INFO: task syz-executor790:10089 blocked for more than 143 seconds. Not tainted 5.5.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor790 D28264 10089 10085 0x00000004 Call Trace: context_switch kernel/sched/core.c:3385 [inline] __schedule+0x934/0x1f90 kernel/sched/core.c:4081 schedule+0xdc/0x2b0 kernel/sched/core.c:4155 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4214 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118 hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:889 hashlimit_mt_check_v1+0x325/0x3ab net/netfilter/xt_hashlimit.c:918 xt_check_match+0x280/0x690 net/netfilter/x_tables.c:501 check_match net/ipv4/netfilter/ip_tables.c:472 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:488 [inline] find_check_entry.isra.0+0x32f/0x920 net/ipv4/netfilter/ip_tables.c:538 translate_table+0xcb4/0x17d0 net/ipv4/netfilter/ip_tables.c:717 do_replace net/ipv4/netfilter/ip_tables.c:1136 [inline] do_ipt_set_ctl+0x2fe/0x4c2 net/ipv4/netfilter/ip_tables.c:1672 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:1260 [inline] ip_setsockopt+0xdf/0x100 net/ipv4/ip_sockglue.c:1240 tcp_setsockopt net/ipv4/tcp.c:3159 [inline] tcp_setsockopt+0x8f/0xe0 net/ipv4/tcp.c:3153 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3149 __sys_setsockopt+0x261/0x4c0 net/socket.c:2130 __do_sys_setsockopt net/socket.c:2146 [inline] __se_sys_setsockopt net/socket.c:2143 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:2143 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x441c59 Code: 20 30 20 74 6f 20 32 20 2d 20 69 67 6e 6f 72 65 64 0a 00 00 00 00 00 00 00 72 73 79 73 6c 6f 67 64 3a 20 76 65 72 73 69 6f 6e <20> 25 73 2c 20 63 6f 6e 66 69 67 20 76 61 6c 69 64 61 74 69 6f 6e RSP: 002b:00007fff2d8c61a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441c59 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000004 RBP: 00000000006cc018 R08: 0000000000000318 R09: 00000000004002c8 R10: 0000000020000540 R11: 0000000000000246 R12: 00000000004029d0 R13: 0000000000402a60 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor790:10090 blocked for more than 143 seconds. Not tainted 5.5.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor790 D27792 10090 10081 0x00004004 Call Trace: context_switch kernel/sched/core.c:3385 [inline] __schedule+0x934/0x1f90 kernel/sched/core.c:4081 schedule+0xdc/0x2b0 kernel/sched/core.c:4155 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4214 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118 hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:889 hashlimit_mt_check_v1+0x325/0x3ab net/netfilter/xt_hashlimit.c:918 xt_check_match+0x280/0x690 net/netfilter/x_tables.c:501 check_match net/ipv4/netfilter/ip_tables.c:472 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:488 [inline] find_check_entry.isra.0+0x32f/0x920 net/ipv4/netfilter/ip_tables.c:538 translate_table+0xcb4/0x17d0 net/ipv4/netfilter/ip_tables.c:717 do_replace net/ipv4/netfilter/ip_tables.c:1136 [inline] do_ipt_set_ctl+0x2fe/0x4c2 net/ipv4/netfilter/ip_tables.c:1672 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:1260 [inline] ip_setsockopt+0xdf/0x100 net/ipv4/ip_sockglue.c:1240 tcp_setsockopt net/ipv4/tcp.c:3159 [inline] tcp_setsockopt+0x8f/0xe0 net/ipv4/tcp.c:3153 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3149 __sys_setsockopt+0x261/0x4c0 net/socket.c:2130 __do_sys_setsockopt net/socket.c:2146 [inline] __se_sys_setsockopt net/socket.c:2143 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:2143 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x441c59 Code: 20 30 20 74 6f 20 32 20 2d 20 69 67 6e 6f 72 65 64 0a 00 00 00 00 00 00 00 72 73 79 73 6c 6f 67 64 3a 20 76 65 72 73 69 6f 6e <20> 25 73 2c 20 63 6f 6e 66 69 67 20 76 61 6c 69 64 61 74 69 6f 6e RSP: 002b:00007fff2d8c61a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441c59 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000004 RBP: 00000000006cc018 R08: 0000000000000318 R09: 00000000004002c8 R10: 0000000020000540 R11: 0000000000000246 R12: 00000000004029d0 R13: 0000000000402a60 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor790:10091 blocked for more than 144 seconds. Not tainted 5.5.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor790 D28264 10091 10084 0x00000004 Call Trace: context_switch kernel/sched/core.c:3385 [inline] __schedule+0x934/0x1f90 kernel/sched/core.c:4081 schedule+0xdc/0x2b0 kernel/sched/core.c:4155 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4214 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118 hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:889 hashlimit_mt_check_v1+0x325/0x3ab net/netfilter/xt_hashlimit.c:918 xt_check_match+0x280/0x690 net/netfilter/x_tables.c:501 check_match net/ipv4/netfilter/ip_tables.c:472 [inline] find_check_match net/ipv4/netfilter/ip_tables.c:488 [inline] find_check_entry.isra.0+0x32f/0x920 net/ipv4/netfilter/ip_tables.c:538 translate_table+0xcb4/0x17d0 net/ipv4/netfilter/ip_tables.c:717 do_replace net/ipv4/netfilter/ip_tables.c:1136 [inline] do_ipt_set_ctl+0x2fe/0x4c2 net/ipv4/netfilter/ip_tables.c:1672 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:1260 [inline] ip_setsockopt+0xdf/0x100 net/ipv4/ip_sockglue.c:1240 tcp_setsockopt net/ipv4/tcp.c:3159 [inline] tcp_setsockopt+0x8f/0xe0 net/ipv4/tcp.c:3153 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3149 __sys_setsockopt+0x261/0x4c0 net/socket.c:2130 __do_sys_setsockopt net/socket.c:2146 [inline] __se_sys_setsockopt net/socket.c:2143 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:2143 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x441c59 Code: 20 30 20 74 6f 20 32 20 2d 20 69 67 6e 6f 72 65 64 0a 00 00 00 00 00 00 00 72 73 79 73 6c 6f 67 64 3a 20 76 65 72 73 69 6f 6e <20> 25 73 2c 20 63 6f 6e 66 69 67 20 76 61 6c 69 64 61 74 69 6f 6e RSP: 002b:00007fff2d8c61a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441c59 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000004 RBP: 00000000006cc018 R08: 0000000000000318 R09: 00000000004002c8 R10: 0000000020000540 R11: 0000000000000246 R12: 00000000004029d0 R13: 0000000000402a60 R14: 0000000000000000 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/1119: #0: ffffffff899a1340 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x279 kernel/locking/lockdep.c:5333 1 lock held by rsyslogd/9962: #0: ffff8880a70a8360 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801 2 locks held by getty/10052: #0: ffff88809351a090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc900017fb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 drivers/tty/n_tty.c:2156 2 locks held by getty/10053: #0: ffff88809757d090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc9000185b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 drivers/tty/n_tty.c:2156 2 locks held by getty/10054: #0: ffff888093576090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc900017cb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 drivers/tty/n_tty.c:2156 2 locks held by getty/10055: #0: ffff88809d761090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc9000181b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 drivers/tty/n_tty.c:2156 2 locks held by getty/10056: #0: ffff8880981dd090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc9000183b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 drivers/tty/n_tty.c:2156 2 locks held by getty/10057: #0: ffff88809777c090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc9000184b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 drivers/tty/n_tty.c:2156 2 locks held by getty/10058: #0: ffff8880a02e3090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc9000179b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 drivers/tty/n_tty.c:2156 1 lock held by syz-executor790/10087: #0: ffffffff8a558800 (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:889 1 lock held by syz-executor790/10088: 1 lock held by syz-executor790/10089: #0: ffffffff8a558800 (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:889 1 lock held by syz-executor790/10090: #0: ffffffff8a558800 (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:889 1 lock held by syz-executor790/10091: #0: ffffffff8a558800 (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:889 1 lock held by syz-executor790/10092: #0: ffffffff8a558800 (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 net/netfilter/xt_hashlimit.c:889 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1119 Comm: khungtaskd Not tainted 5.5.0-rc7-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+0x70/0xb2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x23b/0x28b 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+0xb11/0x10c0 kernel/hung_task.c:289 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 10088 Comm: syz-executor790 Not tainted 5.5.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lock_is_held_type+0xe9/0x320 kernel/locking/lockdep.c:4520 Code: 08 00 0f 84 d4 01 00 00 fa 66 0f 1f 44 00 00 65 4c 8b 24 25 c0 1e 02 00 49 8d bc 24 94 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 RSP: 0018:ffffc90002147720 EFLAGS: 00000082 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffffffff14f84f6 RDX: dffffc0000000000 RSI: 00000000ffffffff RDI: ffff888099926d94 RBP: ffffc90002147768 R08: 1ffffffff165dd79 R09: fffffbfff165dd7a R10: fffffbfff165dd79 R11: ffffffff8b2eebcf R12: ffff888099926500 R13: 0000000000000176 R14: ffffffff899a1300 R15: 0000000000000001 FS: 0000000002566880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 0000000091838000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_is_held include/linux/lockdep.h:361 [inline] ___might_sleep+0x242/0x2c0 kernel/sched/core.c:6765 htable_selective_cleanup+0x245/0x340 net/netfilter/xt_hashlimit.c:374 htable_destroy net/netfilter/xt_hashlimit.c:408 [inline] htable_put+0x174/0x220 net/netfilter/xt_hashlimit.c:435 hashlimit_mt_destroy_v1+0x50/0x70 net/netfilter/xt_hashlimit.c:964 cleanup_match+0xde/0x170 net/ipv6/netfilter/ip6_tables.c:478 find_check_entry.isra.0+0x454/0x920 net/ipv4/netfilter/ip_tables.c:564 translate_table+0xcb4/0x17d0 net/ipv4/netfilter/ip_tables.c:717 do_replace net/ipv4/netfilter/ip_tables.c:1136 [inline] do_ipt_set_ctl+0x2fe/0x4c2 net/ipv4/netfilter/ip_tables.c:1672 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:1260 [inline] ip_setsockopt+0xdf/0x100 net/ipv4/ip_sockglue.c:1240 tcp_setsockopt net/ipv4/tcp.c:3159 [inline] tcp_setsockopt+0x8f/0xe0 net/ipv4/tcp.c:3153 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3149 __sys_setsockopt+0x261/0x4c0 net/socket.c:2130 __do_sys_setsockopt net/socket.c:2146 [inline] __se_sys_setsockopt net/socket.c:2143 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:2143 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x441c59 Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fff2d8c61a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441c59 RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000004 RBP: 00000000006cc018 R08: 0000000000000318 R09: 00000000004002c8 R10: 0000000020000540 R11: 0000000000000246 R12: 00000000004029d0 R13: 0000000000402a60 R14: 0000000000000000 R15: 0000000000000000