xt_HMARK: hash modulus can't be zero xt_HMARK: hash modulus can't be zero xt_HMARK: hash modulus can't be zero xt_HMARK: hash modulus can't be zero xt_HMARK: hash modulus can't be zero INFO: task syz-executor484:7365 blocked for more than 140 seconds. Not tainted 4.14.170-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor484 D28192 7365 7307 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384 schedule+0x92/0x1c0 kernel/sched/core.c:3428 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 net/netfilter/xt_hashlimit.c:896 hashlimit_mt_check_v1+0x302/0x389 net/netfilter/xt_hashlimit.c:925 xt_check_match+0x254/0x530 net/netfilter/x_tables.c:501 check_match net/ipv4/netfilter/ip_tables.c:485 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:501 [inline] find_check_entry.isra.0+0x2f9/0x920 net/ipv4/netfilter/ip_tables.c:551 translate_table+0xb3f/0x15a0 net/ipv4/netfilter/ip_tables.c:737 do_replace net/ipv4/netfilter/ip_tables.c:1138 [inline] do_ipt_set_ctl+0x268/0x3ee net/ipv4/netfilter/ip_tables.c:1674 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1255 [inline] ip_setsockopt+0x9b/0xb0 net/ipv4/ip_sockglue.c:1240 tcp_setsockopt net/ipv4/tcp.c:2820 [inline] tcp_setsockopt+0x84/0xd0 net/ipv4/tcp.c:2814 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:2968 SYSC_setsockopt net/socket.c:1865 [inline] SyS_setsockopt+0x13c/0x210 net/socket.c:1844 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4472c9 RSP: 002b:00007fe1126d3d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 00000000004472c9 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000004 RBP: 00000000006dbc30 R08: 0000000000000318 R09: 0000000000000000 R10: 0000000020000540 R11: 0000000000000246 R12: 00000000006dbc3c R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000776172 INFO: task syz-executor484:7368 blocked for more than 140 seconds. Not tainted 4.14.170-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor484 D28392 7368 7305 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384 schedule+0x92/0x1c0 kernel/sched/core.c:3428 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 net/netfilter/xt_hashlimit.c:896 hashlimit_mt_check_v1+0x302/0x389 net/netfilter/xt_hashlimit.c:925 xt_check_match+0x254/0x530 net/netfilter/x_tables.c:501 check_match net/ipv4/netfilter/ip_tables.c:485 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:501 [inline] find_check_entry.isra.0+0x2f9/0x920 net/ipv4/netfilter/ip_tables.c:551 translate_table+0xb3f/0x15a0 net/ipv4/netfilter/ip_tables.c:737 do_replace net/ipv4/netfilter/ip_tables.c:1138 [inline] do_ipt_set_ctl+0x268/0x3ee net/ipv4/netfilter/ip_tables.c:1674 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1255 [inline] ip_setsockopt+0x9b/0xb0 net/ipv4/ip_sockglue.c:1240 tcp_setsockopt net/ipv4/tcp.c:2820 [inline] tcp_setsockopt+0x84/0xd0 net/ipv4/tcp.c:2814 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:2968 SYSC_setsockopt net/socket.c:1865 [inline] SyS_setsockopt+0x13c/0x210 net/socket.c:1844 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4472c9 RSP: 002b:00007fe1126b2d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 00000000004472c9 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000004 RBP: 00000000006dbc40 R08: 0000000000000318 R09: 0000000000000000 R10: 0000000020000540 R11: 0000000000000246 R12: 00000000006dbc4c R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000776172 INFO: task syz-executor484:7364 blocked for more than 140 seconds. Not tainted 4.14.170-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor484 D28976 7364 7308 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384 schedule+0x92/0x1c0 kernel/sched/core.c:3428 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 net/netfilter/xt_hashlimit.c:896 hashlimit_mt_check_v1+0x302/0x389 net/netfilter/xt_hashlimit.c:925 xt_check_match+0x254/0x530 net/netfilter/x_tables.c:501 check_match net/ipv4/netfilter/ip_tables.c:485 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:501 [inline] find_check_entry.isra.0+0x2f9/0x920 net/ipv4/netfilter/ip_tables.c:551 translate_table+0xb3f/0x15a0 net/ipv4/netfilter/ip_tables.c:737 do_replace net/ipv4/netfilter/ip_tables.c:1138 [inline] do_ipt_set_ctl+0x268/0x3ee net/ipv4/netfilter/ip_tables.c:1674 