280 net/socket.c:2066 __do_sys_setsockopt net/socket.c:2077 [inline] __se_sys_setsockopt net/socket.c:2074 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:2074 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458da9 Code: 05 0c cc 45 00 48 89 04 24 48 c7 44 24 08 01 00 00 00 e8 6a 3e fd ff 48 8b 44 24 18 48 89 04 24 e8 0c 3d fd ff 48 8d 05 e5 cb <45> 00 48 89 04 24 48 c7 44 24 08 01 00 00 00 e8 43 3e fd ff 48 8b RSP: 002b:00007f4117aa8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000458da9 RDX: 0000000000000027 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 000000000073bfa0 R08: 000000000000000c R09: 0000000000000000 R10: 0000000020683ff4 R11: 0000000000000246 R12: 00007f4117aa96d4 R13: 00000000004c6eda R14: 00000000004dbf30 R15: 00000000ffffffff INFO: task syz-executor.4:7068 blocked for more than 144 seconds. Not tainted 5.1.0-rc6+ #158 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D29720 7068 16901 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x813/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3620 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1310 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 do_ip_setsockopt.isra.0+0x292/0x3d00 net/ipv4/ip_sockglue.c:642 ip_setsockopt+0x49/0x100 net/ipv4/ip_sockglue.c:1246 tcp_setsockopt net/ipv4/tcp.c:3112 [inline] tcp_setsockopt+0x95/0xf0 net/ipv4/tcp.c:3106 sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:3125 __sys_setsockopt+0x180/0x280 net/socket.c:2066 __do_sys_setsockopt net/socket.c:2077 [inline] __se_sys_setsockopt net/socket.c:2074 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:2074 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458da9 Code: 05 0c cc 45 00 48 89 04 24 48 c7 44 24 08 01 00 00 00 e8 6a 3e fd ff 48 8b 44 24 18 48 89 04 24 e8 0c 3d fd ff 48 8d 05 e5 cb <45> 00 48 89 04 24 48 c7 44 24 08 01 00 00 00 e8 43 3e fd ff 48 8b RSP: 002b:00007f4117a87c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000458da9 RDX: 0000000000000029 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 000000000073c040 R08: 0000000000000018 R09: 0000000000000000 R10: 0000000020000040 R11: 0000000000000246 R12: 00007f4117a886d4 R13: 00000000004c6f08 R14: 00000000004dbf60 R15: 00000000ffffffff INFO: task syz-executor.4:7078 blocked for more than 144 seconds. Not tainted 5.1.0-rc6+ #158 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D29720 7078 16901 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x813/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3620 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1310 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 do_ip_setsockopt.isra.0+0x292/0x3d00 net/ipv4/ip_sockglue.c:642 ip_setsockopt+0x49/0x100 net/ipv4/ip_sockglue.c:1246 tcp_setsockopt net/ipv4/tcp.c:3112 [inline] tcp_setsockopt+0x95/0xf0 net/ipv4/tcp.c:3106 sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:3125 __sys_setsockopt+0x180/0x280 net/socket.c:2066 __do_sys_setsockopt net/socket.c:2077 [inline] __se_sys_setsockopt net/socket.c:2074 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:2074 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458da9 Code: 05 0c cc 45 00 48 89 04 24 48 c7 44 24 08 01 00 00 00 e8 6a 3e fd ff 48 8b 44 24 18 48 89 04 24 e8 0c 3d fd ff 48 8d 05 e5 cb <45> 00 48 89 04 24 48 c7 44 24 08 01 00 00 00 e8 43 3e fd ff 48 8b RSP: 002b:00007f4117a66c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000458da9 RDX: 0000000000000025 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 000000000073c0e0 R08: 000000000000000c R09: 0000000000000000 R10: 0000000020231000 R11: 0000000000000246 R12: 00007f4117a676d4 R13: 00000000004c6ef0 R14: 00000000004dbf48 R15: 00000000ffffffff INFO: task syz-executor.4:7094 blocked for more than 144 seconds. Not tainted 5.1.0-rc6+ #158 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D29960 7094 16901 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x813/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3620 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1310 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 sock_do_ioctl+0x254/0x300 net/socket.c:1050 sock_ioctl+0x3f3/0x790 net/socket.c:1188 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:696 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458da9 Code: 05 0c cc 45 00 48 89 04 24 48 c7 44 24 08 01 00 00 00 e8 6a 3e fd ff 48 8b 44 24 18 48 89 04 24 e8 0c 3d fd ff 48 8d 05 e5 cb <45> 00 48 89 04 24 48 c7 44 24 08 01 00 00 00 e8 43 3e fd ff 48 8b RSP: 002b:00007f4117a45c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458da9 RDX: 0000000020000000 RSI: 0000001000008912 RDI: 0000000000000003 RBP: 000000000073c180 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4117a466d4 R13: 00000000004bffed R14: 00000000004d2330 R15: 00000000ffffffff INFO: task syz-executor.4:7095 blocked for more than 145 seconds. Not tainted 5.1.0-rc6+ #158 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D29720 7095 16901 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x813/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3620 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1310 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 do_ip_setsockopt.isra.0+0x292/0x3d00 net/ipv4/ip_sockglue.c:642 ip_setsockopt+0x49/0x100 net/ipv4/ip_sockglue.c:1246 tcp_setsockopt net/ipv4/tcp.c:3112 [inline] tcp_setsockopt+0x95/0xf0 net/ipv4/tcp.c:3106 sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:3125 __sys_setsockopt+0x180/0x280 net/socket.c:2066 __do_sys_setsockopt