xt_CT: You must specify a L4 protocol and not use inversions on it xt_CT: You must specify a L4 protocol and not use inversions on it xt_CT: You must specify a L4 protocol and not use inversions on it xt_CT: You must specify a L4 protocol and not use inversions on it INFO: task syz-executor200:8325 blocked for more than 140 seconds. Not tainted 4.19.101-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor200 D27680 8325 8298 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_timeout+0x8c8/0xfc0 kernel/time/timer.c:1782 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+0x29c/0x440 kernel/sched/completion.c:136 __flush_work+0x49f/0x870 kernel/workqueue.c:2926 __cancel_work_timer+0x3bf/0x520 kernel/workqueue.c:3013 cancel_delayed_work_sync+0x1b/0x20 kernel/workqueue.c:3145 htable_destroy net/netfilter/xt_hashlimit.c:414 [inline] htable_put+0x15f/0x220 net/netfilter/xt_hashlimit.c:443 hashlimit_mt_destroy+0x56/0x70 net/netfilter/xt_hashlimit.c:979 cleanup_match+0xde/0x170 net/ipv6/netfilter/ip6_tables.c:481 find_check_entry.isra.0+0x454/0x920 net/ipv4/netfilter/ip_tables.c:567 translate_table+0xcb4/0x17d0 net/ipv4/netfilter/ip_tables.c:720 do_replace net/ipv4/netfilter/ip_tables.c:1139 [inline] do_ipt_set_ctl+0x2ef/0x492 net/ipv4/netfilter/ip_tables.c:1675 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x77/0xd0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1258 [inline] ip_setsockopt+0xdf/0x100 net/ipv4/ip_sockglue.c:1238 tcp_setsockopt net/ipv4/tcp.c:3076 [inline] tcp_setsockopt+0x8f/0xe0 net/ipv4/tcp.c:3070 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3046 __sys_setsockopt+0x17a/0x280 net/socket.c:1901 __do_sys_setsockopt net/socket.c:1912 [inline] __se_sys_setsockopt net/socket.c:1909 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1909 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x447209 Code: 6c 64 0a 00 74 72 79 69 6e 67 20 74 6f 20 64 65 6c 65 74 65 20 61 70 63 20 25 6c 64 0a 00 73 6f 6d 65 74 68 69 6e 67 00 61 70 <63> 2e 63 00 61 70 63 00 00 00 00 00 00 00 00 41 50 43 20 6d 6f 64 RSP: 002b:00007fa123e91d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000447209 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 RBP: 00000000006dbc20 R08: 00000000000003e0 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 00000000006dbc2c R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000776172 INFO: task syz-executor200:8338 blocked for more than 140 seconds. Not tainted 4.19.101-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor200 D28872 8338 8300 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:897 hashlimit_mt_check+0xa4/0xd0 net/netfilter/xt_hashlimit.c:957 xt_check_match+0x280/0x690 net/netfilter/x_tables.c:506 check_match net/ipv4/netfilter/ip_tables.c:475 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:491 [inline] find_check_entry.isra.0+0x32f/0x920 net/ipv4/netfilter/ip_tables.c:541 translate_table+0xcb4/0x17d0 net/ipv4/netfilter/ip_tables.c:720 do_replace net/ipv4/netfilter/ip_tables.c:1139 [inline] do_ipt_set_ctl+0x2ef/0x492 net/ipv4/netfilter/ip_tables.c:1675 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x77/0xd0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1258 [inline] ip_setsockopt+0xdf/0x100 net/ipv4/ip_sockglue.c:1238 tcp_setsockopt net/ipv4/tcp.c:3076 [inline] tcp_setsockopt+0x8f/0xe0 net/ipv4/tcp.c:3070 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3046 __sys_setsockopt+0x17a/0x280 net/socket.c:1901 __do_sys_setsockopt net/socket.c:1912 [inline] __se_sys_setsockopt net/socket.c:1909 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1909 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x447209 Code: 6c 64 0a 00 74 72 79 69 6e 67 20 74 6f 20 64 65 6c 65 74 65 20 61 70 63 20 25 6c 64 0a 00 73 6f 6d 65 74 68 69 6e 67 00 61 70 <63> 2e 63 00 61 70 63 00 00 00 00 00 00 00 00 41 50 43 20 6d 6f 64 RSP: 