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1255 [inline] ip_setsockopt+0x9b/0xb0 net/ipv4/ip_sockglue.c:1240 tcp_setsockopt net/ipv4/tcp.c:2820 [inline] tcp_setsockopt+0x84/0xd0 net/ipv4/tcp.c:2814 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:2968 SYSC_setsockopt net/socket.c:1865 [inline] SyS_setsockopt+0x13c/0x210 net/socket.c:1844 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4472c9 RSP: 002b:00007fe1126f4d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 00000000004472c9 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 RBP: 00000000006dbc20 R08: 0000000000000318 R09: 0000000000000000 R10: 0000000020000540 R11: 0000000000000246 R12: 00000000006dbc2c R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000776172 INFO: task syz-executor484:7372 blocked for more than 140 seconds. Not tainted 4.14.170-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor484 D28976 7372 7308 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384 schedule+0x92/0x1c0 kernel/sched/core.c:3428 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 net/netfilter/xt_hashlimit.c:896 hashlimit_mt_check_v1+0x302/0x389 net/netfilter/xt_hashlimit.c:925 xt_check_match+0x254/0x530 net/netfilter/x_tables.c:501 check_match net/ipv4/netfilter/ip_tables.c:485 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:501 [inline] find_check_entry.isra.0+0x2f9/0x920 net/ipv4/netfilter/ip_tables.c:551 translate_table+0xb3f/0x15a0 net/ipv4/netfilter/ip_tables.c:737 do_replace net/ipv4/netfilter/ip_tables.c:1138 [inline] do_ipt_set_ctl+0x268/0x3ee net/ipv4/netfilter/ip_tables.c:1674 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1255 [inline] ip_setsockopt+0x9b/0xb0 net/ipv4/ip_sockglue.c:1240 tcp_setsockopt net/ipv4/tcp.c:2820 [inline] tcp_setsockopt+0x84/0xd0 net/ipv4/tcp.c:2814 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:2968 SYSC_setsockopt net/socket.c:1865 [inline] SyS_setsockopt+0x13c/0x210 net/socket.c:1844 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4472c9 RSP: 002b:00007fe1126b2d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 00000000004472c9 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 RBP: 00000000006dbc40 R08: 0000000000000318 R09: 0000000000000000 R10: 0000000020000540 R11: 0000000000000246 R12: 00000000006dbc4c R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000776172 INFO: task syz-executor484:7361 blocked for more than 140 seconds. Not tainted 4.14.170-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor484 D28976 7361 7306 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384 schedule+0x92/0x1c0 kernel/sched/core.c:3428 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 net/netfilter/xt_hashlimit.c:896 hashlimit_mt_check_v1+0x302/0x389 net/netfilter/xt_hashlimit.c:925 xt_check_match+0x254/0x530 net/netfilter/x_tables.c:501 check_match net/ipv4/netfilter/ip_tables.c:485 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:501 [inline] find_check_entry.isra.0+0x2f9/0x920 net/ipv4/netfilter/ip_tables.c:551 translate_table+0xb3f/0x15a0 net/ipv4/netfilter/ip_tables.c:737 do_replace net/ipv4/netfilter/ip_tables.c:1138 [inline] do_ipt_set_ctl+0x268/0x3ee net/ipv4/netfilter/ip_tables.c:1674 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1255 [inline] ip_setsockopt+0x9b/0xb0 net/ipv4/ip_sockglue.c:1240 tcp_setsockopt net/ipv4/tcp.c:2820 [inline] tcp_setsockopt+0x84/0xd0 net/ipv4/tcp.c:2814 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:2968 SYSC_setsockopt net/socket.c:1865 [inline] SyS_setsockopt+0x13c/0x210 net/socket.c:1844 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4472c9 RSP: 002b:00007fe1126f4d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 00000000004472c9 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 RBP: 00000000006dbc20 R08: 0000000000000318 R09: 0000000000000000 R10: 0000000020000540 R11: 0000000000000246 R12: 00000000006dbc2c R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000776172 INFO: task syz-executor484:7370 blocked for more than 140 seconds. Not tainted 4.14.170-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor484 D28392 7370 7306 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384 schedule+0x92/0x1c0 kernel/sched/core.c:3428 