TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. INFO: task syz-executor2:8877 blocked for more than 143 seconds. Not tainted 5.3.0-rc4 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor2 D28168 8877 7309 0x00000004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x719/0x1530 kernel/sched/core.c:3880 schedule+0x8f/0x260 kernel/sched/core.c:3944 schedule_timeout+0x5c4/0xad0 kernel/time/timer.c:1783 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x28b/0x460 kernel/sched/completion.c:136 __flush_work+0x415/0x910 kernel/workqueue.c:3040 __cancel_work_timer+0x308/0x440 kernel/workqueue.c:3127 cancel_delayed_work_sync+0xe/0x10 kernel/workqueue.c:3259 tls_sw_cancel_work_tx+0x63/0x70 net/tls/tls_sw.c:2063 tls_sk_proto_close+0x330/0x760 net/tls/tls_main.c:299 inet_release+0xc6/0x1c0 net/ipv4/af_inet.c:427 inet6_release+0x46/0x60 net/ipv6/af_inet6.c:470 __sock_release+0xc7/0x280 net/socket.c:590 sock_close+0x13/0x20 net/socket.c:1268 __fput+0x25d/0x780 fs/file_table.c:280 ____fput+0x9/0x10 fs/file_table.c:313 task_work_run+0x10e/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x1be/0x210 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x468/0x550 arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411211 Code: 24 28 48 8d 6c 24 28 48 8b 44 24 38 0f b6 48 17 f6 c1 80 74 6a 48 8b 08 48 89 4c 24 10 48 8b 4c 24 40 48 89 0c 24 48 8b 54 24 <48> 48 89 54 24 08 e8 b4 71 04 00 0f b6 05 92 a5 e4 00 84 c0 75 0a RSP: 002b:00007ffff2cecf20 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411211 RDX: 0000000000000000 RSI: 0000000000740b80 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffff2cece50 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000002 INFO: task syz-executor5:8960 blocked for more than 143 seconds. Not tainted 5.3.0-rc4 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D28168 8960 7317 0x00000004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x719/0x1530 kernel/sched/core.c:3880 schedule+0x8f/0x260 kernel/sched/core.c:3944 schedule_timeout+0x5c4/0xad0 kernel/time/timer.c:1783 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x28b/0x460 kernel/sched/completion.c:136 __flush_work+0x415/0x910 kernel/workqueue.c:3040 __cancel_work_timer+0x308/0x440 kernel/workqueue.c:3127 cancel_delayed_work_sync+0xe/0x10 kernel/workqueue.c:3259 tls_sw_cancel_work_tx+0x63/0x70 net/tls/tls_sw.c:2063 tls_sk_proto_close+0x330/0x760 net/tls/tls_main.c:299 inet_release+0xc6/0x1c0 net/ipv4/af_inet.c:427 inet6_release+0x46/0x60 net/ipv6/af_inet6.c:470 __sock_release+0xc7/0x280 net/socket.c:590 sock_close+0x13/0x20 net/socket.c:1268 __fput+0x25d/0x780 fs/file_table.c:280 ____fput+0x9/0x10 fs/file_table.c:313 task_work_run+0x10e/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x1be/0x210 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x468/0x550 arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411211 Code: 24 28 48 8d 6c 24 28 48 8b 44 24 38 0f b6 48 17 f6 c1 80 74 6a 48 8b 08 48 89 4c 24 10 48 8b 4c 24 40 48 89 0c 24 48 8b 54 24 <48> 48 89 54 24 08 e8 b4 71 04 00 0f b6 05 92 a5 e4 00 84 c0 75 0a RSP: 002b:00007ffdf36f1830 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411211 RDX: 0000000000000000 RSI: 0000000000740b80 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffdf36f1760 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000005 INFO: task syz-executor3:8964 blocked for more than 143 seconds. Not tainted 5.3.0-rc4 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D28168 8964 7299 0x00000004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x719/0x1530 kernel/sched/core.c:3880 schedule+0x8f/0x260 kernel/sched/core.c:3944 schedule_timeout+0x5c4/0xad0 kernel/time/timer.c:1783 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x28b/0x460 kernel/sched/completion.c:136 __flush_work+0x415/0x910 