NOHZ: local_softirq_pending 08 NOHZ: local_softirq_pending 08 NOHZ: local_softirq_pending 08 NOHZ: local_softirq_pending 08 NOHZ: local_softirq_pending 08 INFO: task syz-executor.0:7339 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-executor.0 D24992 7339 1 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 xt_find_table_lock+0x3c/0x3d0 net/netfilter/x_tables.c:1092 get_info+0x116/0x560 net/ipv6/netfilter/ip6_tables.c:983 do_ipt_get_ctl+0x148/0x7e0 net/ipv4/netfilter/ip_tables.c:1698 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x6a/0xc0 net/netfilter/nf_sockopt.c:122 ip_getsockopt net/ipv4/ip_sockglue.c:1566 [inline] ip_getsockopt+0x10d/0x150 net/ipv4/ip_sockglue.c:1551 tcp_getsockopt net/ipv4/tcp.c:3249 [inline] tcp_getsockopt+0x84/0xd0 net/ipv4/tcp.c:3243 sock_common_getsockopt+0x94/0xd0 net/core/sock.c:2927 SYSC_getsockopt net/socket.c:1896 [inline] SyS_getsockopt+0x126/0x1e0 net/socket.c:1878 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45deaa RSP: 002b:00007ffda0c893c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007ffda0c893f0 RCX: 000000000045deaa RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000071de80 R08: 00007ffda0c893ec R09: 0000000000004000 R10: 00007ffda0c893f0 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000000 R14: 0000000000000000 R15: 000000000071bcc0 INFO: task syz-executor.3:7341 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-executor.3 D24992 7341 1 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 xt_find_table_lock+0x3c/0x3d0 net/netfilter/x_tables.c:1092 get_info+0x116/0x560 net/ipv6/netfilter/ip6_tables.c:983 do_ipt_get_ctl+0x148/0x7e0 net/ipv4/netfilter/ip_tables.c:1698 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x6a/0xc0 net/netfilter/nf_sockopt.c:122 ip_getsockopt net/ipv4/ip_sockglue.c:1566 [inline] ip_getsockopt+0x10d/0x150 net/ipv4/ip_sockglue.c:1551 tcp_getsockopt net/ipv4/tcp.c:3249 [inline] tcp_getsockopt+0x84/0xd0 net/ipv4/tcp.c:3243 sock_common_getsockopt+0x94/0xd0 net/core/sock.c:2927 SYSC_getsockopt net/socket.c:1896 [inline] SyS_getsockopt+0x126/0x1e0 net/socket.c:1878 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45deaa RSP: 002b:00007ffedd5f3428 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007ffedd5f3450 RCX: 000000000045deaa RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000071de80 R08: 00007ffedd5f344c R09: 0000000000004000 R10: 00007ffedd5f3450 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000000 R14: 0000000000000000 R15: 000000000071bcc0 INFO: task syz-executor.2:11577 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-executor.2 D25232 11577 1 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 xt_find_table_lock+0x3c/0x3d0 net/netfilter/x_tables.c:1092 get_info+0x116/0x560 net/ipv6/netfilter/ip6_tables.c:983 do_ipt_get_ctl+0x148/0x7e0 net/ipv4/netfilter/ip_tables.c:1698 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x6a/0xc0 net/netfilter/nf_sockopt.c:122 ip_getsockopt net/ipv4/ip_sockglue.c:1566 [inline] ip_getsockopt+0x10d/0x150 net/ipv4/ip_sockglue.c:1551 tcp_getsockopt net/ipv4/tcp.c:3249 [inline] tcp_getsockopt+0x84/0xd0 net/ipv4/tcp.c:3243 sock_common_getsockopt+0x94/0xd0 net/core/sock.c:2927 SYSC_getsockopt net/socket.c:1896 [inline] SyS_getsockopt+0x126/0x1e0 net/socket.c:1878 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45deaa RSP: 002b:00007fff7a059ee8 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007fff7a059f10 RCX: 000000000045deaa RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000071de80 R08: 00007fff7a059f0c R09: 0000000000004000 R10: 00007fff7a059f10 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000000 R14: 0000000000000000 R15: 000000000071bcc0 INFO: task syz-executor.5:12123 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-executor.5 D28944 12123 10175 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 xt_find_table_lock+0x3c/0x3d0 net/netfilter/x_tables.c:1092 __do_replace+0xa2/0x5b0 net/ipv4/netfilter/ip_tables.c:1056 do_replace net/ipv4/netfilter/ip_tables.c:1142 [inline] do_ipt_set_ctl+0x296/0x3ee 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 udp_setsockopt+0x4e/0x90 net/ipv4/udp.c:2451 ipv6_setsockopt+0x9e/0x130 net/ipv6/ipv6_sockglue.c:920 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: 0033:0x45b399 RSP: 