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 net/netfilter/xt_hashlimit.c:896 hashlimit_mt_check_v1+0x302/0x389 net/netfilter/xt_hashlimit.c:925 xt_check_match+0x254/0x530 net/netfilter/x_tables.c:501 check_match net/ipv4/netfilter/ip_tables.c:485 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:501 [inline] find_check_entry.isra.0+0x2f9/0x920 net/ipv4/netfilter/ip_tables.c:551 translate_table+0xb3f/0x15a0 net/ipv4/netfilter/ip_tables.c:737 do_replace net/ipv4/netfilter/ip_tables.c:1138 [inline] do_ipt_set_ctl+0x268/0x3ee net/ipv4/netfilter/ip_tables.c:1674 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1255 [inline] ip_setsockopt+0x9b/0xb0 net/ipv4/ip_sockglue.c:1240 tcp_setsockopt net/ipv4/tcp.c:2820 [inline] tcp_setsockopt+0x84/0xd0 net/ipv4/tcp.c:2814 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:2968 SYSC_setsockopt net/socket.c:1865 [inline] SyS_setsockopt+0x13c/0x210 net/socket.c:1844 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4472c9 RSP: 002b:00007fe1126b2d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 00000000004472c9 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000004 RBP: 00000000006dbc40 R08: 0000000000000318 R09: 0000000000000000 R10: 0000000020000540 R11: 0000000000000246 R12: 00000000006dbc4c R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000776172 INFO: task syz-executor484:7362 blocked for more than 140 seconds. Not tainted 4.14.170-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor484 D28976 7362 7304 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384 schedule+0x92/0x1c0 kernel/sched/core.c:3428 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 net/netfilter/xt_hashlimit.c:896 hashlimit_mt_check_v1+0x302/0x389 net/netfilter/xt_hashlimit.c:925 xt_check_match+0x254/0x530 net/netfilter/x_tables.c:501 check_match net/ipv4/netfilter/ip_tables.c:485 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:501 [inline] find_check_entry.isra.0+0x2f9/0x920 net/ipv4/netfilter/ip_tables.c:551 translate_table+0xb3f/0x15a0 net/ipv4/netfilter/ip_tables.c:737 do_replace net/ipv4/netfilter/ip_tables.c:1138 [inline] do_ipt_set_ctl+0x268/0x3ee net/ipv4/netfilter/ip_tables.c:1674 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1255 [inline] ip_setsockopt+0x9b/0xb0 net/ipv4/ip_sockglue.c:1240 tcp_setsockopt net/ipv4/tcp.c:2820 [inline] tcp_setsockopt+0x84/0xd0 net/ipv4/tcp.c:2814 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:2968 SYSC_setsockopt net/socket.c:1865 [inline] SyS_setsockopt+0x13c/0x210 net/socket.c:1844 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4472c9 RSP: 002b:00007fe1126f4d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 00000000004472c9 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 RBP: 00000000006dbc20 R08: 0000000000000318 R09: 0000000000000000 R10: 0000000020000540 R11: 0000000000000246 R12: 00000000006dbc2c R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000776172 INFO: task syz-executor484:7374 blocked for more than 140 seconds. Not tainted 4.14.170-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor484 D28192 7374 7304 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384 schedule+0x92/0x1c0 kernel/sched/core.c:3428 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 net/netfilter/xt_hashlimit.c:896 hashlimit_mt_check_v1+0x302/0x389 net/netfilter/xt_hashlimit.c:925 xt_check_match+0x254/0x530 net/netfilter/x_tables.c:501 check_match net/ipv4/netfilter/ip_tables.c:485 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:501 [inline] find_check_entry.isra.0+0x2f9/0x920 net/ipv4/netfilter/ip_tables.c:551 translate_table+0xb3f/0x15a0 net/ipv4/netfilter/ip_tables.c:737 do_replace net/ipv4/netfilter/ip_tables.c:1138 [inline] do_ipt_set_ctl+0x268/0x3ee net/ipv4/netfilter/ip_tables.c:1674 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1255 [inline] ip_setsockopt+0x9b/0xb0 net/ipv4/ip_sockglue.c:1240 tcp_setsockopt net/ipv4/tcp.c:2820 [inline] tcp_setsockopt+0x84/0xd0 net/ipv4/tcp.c:2814 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:2968 SYSC_setsockopt net/socket.c:1865 [inline] SyS_setsockopt+0x13c/0x210 net/socket.c:1844 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4472c9 RSP: 