kernel/workqueue.c:3040 __cancel_work_timer+0x308/0x440 kernel/workqueue.c:3127 cancel_delayed_work_sync+0xe/0x10 kernel/workqueue.c:3259 tls_sw_cancel_work_tx+0x63/0x70 net/tls/tls_sw.c:2063 tls_sk_proto_close+0x330/0x760 net/tls/tls_main.c:299 inet_release+0xc6/0x1c0 net/ipv4/af_inet.c:427 inet6_release+0x46/0x60 net/ipv6/af_inet6.c:470 __sock_release+0xc7/0x280 net/socket.c:590 sock_close+0x13/0x20 net/socket.c:1268 __fput+0x25d/0x780 fs/file_table.c:280 ____fput+0x9/0x10 fs/file_table.c:313 task_work_run+0x10e/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x1be/0x210 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x468/0x550 arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411211 Code: 24 28 48 8d 6c 24 28 48 8b 44 24 38 0f b6 48 17 f6 c1 80 74 6a 48 8b 08 48 89 4c 24 10 48 8b 4c 24 40 48 89 0c 24 48 8b 54 24 <48> 48 89 54 24 08 e8 b4 71 04 00 0f b6 05 92 a5 e4 00 84 c0 75 0a RSP: 002b:00007ffe92d647b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411211 RDX: 0000000000000000 RSI: 0000000000740b80 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffe92d646e0 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000003 INFO: task syz-executor1:8968 blocked for more than 144 seconds. Not tainted 5.3.0-rc4 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D26928 8968 7306 0x00000004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x719/0x1530 kernel/sched/core.c:3880 schedule+0x8f/0x260 kernel/sched/core.c:3944 schedule_timeout+0x5c4/0xad0 kernel/time/timer.c:1783 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x28b/0x460 kernel/sched/completion.c:136 __flush_work+0x415/0x910 kernel/workqueue.c:3040 __cancel_work_timer+0x308/0x440 kernel/workqueue.c:3127 cancel_delayed_work_sync+0xe/0x10 kernel/workqueue.c:3259 tls_sw_cancel_work_tx+0x63/0x70 net/tls/tls_sw.c:2063 tls_sk_proto_close+0x330/0x760 net/tls/tls_main.c:299 inet_release+0xc6/0x1c0 net/ipv4/af_inet.c:427 inet6_release+0x46/0x60 net/ipv6/af_inet6.c:470 __sock_release+0xc7/0x280 net/socket.c:590 sock_close+0x13/0x20 net/socket.c:1268 __fput+0x25d/0x780 fs/file_table.c:280 ____fput+0x9/0x10 fs/file_table.c:313 task_work_run+0x10e/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x1be/0x210 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x468/0x550 arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411211 Code: 24 28 48 8d 6c 24 28 48 8b 44 24 38 0f b6 48 17 f6 c1 80 74 6a 48 8b 08 48 89 4c 24 10 48 8b 4c 24 40 48 89 0c 24 48 8b 54 24 <48> 48 89 54 24 08 e8 b4 71 04 00 0f b6 05 92 a5 e4 00 84 c0 75 0a RSP: 002b:00007ffd04922de0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411211 RDX: 0000000000000000 RSI: 0000000000740b80 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffd04922d10 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000001 INFO: task syz-executor0:8972 blocked for more than 144 seconds. Not tainted 5.3.0-rc4 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D28168 8972 7312 0x00000004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x719/0x1530 kernel/sched/core.c:3880 schedule+0x8f/0x260 kernel/sched/core.c:3944 schedule_timeout+0x5c4/0xad0 kernel/time/timer.c:1783 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x28b/0x460 kernel/sched/completion.c:136 __flush_work+0x415/0x910 kernel/workqueue.c:3040 __cancel_work_timer+0x308/0x440 kernel/workqueue.c:3127 cancel_delayed_work_sync+0xe/0x10 kernel/workqueue.c:3259 tls_sw_cancel_work_tx+0x63/0x70 net/tls/tls_sw.c:2063 tls_sk_proto_close+0x330/0x760 net/tls/tls_main.c:299 inet_release+0xc6/0x1c0 net/ipv4/af_inet.c:427 inet6_release+0x46/0x60 net/ipv6/af_inet6.c:470 __sock_release+0xc7/0x280 net/socket.c:590 sock_close+0x13/0x20 net/socket.c:1268 __fput+0x25d/0x780 fs/file_table.c:280 ____fput+0x9/0x10 fs/file_table.c:313 task_work_run+0x10e/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x1be/0x210 