002b:00007fe455e70c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fe455e716d4 RCX: 000000000045b399 RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000020000580 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000a06 R14: 00000000004cb681 R15: 000000000075bf2c INFO: task syz-executor.4:12149 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-executor.4 D29344 12149 7340 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 xt_find_match+0x3e/0x1e0 net/netfilter/x_tables.c:186 xt_request_find_match net/netfilter/x_tables.c:216 [inline] xt_request_find_match+0x74/0xe0 net/netfilter/x_tables.c:209 find_check_match net/ipv4/netfilter/ip_tables.c:495 [inline] find_check_entry.isra.0+0x22b/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 udp_setsockopt+0x4e/0x90 net/ipv4/udp.c:2451 ipv6_setsockopt+0x9e/0x130 net/ipv6/ipv6_sockglue.c:920 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: 0033:0x45b399 RSP: 002b:00007fe1b3139c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fe1b313a6d4 RCX: 000000000045b399 RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000580 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000a06 R14: 00000000004cb681 R15: 000000000075bfd4 Showing all locks held in the system: 1 lock held by khungtaskd/1057: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4544 2 locks held by getty/7298: #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/7299: #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/7300: #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/7301: #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/7302: #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/7303: #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/7304: #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-executor.0/7339: #0: (&xt[i].mutex){+.+.}, at: [] xt_find_table_lock+0x3c/0x3d0 net/netfilter/x_tables.c:1092 1 lock held by syz-executor.3/7341: #0: (&xt[i].mutex){+.+.}, at: [] xt_find_table_lock+0x3c/0x3d0 net/netfilter/x_tables.c:1092 1 lock held by syz-executor.2/11577: #0: (&xt[i].mutex){+.+.}, at: [] xt_find_table_lock+0x3c/0x3d0 net/netfilter/x_tables.c:1092 1 lock held by syz-executor.5/12123: #0: (&xt[i].mutex){+.+.}, at: [] xt_find_table_lock+0x3c/0x3d0 net/netfilter/x_tables.c:1092 1 lock held by syz-executor.4/12149: #0: (&xt[i].mutex){+.+.}, at: [] xt_find_match+0x3e/0x1e0 net/netfilter/x_tables.c:186 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1057 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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7343 Comm: syz-executor.1 Not tainted 4.14.170-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88805f00c500 task.stack: ffff88805f010000 RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:774 [inline] RIP: 0010:trace_softirqs_on+0x2a0/0x3c0 kernel/locking/lockdep.c:2989 RSP: 0018:ffff88805f017960 EFLAGS: 00000046 RAX: 1ffffffff0fe2ce0 RBX: ffffffff854fb684 RCX: 1ffffffff134f760 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff88805f017978 R08: 0000000000000001 R09: 0000000000000002 R10: 0000000000000000 R11: ffff88805f00c500 R12: ffff88805f00c500 R13: ffff88805f00c500 R14: ffffc90016711000 R15: ffffffff854f9a60 FS: 0000000001109940(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c430164848 CR3: 000000005f000000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __local_bh_enable_ip+0x123/0x1a0 kernel/softirq.c:173 __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 cleanup_entry+0xbf/0x230 net/ipv4/netfilter/ip_tables.c:658 __do_replace+0x3c5/0x5b0 net/ipv4/netfilter/ip_tables.c:1086 do_replace net/ipv4/netfilter/ip_tables.c:1142 [inline] do_ipt_set_ctl+0x296/0x3ee 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: 0033:0x45deca RSP: 002b:00007ffc3cfedcf8 EFLAGS: 00000202 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007ffc3cfedd20 RCX: 000000000045deca RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000071de80 R08: 0000000000000240 R09: 0000000000004000 R10: 000000000071d160 R11: 0000000000000202 R12: 0000000000000003 R13: 0000000000000000 R14: 0000000000000000 R15: 000000000071d100 Code: 00 c7 83 7c 08 00 00 00 00 00 00 5b 41 5c 41 5d 5d c3 48 c7 c0 00 67 f1 87 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 <0f> 85 ee 00 00 00 48 83 3d 72 f9 a8 06 00 0f 84 d4 00 00 00 9c