002b:00007fe1126b2d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 00000000004472c9 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000004 RBP: 00000000006dbc40 R08: 0000000000000318 R09: 0000000000000000 R10: 0000000020000540 R11: 0000000000000246 R12: 00000000006dbc4c R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000776172 INFO: task syz-executor484:7366 blocked for more than 140 seconds. Not tainted 4.14.170-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor484 D28392 7366 7303 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384 schedule+0x92/0x1c0 kernel/sched/core.c:3428 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 net/netfilter/xt_hashlimit.c:896 hashlimit_mt_check_v1+0x302/0x389 net/netfilter/xt_hashlimit.c:925 xt_check_match+0x254/0x530 net/netfilter/x_tables.c:501 check_match net/ipv4/netfilter/ip_tables.c:485 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:501 [inline] find_check_entry.isra.0+0x2f9/0x920 net/ipv4/netfilter/ip_tables.c:551 translate_table+0xb3f/0x15a0 net/ipv4/netfilter/ip_tables.c:737 do_replace net/ipv4/netfilter/ip_tables.c:1138 [inline] do_ipt_set_ctl+0x268/0x3ee net/ipv4/netfilter/ip_tables.c:1674 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1255 [inline] ip_setsockopt+0x9b/0xb0 net/ipv4/ip_sockglue.c:1240 tcp_setsockopt net/ipv4/tcp.c:2820 [inline] tcp_setsockopt+0x84/0xd0 net/ipv4/tcp.c:2814 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:2968 SYSC_setsockopt net/socket.c:1865 [inline] SyS_setsockopt+0x13c/0x210 net/socket.c:1844 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4472c9 RSP: 002b:00007fe1126f4d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 00000000004472c9 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 RBP: 00000000006dbc20 R08: 0000000000000318 R09: 0000000000000000 R10: 0000000020000540 R11: 0000000000000246 R12: 00000000006dbc2c R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000776172 INFO: task syz-executor484:7376 blocked for more than 140 seconds. Not tainted 4.14.170-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor484 D28976 7376 7303 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384 schedule+0x92/0x1c0 kernel/sched/core.c:3428 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 net/netfilter/xt_hashlimit.c:896 hashlimit_mt_check_v1+0x302/0x389 net/netfilter/xt_hashlimit.c:925 xt_check_match+0x254/0x530 net/netfilter/x_tables.c:501 check_match net/ipv4/netfilter/ip_tables.c:485 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:501 [inline] find_check_entry.isra.0+0x2f9/0x920 net/ipv4/netfilter/ip_tables.c:551 translate_table+0xb3f/0x15a0 net/ipv4/netfilter/ip_tables.c:737 do_replace net/ipv4/netfilter/ip_tables.c:1138 [inline] do_ipt_set_ctl+0x268/0x3ee net/ipv4/netfilter/ip_tables.c:1674 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1255 [inline] ip_setsockopt+0x9b/0xb0 net/ipv4/ip_sockglue.c:1240 tcp_setsockopt net/ipv4/tcp.c:2820 [inline] tcp_setsockopt+0x84/0xd0 net/ipv4/tcp.c:2814 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:2968 SYSC_setsockopt net/socket.c:1865 [inline] SyS_setsockopt+0x13c/0x210 net/socket.c:1844 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4472c9 RSP: 002b:00007fe1126b2d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 00000000004472c9 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 RBP: 00000000006dbc40 R08: 0000000000000318 R09: 0000000000000000 R10: 0000000020000540 R11: 0000000000000246 R12: 00000000006dbc4c R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000776172 Showing all locks held in the system: 1 lock held by khungtaskd/1055: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4544 2 locks held by getty/7275: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156 2 locks held by getty/7276: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156 2 locks held by getty/7277: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156 2 locks held by getty/7278: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156 2 locks held by getty/7279: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156 2 locks held by getty/7280: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156 2 locks held by getty/7281: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156 