002b:00007fa123e91d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000447209 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 RBP: 00000000006dbc20 R08: 00000000000003e0 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 00000000006dbc2c R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000776172 INFO: task syz-executor200:8343 blocked for more than 140 seconds. Not tainted 4.19.101-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor200 D28040 8343 8302 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:897 hashlimit_mt_check+0xa4/0xd0 net/netfilter/xt_hashlimit.c:957 xt_check_match+0x280/0x690 net/netfilter/x_tables.c:506 check_match net/ipv4/netfilter/ip_tables.c:475 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:491 [inline] find_check_entry.isra.0+0x32f/0x920 net/ipv4/netfilter/ip_tables.c:541 translate_table+0xcb4/0x17d0 net/ipv4/netfilter/ip_tables.c:720 do_replace net/ipv4/netfilter/ip_tables.c:1139 [inline] do_ipt_set_ctl+0x2ef/0x492 net/ipv4/netfilter/ip_tables.c:1675 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x77/0xd0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1258 [inline] ip_setsockopt+0xdf/0x100 net/ipv4/ip_sockglue.c:1238 tcp_setsockopt net/ipv4/tcp.c:3076 [inline] tcp_setsockopt+0x8f/0xe0 net/ipv4/tcp.c:3070 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3046 __sys_setsockopt+0x17a/0x280 net/socket.c:1901 __do_sys_setsockopt net/socket.c:1912 [inline] __se_sys_setsockopt net/socket.c:1909 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1909 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x447209 Code: 6c 64 0a 00 74 72 79 69 6e 67 20 74 6f 20 64 65 6c 65 74 65 20 61 70 63 20 25 6c 64 0a 00 73 6f 6d 65 74 68 69 6e 67 00 61 70 <63> 2e 63 00 61 70 63 00 00 00 00 00 00 00 00 41 50 43 20 6d 6f 64 RSP: 002b:00007fa123e91d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000447209 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 RBP: 00000000006dbc20 R08: 00000000000003e0 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 00000000006dbc2c R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000776172 INFO: task syz-executor200:8340 blocked for more than 140 seconds. Not tainted 4.19.101-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor200 D28872 8340 8303 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:897 hashlimit_mt_check+0xa4/0xd0 net/netfilter/xt_hashlimit.c:957 xt_check_match+0x280/0x690 net/netfilter/x_tables.c:506 check_match net/ipv4/netfilter/ip_tables.c:475 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:491 [inline] find_check_entry.isra.0+0x32f/0x920 net/ipv4/netfilter/ip_tables.c:541 translate_table+0xcb4/0x17d0 net/ipv4/netfilter/ip_tables.c:720 do_replace net/ipv4/netfilter/ip_tables.c:1139 [inline] do_ipt_set_ctl+0x2ef/0x492 net/ipv4/netfilter/ip_tables.c:1675 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x77/0xd0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1258 [inline] ip_setsockopt+0xdf/0x100 net/ipv4/ip_sockglue.c:1238 tcp_setsockopt net/ipv4/tcp.c:3076 [inline] tcp_setsockopt+0x8f/0xe0 net/ipv4/tcp.c:3070 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3046 __sys_setsockopt+0x17a/0x280 net/socket.c:1901 __do_sys_setsockopt net/socket.c:1912 [inline] __se_sys_setsockopt net/socket.c:1909 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1909 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x447209 Code: 6c 64 0a 00 74 72 79 69 6e 67 20 74 6f 20 64 65 6c 65 74 65 20 61 70 63 20 25 6c 64 0a 00 73 6f 6d 65 74 68 69 6e 67 00 61 70 <63> 2e 63 00 61 70 63 00 00 00 00 00 00 00 00 41 50 43 20 6d 6f 64 RSP: 002b:00007fa123e91d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000447209 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 RBP: 00000000006dbc20 R08: 00000000000003e0 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 00000000006dbc2c