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x468/0x550 arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411211 Code: 24 28 48 8d 6c 24 28 48 8b 44 24 38 0f b6 48 17 f6 c1 80 74 6a 48 8b 08 48 89 4c 24 10 48 8b 4c 24 40 48 89 0c 24 48 8b 54 24 <48> 48 89 54 24 08 e8 b4 71 04 00 0f b6 05 92 a5 e4 00 84 c0 75 0a RSP: 002b:00007ffe3a2da850 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411211 RDX: 0000000000000000 RSI: 0000000000740b80 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffe3a2da780 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000000 INFO: task syz-executor4:8977 blocked for more than 144 seconds. Not tainted 5.3.0-rc4 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D28168 8977 7302 0x00004004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x719/0x1530 kernel/sched/core.c:3880 schedule+0x8f/0x260 kernel/sched/core.c:3944 schedule_timeout+0x5c4/0xad0 kernel/time/timer.c:1783 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x28b/0x460 kernel/sched/completion.c:136 __flush_work+0x415/0x910 kernel/workqueue.c:3040 __cancel_work_timer+0x308/0x440 kernel/workqueue.c:3127 cancel_delayed_work_sync+0xe/0x10 kernel/workqueue.c:3259 tls_sw_cancel_work_tx+0x63/0x70 net/tls/tls_sw.c:2063 tls_sk_proto_close+0x330/0x760 net/tls/tls_main.c:299 inet_release+0xc6/0x1c0 net/ipv4/af_inet.c:427 inet6_release+0x46/0x60 net/ipv6/af_inet6.c:470 __sock_release+0xc7/0x280 net/socket.c:590 sock_close+0x13/0x20 net/socket.c:1268 __fput+0x25d/0x780 fs/file_table.c:280 ____fput+0x9/0x10 fs/file_table.c:313 task_work_run+0x10e/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x1be/0x210 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x468/0x550 arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411211 Code: 24 28 48 8d 6c 24 28 48 8b 44 24 38 0f b6 48 17 f6 c1 80 74 6a 48 8b 08 48 89 4c 24 10 48 8b 4c 24 40 48 89 0c 24 48 8b 54 24 <48> 48 89 54 24 08 e8 b4 71 04 00 0f b6 05 92 a5 e4 00 84 c0 75 0a RSP: 002b:00007ffc1d3fec60 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411211 RDX: 0000000000000000 RSI: 0000000000740b80 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffc1d3feb90 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000004 Showing all locks held in the system: 2 locks held by kworker/0:0/5: #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: process_one_work+0x76f/0x1640 kernel/workqueue.c:2240 #1: 000000002b51efcb ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}, at: process_one_work+0x79f/0x1640 kernel/workqueue.c:2244 2 locks held by kworker/1:1/22: #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: process_one_work+0x76f/0x1640 kernel/workqueue.c:2240 #1: 00000000852ecd56 ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}, at: process_one_work+0x79f/0x1640 kernel/workqueue.c:2244 1 lock held by khungtaskd/1042: #0: 0000000095fbcc64 (rcu_read_lock){....}, at: debug_show_all_locks+0x5b/0x27a kernel/locking/lockdep.c:5256 2 locks held by kworker/1:2/3465: #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: process_one_work+0x76f/0x1640 kernel/workqueue.c:2240 #1: 0000000094e63202 ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}, at: process_one_work+0x79f/0x1640 kernel/workqueue.c:2244 1 lock held by rsyslogd/7098: 2 locks held by getty/7188: #0: 00000000372b99d6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: 000000001d416b00 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1930 drivers/tty/n_tty.c:2156 2 locks held by getty/7189: #0: 0000000047b89584 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: 000000001282879a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1930 drivers/tty/n_tty.c:2156 2 locks held by getty/7190: #0: 00000000f4fb3be6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: 