1 lock held by syz-executor484/7365: #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 net/netfilter/xt_hashlimit.c:896 1 lock held by syz-executor484/7368: #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 net/netfilter/xt_hashlimit.c:896 1 lock held by syz-executor484/7364: #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 net/netfilter/xt_hashlimit.c:896 1 lock held by syz-executor484/7372: #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 net/netfilter/xt_hashlimit.c:896 1 lock held by syz-executor484/7361: #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 net/netfilter/xt_hashlimit.c:896 1 lock held by syz-executor484/7370: #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 net/netfilter/xt_hashlimit.c:896 1 lock held by syz-executor484/7362: #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 net/netfilter/xt_hashlimit.c:896 1 lock held by syz-executor484/7374: #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 net/netfilter/xt_hashlimit.c:896 1 lock held by syz-executor484/7366: #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 net/netfilter/xt_hashlimit.c:896 1 lock held by syz-executor484/7376: #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 net/netfilter/xt_hashlimit.c:896 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1055 Comm: khungtaskd Not tainted 4.14.170-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x142/0x197 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x94 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x141/0x189 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:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5e7/0xb90 kernel/hung_task.c:274 kthread+0x319/0x430 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 7356 Comm: syz-executor484 Not tainted 4.14.170-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88808df025c0 task.stack: ffff888071b88000 RIP: 0010:trace_hardirqs_on_caller+0x6b/0x590 kernel/locking/lockdep.c:2891 RSP: 0018:ffff888071b8f820 EFLAGS: 00000803 RAX: dffffc0000000000 RBX: ffff88808df025c0 RCX: 1ffffffff1067aa8 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88808df02e3c RBP: ffff888071b8f830 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: ffff88808df025c0 R12: ffffffff8138d779 R13: dffffc0000000000 R14: ffffc90005e2c000 R15: ffffffff854f9a60 FS: 00007fe1126f5700(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4500005198 CR3: 000000009faeb000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_hardirqs_on+0xd/0x10 kernel/locking/lockdep.c:2933 __local_bh_enable_ip+0x99/0x1a0 kernel/softirq.c:190 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline] _raw_spin_unlock_bh+0x31/0x40 kernel/locking/spinlock.c:208 spin_unlock_bh include/linux/spinlock.h:362 [inline] htable_selective_cleanup+0x204/0x300 net/netfilter/xt_hashlimit.c:381 htable_destroy net/netfilter/xt_hashlimit.c:416 [inline] htable_put+0x164/0x210 net/netfilter/xt_hashlimit.c:443 hashlimit_mt_destroy_v1+0x50/0x70 net/netfilter/xt_hashlimit.c:971 cleanup_match+0xc2/0x140 net/ipv6/netfilter/ip6_tables.c:491 find_check_entry.isra.0+0x3fe/0x920 net/ipv4/netfilter/ip_tables.c:577 translate_table+0xb3f/0x15a0 net/ipv4/netfilter/ip_tables.c:737 do_replace net/ipv4/netfilter/ip_tables.c:1138 [inline] do_ipt_set_ctl+0x268/0x3ee net/ipv4/netfilter/ip_tables.c:1674 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1255 [inline] ip_setsockopt+0x9b/0xb0 net/ipv4/ip_sockglue.c:1240 tcp_setsockopt net/ipv4/tcp.c:2820 [inline] tcp_setsockopt+0x84/0xd0 net/ipv4/tcp.c:2814 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:2968 SYSC_setsockopt net/socket.c:1865 [inline] SyS_setsockopt+0x13c/0x210 net/socket.c:1844 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4472c9 RSP: 002b:00007fe1126f4d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 00000000004472c9 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 RBP: 00000000006dbc20 R08: 0000000000000318 R09: 0000000000000000 R10: 0000000020000540 R11: 0000000000000246 R12: 00000000006dbc2c R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000776172 Code: 0f 84 68 02 00 00 65 48 8b 1c 25 40 ee 01 00 48 8d bb 7c 08 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 19 04 00 00