net/socket.c:2077 [inline] __se_sys_setsockopt net/socket.c:2074 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:2074 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458da9 Code: 05 0c cc 45 00 48 89 04 24 48 c7 44 24 08 01 00 00 00 e8 6a 3e fd ff 48 8b 44 24 18 48 89 04 24 e8 0c 3d fd ff 48 8d 05 e5 cb <45> 00 48 89 04 24 48 c7 44 24 08 01 00 00 00 e8 43 3e fd ff 48 8b RSP: 002b:00007f4117a24c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000458da9 RDX: 0000000000000027 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 000000000073c220 R08: 000000000000000c R09: 0000000000000000 R10: 0000000020683ff4 R11: 0000000000000246 R12: 00007f4117a256d4 R13: 00000000004c6eda R14: 00000000004dbf30 R15: 00000000ffffffff INFO: task syz-executor.4:7096 blocked for more than 145 seconds. Not tainted 5.1.0-rc6+ #158 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D29720 7096 16901 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x813/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3620 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1310 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 do_ip_setsockopt.isra.0+0x292/0x3d00 net/ipv4/ip_sockglue.c:642 ip_setsockopt+0x49/0x100 net/ipv4/ip_sockglue.c:1246 tcp_setsockopt net/ipv4/tcp.c:3112 [inline] tcp_setsockopt+0x95/0xf0 net/ipv4/tcp.c:3106 sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:3125 __sys_setsockopt+0x180/0x280 net/socket.c:2066 __do_sys_setsockopt net/socket.c:2077 [inline] __se_sys_setsockopt net/socket.c:2074 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:2074 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458da9 Code: 05 0c cc 45 00 48 89 04 24 48 c7 44 24 08 01 00 00 00 e8 6a 3e fd ff 48 8b 44 24 18 48 89 04 24 e8 0c 3d fd ff 48 8d 05 e5 cb <45> 00 48 89 04 24 48 c7 44 24 08 01 00 00 00 e8 43 3e fd ff 48 8b RSP: 002b:00007f4117a03c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000458da9 RDX: 0000000000000029 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 000000000073c2c0 R08: 0000000000000018 R09: 0000000000000000 R10: 0000000020000040 R11: 0000000000000246 R12: 00007f4117a046d4 R13: 00000000004c6f08 R14: 00000000004dbf60 R15: 00000000ffffffff INFO: task syz-executor.2:7053 blocked for more than 145 seconds. Not tainted 5.1.0-rc6+ #158 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D29960 7053 29552 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x813/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3620 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1310 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 sock_do_ioctl+0x254/0x300 net/socket.c:1050 sock_ioctl+0x3f3/0x790 net/socket.c:1188 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:696 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458da9 Code: 05 0c cc 45 00 48 89 04 24 48 c7 44 24 08 01 00 00 00 e8 6a 3e fd ff 48 8b 44 24 18 48 89 04 24 e8 0c 3d fd ff 48 8d 05 e5 cb <45> 00 48 89 04 24 48 c7 44 24 08 01 00 00 00 e8 43 3e fd ff 48 8b RSP: 002b:00007f67d6988c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458da9 RDX: 0000000020000000 RSI: 0000001000008912 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f67d69896d4 R13: 00000000004bffed R14: 00000000004d2330 R15: 00000000ffffffff INFO: task syz-executor.2:7061 blocked for more than 146 seconds. Not tainted 5.1.0-rc6+ #158 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28352 7061 29552 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x813/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3620 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1310 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 sock_do_ioctl+0x254/0x300 net/socket.c:1050 sock_ioctl+0x3f3/0x790 net/socket.c:1188 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:696 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458da9 Code: Bad RIP value. RSP: 002b:00007f67d6967c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458da9 RDX: 0000000020000000 RSI: 0000001000008912 RDI: 0000000000000004 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f67d69686d4 R13: 00000000004bffed R14: 00000000004d2330 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1042: #0: 0000000066d437f6 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5057 2 locks held by rsyslogd/7797: #0: 000000000291ff10 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801 #1: 00000000fc29ce3d (logbuf_lock){-.-.}, at: is_bpf_text_address+0x0/0x170 kernel/bpf/core.c:699 2 locks held by getty/7910: #0: 0000000091fbbfc6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000091bb105c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7911: #0: 0000000032b288cd (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000003c754231 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7912: #0: 00000000f13bc17a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000099983244 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7913: #0: 00000000f7be29b1 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000ff754da7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7914: #0: 000000000ad56551 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000012a87492 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7915: #0: 00000000e21d7c89 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000004008ed6f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7916: #0: 00000000c1dd79d8 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000037addb3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 3 locks held by kworker/0:4/7960: #0: 000000003e26530a ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 000000003e26530a ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000003e26530a ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 000000003e26530a ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 000000003e26530a ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:619 [inline] #0: 000000003e26530a ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: 000000003e26530a ((wq_completion)events){+.