00000000b05820b1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1930 drivers/tty/n_tty.c:2156 2 locks held by getty/7191: #0: 00000000640f30d0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: 0000000037532e93 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1930 drivers/tty/n_tty.c:2156 2 locks held by getty/7192: #0: 000000008944cd9f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: 00000000b2f45483 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1930 drivers/tty/n_tty.c:2156 2 locks held by getty/7193: #0: 000000008a9f588c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: 0000000053104324 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1930 drivers/tty/n_tty.c:2156 2 locks held by getty/7194: #0: 000000006b43d532 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: 000000005516bde1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1930 drivers/tty/n_tty.c:2156 2 locks held by kworker/1:3/7756: #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: process_one_work+0x76f/0x1640 kernel/workqueue.c:2240 #1: 00000000dbaf5863 ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}, at: process_one_work+0x79f/0x1640 kernel/workqueue.c:2244 1 lock held by syz-executor2/8877: #0: 000000002d06d13c (&sb->s_type->i_mutex_key#12){+.+.}, at: inode_lock include/linux/fs.h:778 [inline] #0: 000000002d06d13c (&sb->s_type->i_mutex_key#12){+.+.}, at: __sock_release+0x7d/0x280 net/socket.c:589 2 locks held by kworker/1:4/8940: #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: process_one_work+0x76f/0x1640 kernel/workqueue.c:2240 #1: 00000000833c14f5 ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}, at: process_one_work+0x79f/0x1640 kernel/workqueue.c:2244 2 locks held by kworker/0:4/8947: #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline] #0: 000000005f0175d2 ((wq_completion)events){+.+.}, at: process_one_work+0x76f/0x1640 kernel/workqueue.c:2240 #1: 00000000c375c721 ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}, at: process_one_work+0x79f/0x1640 kernel/workqueue.c:2244 1 lock held by syz-executor5/8960: #0: 00000000a4785c7e (&sb->s_type->i_mutex_key#12){+.+.}, at: inode_lock include/linux/fs.h:778 [inline] #0: 00000000a4785c7e (&sb->s_type->i_mutex_key#12){+.+.}, at: __sock_release+0x7d/0x280 net/socket.c:589 1 lock held by syz-executor3/8964: #0: 00000000c3a454a1 (&sb->s_type->i_mutex_key#12){+.+.}, at: inode_lock include/linux/fs.h:778 [inline] #0: 00000000c3a454a1 (&sb->s_type->i_mutex_key#12){+.+.}, at: __sock_release+0x7d/0x280 net/socket.c:589 1 lock held by syz-executor1/8968: #0: 0000000066d528b8 (&sb->s_type->i_mutex_key#12){+.+.}, at: inode_lock include/linux/fs.h:778 [inline] #0: 0000000066d528b8 (&sb->s_type->i_mutex_key#12){+.+.}, at: __sock_release+0x7d/0x280 net/socket.c:589 1 lock held by syz-executor0/8972: #0: 00000000a653982c (&sb->s_type->i_mutex_key#12){+.+.}, at: inode_lock include/linux/fs.h:778 [inline] #0: 00000000a653982c (&sb->s_type->i_mutex_key#12){+.+.}, at: __sock_release+0x7d/0x280 net/socket.c:589 1 lock held by syz-executor4/8977: #0: 00000000a4afb36c (&sb->s_type->i_mutex_key#12){+.+.}, at: inode_lock include/linux/fs.h:778 [inline] #0: 00000000a4afb36c (&sb->s_type->i_mutex_key#12){+.+.}, at: __sock_release+0x7d/0x280 net/socket.c:589 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1042 Comm: khungtaskd Not tainted 5.3.0-rc4 #1 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+0x113/0x167 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.7+0x4b/0x84 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x18b/0x1b7 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:205 [inline] watchdog+0x592/0xb70 kernel/hung_task.c:289 kthread+0x334/0x3f0 kernel/kthread.c:255 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0x12/0x20 arch/x86/include/asm/irqflags.h:60