R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000776172 INFO: task syz-executor200:8341 blocked for more than 140 seconds. Not tainted 4.19.101-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor200 D28872 8341 8299 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:897 hashlimit_mt_check+0xa4/0xd0 net/netfilter/xt_hashlimit.c:957 xt_check_match+0x280/0x690 net/netfilter/x_tables.c:506 check_match net/ipv4/netfilter/ip_tables.c:475 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:491 [inline] find_check_entry.isra.0+0x32f/0x920 net/ipv4/netfilter/ip_tables.c:541 translate_table+0xcb4/0x17d0 net/ipv4/netfilter/ip_tables.c:720 do_replace net/ipv4/netfilter/ip_tables.c:1139 [inline] do_ipt_set_ctl+0x2ef/0x492 net/ipv4/netfilter/ip_tables.c:1675 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x77/0xd0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1258 [inline] ip_setsockopt+0xdf/0x100 net/ipv4/ip_sockglue.c:1238 tcp_setsockopt net/ipv4/tcp.c:3076 [inline] tcp_setsockopt+0x8f/0xe0 net/ipv4/tcp.c:3070 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3046 __sys_setsockopt+0x17a/0x280 net/socket.c:1901 __do_sys_setsockopt net/socket.c:1912 [inline] __se_sys_setsockopt net/socket.c:1909 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1909 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x447209 Code: 6c 64 0a 00 74 72 79 69 6e 67 20 74 6f 20 64 65 6c 65 74 65 20 61 70 63 20 25 6c 64 0a 00 73 6f 6d 65 74 68 69 6e 67 00 61 70 <63> 2e 63 00 61 70 63 00 00 00 00 00 00 00 00 41 50 43 20 6d 6f 64 RSP: 002b:00007fa123e91d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000447209 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 RBP: 00000000006dbc20 R08: 00000000000003e0 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 00000000006dbc2c R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000776172 INFO: task syz-executor200:8342 blocked for more than 140 seconds. Not tainted 4.19.101-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor200 D28296 8342 8301 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:897 hashlimit_mt_check+0xa4/0xd0 net/netfilter/xt_hashlimit.c:957 xt_check_match+0x280/0x690 net/netfilter/x_tables.c:506 check_match net/ipv4/netfilter/ip_tables.c:475 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:491 [inline] find_check_entry.isra.0+0x32f/0x920 net/ipv4/netfilter/ip_tables.c:541 translate_table+0xcb4/0x17d0 net/ipv4/netfilter/ip_tables.c:720 do_replace net/ipv4/netfilter/ip_tables.c:1139 [inline] do_ipt_set_ctl+0x2ef/0x492 net/ipv4/netfilter/ip_tables.c:1675 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x77/0xd0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1258 [inline] ip_setsockopt+0xdf/0x100 net/ipv4/ip_sockglue.c:1238 tcp_setsockopt net/ipv4/tcp.c:3076 [inline] tcp_setsockopt+0x8f/0xe0 net/ipv4/tcp.c:3070 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3046 __sys_setsockopt+0x17a/0x280 net/socket.c:1901 __do_sys_setsockopt net/socket.c:1912 [inline] __se_sys_setsockopt net/socket.c:1909 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1909 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x447209 Code: 6c 64 0a 00 74 72 79 69 6e 67 20 74 6f 20 64 65 6c 65 74 65 20 61 70 63 20 25 6c 64 0a 00 73 6f 6d 65 74 68 69 6e 67 00 61 70 <63> 2e 63 00 61 70 63 00 00 00 00 00 00 00 00 41 50 43 20 6d 6f 64 RSP: 002b:00007fa123e91d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000447209 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 RBP: 00000000006dbc20 R08: 00000000000003e0 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 00000000006dbc2c R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000776172 Showing all locks held in the system: 2 locks held by kworker/1:0/19: 1 lock held by khungtaskd/1080: #0: 0000000078cc925f (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4438 1 lock held by khugepaged/1087: #0: 0000000085d06606 (pcpu_drain_mutex){+.+.}, at: drain_all_pages+0x4d/0x570 mm/page_alloc.c:2654 1 lock held by rsyslogd/8150: #0: 00000000d8b2777b (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:767 2 locks held by getty/8272: #0: 000000000e78ed46 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 0000000080e2d174 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/8273: #0: 0000000013f71695 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 0000000012522e69 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/8274: #0: 00000000d759fdba (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000003f0c5cde (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/8275: #0: 00000000be084d3d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000002aeaa42e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/8276: #0: 000000007e4dfd34 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000ce8667f8 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/8277: #0: 00000000ccd4af0b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000061162c8 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/8278: #0: 00000000efc307b4 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000003497abdf (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 1 lock held by syz-executor200/8325: #0: 00000000fec76d3f (hashlimit_mutex){+.+.}, at: htable_put+0x21/0x220 net/netfilter/xt_hashlimit.c:440 1 lock held by syz-executor200/8338: #0: 00000000fec76d3f (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:897 1 lock held by syz-executor200/8343: #0: 00000000fec76d3f (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:897 1 lock held by syz-executor200/8340: #0: 00000000fec76d3f (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:897 1 lock held by syz-executor200/8341: #0: 00000000fec76d3f (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:897 1 lock held by syz-executor200/8342: #0: 00000000fec76d3f (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:897 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1080 Comm: khungtaskd Not tainted 4.19.101-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+0x197/0x210 lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 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:203 [inline] watchdog+0x9df/0xee0 kernel/hung_task.c:287 kthread+0x354/0x420 kernel/kthread.c:246 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: 19 Comm: kworker/1:0 Not tainted 4.19.101-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_power_efficient htable_gc RIP: 0010:lockdep_hardirqs_on+0x1a/0x5d0 kernel/locking/lockdep.c:2844 Code: 8b 7d c0 e9 6b fe ff ff 0f 1f 84 00 00 00 00 00 48 c7 c0 c0 57 3c 89 55 48 ba 00 00 00 00 00 fc ff df 48 89 c1 48 89 e5 41 54 <83> e0 07 48 c1 e9 03 53 83 c0 03 49 89 fc 0f b6 14 11 38 d0 7c 08 RSP: 0018:ffff8880aa3efc10 EFLAGS: 00000093 RAX: ffffffff893c57c0 RBX: 0000000000000000 RCX: ffffffff893c57c0 RDX: dffffc0000000000 RSI: ffffffff8170472e RDI: ffffffff8140221a RBP: ffff8880aa3efc18 R08: ffff8880aa3da500 R09: fffff52000bd3c0a R10: fffff52000bd3c09 R11: ffffc90005e9e04b R12: ffffffff8609ac19 R13: ffffffff8754f321 R14: ffffffff8140221a R15: 000000000e7a5ec7 FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa123e91e78 CR3: 0000000082fa8000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_hardirqs_on+0x67/0x220 kernel/trace/trace_preemptirq.c:30 __local_bh_enable_ip+0x15a/0x270 kernel/softirq.c:194 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline] _raw_spin_unlock_bh+0x31/0x40 kernel/locking/spinlock.c:200 spin_unlock_bh include/linux/spinlock.h:374 [inline] htable_selective_cleanup+0x219/0x330 net/netfilter/xt_hashlimit.c:381 htable_gc+0x26/0xc0 net/netfilter/xt_hashlimit.c:392 process_one_work+0x989/0x1750 kernel/workqueue.c:2153 worker_thread+0x98/0xe40 kernel/workqueue.c:2296 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415