+.}, at: process_one_work+0x87e/0x1790 kernel/workqueue.c:2240 #1: 00000000248fb3a1 (deferred_process_work){+.+.}, at: process_one_work+0x8b4/0x1790 kernel/workqueue.c:2244 #2: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 3 locks held by kworker/1:4/7997: #0: 0000000009dbf676 ((wq_completion)ipv6_addrconf){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 0000000009dbf676 ((wq_completion)ipv6_addrconf){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 0000000009dbf676 ((wq_completion)ipv6_addrconf){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 0000000009dbf676 ((wq_completion)ipv6_addrconf){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 0000000009dbf676 ((wq_completion)ipv6_addrconf){+.+.}, at: set_work_data kernel/workqueue.c:619 [inline] #0: 0000000009dbf676 ((wq_completion)ipv6_addrconf){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: 0000000009dbf676 ((wq_completion)ipv6_addrconf){+.+.}, at: process_one_work+0x87e/0x1790 kernel/workqueue.c:2240 #1: 00000000189d8c2c ((addr_chk_work).work){+.+.}, at: process_one_work+0x8b4/0x1790 kernel/workqueue.c:2244 #2: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 4 locks held by kworker/u4:9/21541: #0: 00000000225d2c96 ((wq_completion)netns){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000225d2c96 ((wq_completion)netns){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000225d2c96 ((wq_completion)netns){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 00000000225d2c96 ((wq_completion)netns){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 00000000225d2c96 ((wq_completion)netns){+.+.}, at: set_work_data kernel/workqueue.c:619 [inline] #0: 00000000225d2c96 ((wq_completion)netns){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: 00000000225d2c96 ((wq_completion)netns){+.+.}, at: process_one_work+0x87e/0x1790 kernel/workqueue.c:2240 #1: 0000000041a4326c (net_cleanup_work){+.+.}, at: process_one_work+0x8b4/0x1790 kernel/workqueue.c:2244 #2: 00000000c302927e (pernet_ops_rwsem){++++}, at: cleanup_net+0xae/0x960 net/core/net_namespace.c:519 #3: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 2 locks held by kworker/u4:11/29301: #0: 00000000b6051566 (&rq->lock){-.-.}, at: idle_balance kernel/sched/fair.c:10078 [inline] #0: 00000000b6051566 (&rq->lock){-.-.}, at: pick_next_task_fair+0x1214/0x19a0 kernel/sched/fair.c:7087 #1: 0000000066d437f6 (rcu_read_lock){....}, at: __update_idle_core+0x45/0x3f0 kernel/sched/fair.c:6084 1 lock held by syz-executor.4/7051: #0: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 1 lock held by syz-executor.4/7062: #0: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 1 lock held by syz-executor.4/7068: #0: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 1 lock held by syz-executor.4/7078: #0: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 1 lock held by syz-executor.4/7094: #0: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 1 lock held by syz-executor.4/7095: #0: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 1 lock held by syz-executor.4/7096: #0: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 1 lock held by syz-executor.2/7053: #0: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 1 lock held by syz-executor.2/7061: #0: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 1 lock held by syz-executor.1/7056: #0: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 1 lock held by syz-executor.1/7065: #0: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 1 lock held by syz-executor.1/7074: #0: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 1 lock held by syz-executor.1/7080: #0: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 1 lock held by syz-executor.1/7086: #0: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 1 lock held by syz-executor.1/7099: #0: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 2 locks held by syz-executor.5/7058: #0: 00000000c302927e (pernet_ops_rwsem){++++}, at: copy_net_ns+0x1c0/0x340 net/core/net_namespace.c:434 #1: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 1 lock held by syz-executor.5/7069: #0: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 2 locks held by syz-executor.5/7102: #0: 00000000c302927e (pernet_ops_rwsem){++++}, at: copy_net_ns+0x1c0/0x340 net/core/net_namespace.c:434 #1: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 1 lock held by syz-executor.3/7088: #0: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 1 lock held by syz-executor.3/7089: #0: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 1 lock held by syz-executor.0/7092: #0: 00000000a63fdbcf (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:76 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1042 Comm: khungtaskd Not tainted 5.1.0-rc6+ #158 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+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 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:204 [inline] watchdog+0x9b7/0xec0 kernel/hung_task.c:288 kthread+0x357/0x430 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: