[ 83.358608][ T27] audit: type=1800 audit(1581405235.659:25): pid=9801 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 84.437177][ T27] kauditd_printk_skb: 3 callbacks suppressed [ 84.437191][ T27] audit: type=1800 audit(1581405236.729:29): pid=9801 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 84.464125][ T27] audit: type=1800 audit(1581405236.729:30): pid=9801 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.35' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 811.036192][ T9973] xt_hashlimit: overflow, try lower: 0/0 [ 811.038973][ T9972] xt_hashlimit: overflow, try lower: 0/0 [ 811.042259][ T9966] xt_hashlimit: overflow, try lower: 0/0 [ 811.049049][ T9975] xt_hashlimit: overflow, try lower: 0/0 [ 811.059411][ T9976] xt_hashlimit: overflow, try lower: 0/0 [ 811.060760][ T9978] xt_hashlimit: overflow, try lower: 0/0 [ 958.457864][ T1137] INFO: task syz-executor180:9984 blocked for more than 143 seconds. [ 958.466104][ T1137] Not tainted 5.5.0-syzkaller #0 [ 958.472645][ T1137] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 958.481603][ T1137] syz-executor180 D27792 9984 9959 0x00004004 [ 958.488136][ T1137] Call Trace: [ 958.491704][ T1137] __schedule+0x934/0x1f90 [ 958.496144][ T1137] ? __sched_text_start+0x8/0x8 [ 958.501313][ T1137] ? lock_downgrade+0x920/0x920 [ 958.506196][ T1137] ? rwlock_bug.part.0+0x90/0x90 [ 958.512278][ T1137] schedule+0xdc/0x2b0 [ 958.516386][ T1137] schedule_preempt_disabled+0x13/0x20 [ 958.522108][ T1137] __mutex_lock+0x7ab/0x13c0 [ 958.526826][ T1137] ? hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 958.533614][ T1137] ? mutex_trylock+0x2d0/0x2d0 [ 958.538583][ T1137] ? mark_held_locks+0xf0/0xf0 [ 958.543386][ T1137] ? mark_held_locks+0xf0/0xf0 [ 958.548656][ T1137] ? __kasan_check_read+0x11/0x20 [ 958.553709][ T1137] ? mark_lock+0xc2/0x1220 [ 958.558450][ T1137] mutex_lock_nested+0x16/0x20 [ 958.563334][ T1137] ? mutex_lock_nested+0x16/0x20 [ 958.568523][ T1137] hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 958.574888][ T1137] hashlimit_mt_check_v2+0x327/0x3b0 [ 958.580436][ T1137] ? hashlimit_mt_check+0xd0/0xd0 [ 958.588756][ T1137] ? lock_downgrade+0x920/0x920 [ 958.593745][ T1137] ? xt_find_match+0xa6/0x280 [ 958.598688][ T1137] ? mutex_trylock+0x2d0/0x2d0 [ 958.603541][ T1137] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 958.610639][ T1137] ? hashlimit_mt_check+0xd0/0xd0 [ 958.615676][ T1137] xt_check_match+0x280/0x690 [ 958.620607][ T1137] ? xt_check_target+0x690/0x690 [ 958.625623][ T1137] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 958.632240][ T1137] ? mutex_unlock+0xd/0x10 [ 958.636670][ T1137] ? xt_find_match+0x73/0x280 [ 958.642577][ T1137] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 958.649116][ T1137] find_check_entry.isra.0+0x389/0x9d0 [ 958.654742][ T1137] ? __do_replace+0x950/0x950 [ 958.659724][ T1137] ? lockdep_hardirqs_on+0x421/0x5e0 [ 958.665165][ T1137] ? trace_hardirqs_on+0x67/0x240 [ 958.670703][ T1137] ? kvfree+0x4a/0x60 [ 958.674734][ T1137] translate_table+0xd15/0x1860 [ 958.679975][ T1137] ? compat_do_ip6t_get_ctl+0x9a0/0x9a0 [ 958.685564][ T1137] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 958.692346][ T1137] ? _copy_from_user+0x12c/0x1a0 [ 958.697402][ T1137] do_ip6t_set_ctl+0x2fe/0x4c8 [ 958.702523][ T1137] ? compat_do_ip6t_set_ctl+0x170/0x170 [ 958.708463][ T1137] ? mutex_unlock+0xd/0x10 [ 958.712975][ T1137] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 958.719293][ T1137] nf_setsockopt+0x77/0xd0 [ 958.723813][ T1137] ipv6_setsockopt+0x147/0x180 [ 958.728828][ T1137] rawv6_setsockopt+0x5e/0x150 [ 958.733711][ T1137] sock_common_setsockopt+0x94/0xd0 [ 958.739182][ T1137] __sys_setsockopt+0x261/0x4c0 [ 958.744051][ T1137] ? sock_create_kern+0x50/0x50 [ 958.749095][ T1137] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 958.754739][ T1137] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 958.760660][ T1137] ? do_syscall_64+0x26/0x790 [ 958.765357][ T1137] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 958.772577][ T1137] ? do_syscall_64+0x26/0x790 [ 958.777278][ T1137] __x64_sys_setsockopt+0xbe/0x150 [ 958.782609][ T1137] do_syscall_64+0xfa/0x790 [ 958.787299][ T1137] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 958.793964][ T1137] RIP: 0033:0x446759 [ 958.798093][ T1137] Code: 75 67 49 6e 66 6f 4f 6e 45 78 69 74 20 28 6e 6f 74 20 79 65 74 20 69 6d 70 6c 65 6d 65 6e 74 65 64 29 0a 4e 6f 4c 6f 67 54 69 <6d> 65 73 74 61 6d 70 0a 4e 6f 73 74 64 6f 6f 75 74 0a 66 69 6c 65 [ 958.817965][ T1137] RSP: 002b:00007f8a296d6da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 958.826385][ T1137] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446759 [ 958.834544][ T1137] RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 [ 958.842716][ T1137] RBP: 00000000006dbc20 R08: 0000000000000480 R09: 0000000000000000 [ 958.850922][ T1137] R10: 0000000020000080 R11: 0000000000000246 R12: 00000000006dbc2c [ 958.859248][ T1137] R13: 0000000020000080 R14: 00000000004ae608 R15: 000000000000002d [ 958.867281][ T1137] INFO: task syz-executor180:9982 blocked for more than 143 seconds. [ 958.875622][ T1137] Not tainted 5.5.0-syzkaller #0 [ 958.881405][ T1137] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 958.890569][ T1137] syz-executor180 D28664 9982 9960 0x00004004 [ 958.896915][ T1137] Call Trace: [ 958.901470][ T1137] __schedule+0x934/0x1f90 [ 958.905930][ T1137] ? __sched_text_start+0x8/0x8 [ 958.911015][ T1137] ? lock_downgrade+0x920/0x920 [ 958.915882][ T1137] ? rwlock_bug.part.0+0x90/0x90 [ 958.921108][ T1137] schedule+0xdc/0x2b0 [ 958.925207][ T1137] schedule_preempt_disabled+0x13/0x20 [ 958.930975][ T1137] __mutex_lock+0x7ab/0x13c0 [ 958.935608][ T1137] ? hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 958.942411][ T1137] ? mutex_trylock+0x2d0/0x2d0 [ 958.947199][ T1137] ? mark_held_locks+0xf0/0xf0 [ 958.952179][ T1137] ? mark_held_locks+0xf0/0xf0 [ 958.956954][ T1137] ? __kasan_check_read+0x11/0x20 [ 958.962262][ T1137] ? mark_lock+0xc2/0x1220 [ 958.966726][ T1137] mutex_lock_nested+0x16/0x20 [ 958.971727][ T1137] ? mutex_lock_nested+0x16/0x20 [ 958.976800][ T1137] hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 958.983435][ T1137] hashlimit_mt_check_v2+0x327/0x3b0 [ 958.988948][ T1137] ? hashlimit_mt_check+0xd0/0xd0 [ 958.993991][ T1137] ? lock_downgrade+0x920/0x920 [ 958.999107][ T1137] ? xt_find_match+0xa6/0x280 [ 959.003803][ T1137] ? mutex_trylock+0x2d0/0x2d0 [ 959.008918][ T1137] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 959.015095][ T1137] ? hashlimit_mt_check+0xd0/0xd0 [ 959.020377][ T1137] xt_check_match+0x280/0x690 [ 959.025072][ T1137] ? xt_check_target+0x690/0x690 [ 959.031257][ T1137] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 959.037546][ T1137] ? mutex_unlock+0xd/0x10 [ 959.042245][ T1137] ? xt_find_match+0x73/0x280 [ 959.046943][ T1137] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 959.053406][ T1137] find_check_entry.isra.0+0x389/0x9d0 [ 959.059122][ T1137] ? __do_replace+0x950/0x950 [ 959.063833][ T1137] ? lockdep_hardirqs_on+0x421/0x5e0 [ 959.069370][ T1137] ? trace_hardirqs_on+0x67/0x240 [ 959.074615][ T1137] ? kvfree+0x4a/0x60 [ 959.078905][ T1137] translate_table+0xd15/0x1860 [ 959.083903][ T1137] ? compat_do_ip6t_get_ctl+0x9a0/0x9a0 [ 959.089657][ T1137] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 959.095916][ T1137] ? _copy_from_user+0x12c/0x1a0 [ 959.101108][ T1137] do_ip6t_set_ctl+0x2fe/0x4c8 [ 959.105902][ T1137] ? compat_do_ip6t_set_ctl+0x170/0x170 [ 959.111677][ T1137] ? mutex_unlock+0xd/0x10 [ 959.116100][ T1137] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 959.122350][ T1137] nf_setsockopt+0x77/0xd0 [ 959.126912][ T1137] ipv6_setsockopt+0x147/0x180 [ 959.131898][ T1137] rawv6_setsockopt+0x5e/0x150 [ 959.136819][ T1137] sock_common_setsockopt+0x94/0xd0 [ 959.142411][ T1137] __sys_setsockopt+0x261/0x4c0 [ 959.147284][ T1137] ? sock_create_kern+0x50/0x50 [ 959.152442][ T1137] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 959.159219][ T1137] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 959.164703][ T1137] ? do_syscall_64+0x26/0x790 [ 959.169599][ T1137] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 959.175711][ T1137] ? do_syscall_64+0x26/0x790 [ 959.180641][ T1137] __x64_sys_setsockopt+0xbe/0x150 [ 959.185854][ T1137] do_syscall_64+0xfa/0x790 [ 959.190729][ T1137] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 959.196640][ T1137] RIP: 0033:0x446759 [ 959.200931][ T1137] Code: 75 67 49 6e 66 6f 4f 6e 45 78 69 74 20 28 6e 6f 74 20 79 65 74 20 69 6d 70 6c 65 6d 65 6e 74 65 64 29 0a 4e 6f 4c 6f 67 54 69 <6d> 65 73 74 61 6d 70 0a 4e 6f 73 74 64 6f 6f 75 74 0a 66 69 6c 65 [ 959.221609][ T1137] RSP: 002b:00007f8a296d6da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 959.230234][ T1137] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446759 [ 959.238488][ T1137] RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 [ 959.246476][ T1137] RBP: 00000000006dbc20 R08: 0000000000000480 R09: 0000000000000000 [ 959.254806][ T1137] R10: 0000000020000080 R11: 0000000000000246 R12: 00000000006dbc2c [ 959.262981][ T1137] R13: 0000000020000080 R14: 00000000004ae608 R15: 000000000000002d [ 959.271312][ T1137] INFO: task syz-executor180:9983 blocked for more than 144 seconds. [ 959.279568][ T1137] Not tainted 5.5.0-syzkaller #0 [ 959.285033][ T1137] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 959.294839][ T1137] syz-executor180 D28104 9983 9963 0x00000004 [ 959.301393][ T1137] Call Trace: [ 959.304749][ T1137] __schedule+0x934/0x1f90 [ 959.309461][ T1137] ? __sched_text_start+0x8/0x8 [ 959.314337][ T1137] ? lock_downgrade+0x920/0x920 [ 959.319487][ T1137] ? rwlock_bug.part.0+0x90/0x90 [ 959.324458][ T1137] schedule+0xdc/0x2b0 [ 959.328759][ T1137] schedule_preempt_disabled+0x13/0x20 [ 959.334237][ T1137] __mutex_lock+0x7ab/0x13c0 [ 959.339086][ T1137] ? hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 959.345621][ T1137] ? mutex_trylock+0x2d0/0x2d0 [ 959.350602][ T1137] ? mark_held_locks+0xf0/0xf0 [ 959.355460][ T1137] ? mark_held_locks+0xf0/0xf0 [ 959.360493][ T1137] ? __kasan_check_read+0x11/0x20 [ 959.365528][ T1137] ? mark_lock+0xc2/0x1220 [ 959.370181][ T1137] mutex_lock_nested+0x16/0x20 [ 959.374968][ T1137] ? mutex_lock_nested+0x16/0x20 [ 959.380149][ T1137] hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 959.386535][ T1137] hashlimit_mt_check_v2+0x327/0x3b0 [ 959.392062][ T1137] ? hashlimit_mt_check+0xd0/0xd0 [ 959.397106][ T1137] ? lock_downgrade+0x920/0x920 [ 959.402225][ T1137] ? xt_find_match+0xa6/0x280 [ 959.406928][ T1137] ? mutex_trylock+0x2d0/0x2d0 [ 959.411928][ T1137] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 959.419310][ T1137] ? hashlimit_mt_check+0xd0/0xd0 [ 959.424379][ T1137] xt_check_match+0x280/0x690 [ 959.429277][ T1137] ? xt_check_target+0x690/0x690 [ 959.434240][ T1137] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 959.440731][ T1137] ? mutex_unlock+0xd/0x10 [ 959.445166][ T1137] ? xt_find_match+0x73/0x280 [ 959.450061][ T1137] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 959.456329][ T1137] find_check_entry.isra.0+0x389/0x9d0 [ 959.462197][ T1137] ? __do_replace+0x950/0x950 [ 959.466901][ T1137] ? lockdep_hardirqs_on+0x421/0x5e0 [ 959.472410][ T1137] ? trace_hardirqs_on+0x67/0x240 [ 959.477452][ T1137] ? kvfree+0x4a/0x60 [ 959.481975][ T1137] translate_table+0xd15/0x1860 [ 959.486891][ T1137] ? compat_do_ip6t_get_ctl+0x9a0/0x9a0 [ 959.492905][ T1137] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 959.500052][ T1137] ? _copy_from_user+0x12c/0x1a0 [ 959.505108][ T1137] do_ip6t_set_ctl+0x2fe/0x4c8 [ 959.510265][ T1137] ? compat_do_ip6t_set_ctl+0x170/0x170 [ 959.515861][ T1137] ? mutex_unlock+0xd/0x10 [ 959.520686][ T1137] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 959.526694][ T1137] nf_setsockopt+0x77/0xd0 [ 959.531539][ T1137] ipv6_setsockopt+0x147/0x180 [ 959.536335][ T1137] rawv6_setsockopt+0x5e/0x150 [ 959.541760][ T1137] sock_common_setsockopt+0x94/0xd0 [ 959.547080][ T1137] __sys_setsockopt+0x261/0x4c0 [ 959.553311][ T1137] ? sock_create_kern+0x50/0x50 [ 959.558665][ T1137] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 959.564373][ T1137] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 959.570452][ T1137] ? do_syscall_64+0x26/0x790 [ 959.575263][ T1137] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 959.581840][ T1137] ? do_syscall_64+0x26/0x790 [ 959.586552][ T1137] __x64_sys_setsockopt+0xbe/0x150 [ 959.592173][ T1137] do_syscall_64+0xfa/0x790 [ 959.596704][ T1137] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 959.603136][ T1137] RIP: 0033:0x446759 [ 959.607063][ T1137] Code: 75 67 49 6e 66 6f 4f 6e 45 78 69 74 20 28 6e 6f 74 20 79 65 74 20 69 6d 70 6c 65 6d 65 6e 74 65 64 29 0a 4e 6f 4c 6f 67 54 69 <6d> 65 73 74 61 6d 70 0a 4e 6f 73 74 64 6f 6f 75 74 0a 66 69 6c 65 [ 959.627140][ T1137] RSP: 002b:00007f8a296d6da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 959.635972][ T1137] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446759 [ 959.644368][ T1137] RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 [ 959.652646][ T1137] RBP: 00000000006dbc20 R08: 0000000000000480 R09: 0000000000000000 [ 959.661036][ T1137] R10: 0000000020000080 R11: 0000000000000246 R12: 00000000006dbc2c [ 959.669431][ T1137] R13: 0000000020000080 R14: 00000000004ae608 R15: 000000000000002d [ 959.677492][ T1137] INFO: task syz-executor180:9987 blocked for more than 144 seconds. [ 959.688551][ T1137] Not tainted 5.5.0-syzkaller #0 [ 959.694018][ T1137] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 959.703181][ T1137] syz-executor180 D27384 9987 9964 0x00004004 [ 959.710132][ T1137] Call Trace: [ 959.713473][ T1137] __schedule+0x934/0x1f90 [ 959.718386][ T1137] ? __sched_text_start+0x8/0x8 [ 959.723260][ T1137] ? lock_downgrade+0x920/0x920 [ 959.728554][ T1137] ? rwlock_bug.part.0+0x90/0x90 [ 959.733529][ T1137] schedule+0xdc/0x2b0 [ 959.738060][ T1137] schedule_preempt_disabled+0x13/0x20 [ 959.743551][ T1137] __mutex_lock+0x7ab/0x13c0 [ 959.748593][ T1137] ? hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 959.755121][ T1137] ? mutex_trylock+0x2d0/0x2d0 [ 959.760288][ T1137] ? mark_held_locks+0xf0/0xf0 [ 959.765074][ T1137] ? mark_held_locks+0xf0/0xf0 [ 959.770168][ T1137] ? __kasan_check_read+0x11/0x20 [ 959.775210][ T1137] ? mark_lock+0xc2/0x1220 [ 959.780052][ T1137] mutex_lock_nested+0x16/0x20 [ 959.784912][ T1137] ? mutex_lock_nested+0x16/0x20 [ 959.790399][ T1137] hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 959.796784][ T1137] hashlimit_mt_check_v2+0x327/0x3b0 [ 959.802519][ T1137] ? hashlimit_mt_check+0xd0/0xd0 [ 959.807977][ T1137] ? lock_downgrade+0x920/0x920 [ 959.812856][ T1137] ? xt_find_match+0xa6/0x280 [ 959.817557][ T1137] ? mutex_trylock+0x2d0/0x2d0 [ 959.823743][ T1137] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 959.831283][ T1137] ? hashlimit_mt_check+0xd0/0xd0 [ 959.837266][ T1137] xt_check_match+0x280/0x690 [ 959.842373][ T1137] ? xt_check_target+0x690/0x690 [ 959.847328][ T1137] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 959.854167][ T1137] ? mutex_unlock+0xd/0x10 [ 959.858974][ T1137] ? xt_find_match+0x73/0x280 [ 959.863692][ T1137] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 959.870861][ T1137] find_check_entry.isra.0+0x389/0x9d0 [ 959.876354][ T1137] ? __do_replace+0x950/0x950 [ 959.881475][ T1137] ? lockdep_hardirqs_on+0x421/0x5e0 [ 959.886898][ T1137] ? trace_hardirqs_on+0x67/0x240 [ 959.892343][ T1137] ? kvfree+0x4a/0x60 [ 959.896348][ T1137] translate_table+0xd15/0x1860 [ 959.902190][ T1137] ? compat_do_ip6t_get_ctl+0x9a0/0x9a0 [ 959.908203][ T1137] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 959.914509][ T1137] ? _copy_from_user+0x12c/0x1a0 [ 959.920066][ T1137] do_ip6t_set_ctl+0x2fe/0x4c8 [ 959.924871][ T1137] ? compat_do_ip6t_set_ctl+0x170/0x170 [ 959.931037][ T1137] ? mutex_unlock+0xd/0x10 [ 959.935530][ T1137] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 959.941984][ T1137] nf_setsockopt+0x77/0xd0 [ 959.946456][ T1137] ipv6_setsockopt+0x147/0x180 [ 959.952812][ T1137] rawv6_setsockopt+0x5e/0x150 [ 959.958212][ T1137] sock_common_setsockopt+0x94/0xd0 [ 959.963453][ T1137] __sys_setsockopt+0x261/0x4c0 [ 959.968807][ T1137] ? sock_create_kern+0x50/0x50 [ 959.973694][ T1137] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 959.979677][ T1137] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 959.985154][ T1137] ? do_syscall_64+0x26/0x790 [ 959.990610][ T1137] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 959.996705][ T1137] ? do_syscall_64+0x26/0x790 [ 960.001847][ T1137] __x64_sys_setsockopt+0xbe/0x150 [ 960.007003][ T1137] do_syscall_64+0xfa/0x790 [ 960.011969][ T1137] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 960.018279][ T1137] RIP: 0033:0x446759 [ 960.022221][ T1137] Code: 75 67 49 6e 66 6f 4f 6e 45 78 69 74 20 28 6e 6f 74 20 79 65 74 20 69 6d 70 6c 65 6d 65 6e 74 65 64 29 0a 4e 6f 4c 6f 67 54 69 <6d> 65 73 74 61 6d 70 0a 4e 6f 73 74 64 6f 6f 75 74 0a 66 69 6c 65 [ 960.042440][ T1137] RSP: 002b:00007f8a296d6da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 960.051376][ T1137] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446759 [ 960.059877][ T1137] RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 [ 960.068264][ T1137] RBP: 00000000006dbc20 R08: 0000000000000480 R09: 0000000000000000 [ 960.076248][ T1137] R10: 0000000020000080 R11: 0000000000000246 R12: 00000000006dbc2c [ 960.085734][ T1137] R13: 0000000020000080 R14: 00000000004ae608 R15: 000000000000002d [ 960.094250][ T1137] INFO: task syz-executor180:9988 blocked for more than 144 seconds. [ 960.102694][ T1137] Not tainted 5.5.0-syzkaller #0 [ 960.108539][ T1137] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 960.117240][ T1137] syz-executor180 D27792 9988 9962 0x00004004 [ 960.124325][ T1137] Call Trace: [ 960.128699][ T1137] __schedule+0x934/0x1f90 [ 960.133153][ T1137] ? __sched_text_start+0x8/0x8 [ 960.138422][ T1137] ? lock_downgrade+0x920/0x920 [ 960.143297][ T1137] ? rwlock_bug.part.0+0x90/0x90 [ 960.148640][ T1137] schedule+0xdc/0x2b0 [ 960.152736][ T1137] schedule_preempt_disabled+0x13/0x20 [ 960.158643][ T1137] __mutex_lock+0x7ab/0x13c0 [ 960.163259][ T1137] ? hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 960.170173][ T1137] ? mutex_trylock+0x2d0/0x2d0 [ 960.174952][ T1137] ? mark_held_locks+0xf0/0xf0 [ 960.180179][ T1137] ? mark_held_locks+0xf0/0xf0 [ 960.184961][ T1137] ? pcpu_next_md_free_region+0x176/0x350 [ 960.191207][ T1137] mutex_lock_nested+0x16/0x20 [ 960.195982][ T1137] ? mutex_lock_nested+0x16/0x20 [ 960.201398][ T1137] hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 960.209035][ T1137] hashlimit_mt_check_v2+0x327/0x3b0 [ 960.214355][ T1137] ? hashlimit_mt_check+0xd0/0xd0 [ 960.219835][ T1137] ? lock_downgrade+0x920/0x920 [ 960.224702][ T1137] ? xt_find_match+0xa6/0x280 [ 960.229895][ T1137] ? mutex_trylock+0x2d0/0x2d0 [ 960.234693][ T1137] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 960.241325][ T1137] ? hashlimit_mt_check+0xd0/0xd0 [ 960.246377][ T1137] xt_check_match+0x280/0x690 [ 960.251470][ T1137] ? xt_check_target+0x690/0x690 [ 960.256431][ T1137] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 960.263316][ T1137] ? mutex_unlock+0xd/0x10 [ 960.268123][ T1137] ? xt_find_match+0x73/0x280 [ 960.272932][ T1137] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 960.279632][ T1137] find_check_entry.isra.0+0x389/0x9d0 [ 960.285135][ T1137] ? __do_replace+0x950/0x950 [ 960.290279][ T1137] ? lockdep_hardirqs_on+0x421/0x5e0 [ 960.295620][ T1137] ? trace_hardirqs_on+0x67/0x240 [ 960.301129][ T1137] ? kvfree+0x4a/0x60 [ 960.305165][ T1137] translate_table+0xd15/0x1860 [ 960.310459][ T1137] ? compat_do_ip6t_get_ctl+0x9a0/0x9a0 [ 960.316038][ T1137] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 960.322768][ T1137] ? _copy_from_user+0x12c/0x1a0 [ 960.328138][ T1137] do_ip6t_set_ctl+0x2fe/0x4c8 [ 960.332934][ T1137] ? compat_do_ip6t_set_ctl+0x170/0x170 [ 960.339896][ T1137] ? mutex_unlock+0xd/0x10 [ 960.344469][ T1137] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 960.350877][ T1137] nf_setsockopt+0x77/0xd0 [ 960.355467][ T1137] ipv6_setsockopt+0x147/0x180 [ 960.360939][ T1137] rawv6_setsockopt+0x5e/0x150 [ 960.365741][ T1137] sock_common_setsockopt+0x94/0xd0 [ 960.371425][ T1137] __sys_setsockopt+0x261/0x4c0 [ 960.376403][ T1137] ? sock_create_kern+0x50/0x50 [ 960.383309][ T1137] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 960.389350][ T1137] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 960.394816][ T1137] ? do_syscall_64+0x26/0x790 [ 960.400012][ T1137] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 960.406095][ T1137] ? do_syscall_64+0x26/0x790 [ 960.411177][ T1137] __x64_sys_setsockopt+0xbe/0x150 [ 960.416309][ T1137] do_syscall_64+0xfa/0x790 [ 960.421378][ T1137] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 960.427294][ T1137] RIP: 0033:0x446759 [ 960.431939][ T1137] Code: 75 67 49 6e 66 6f 4f 6e 45 78 69 74 20 28 6e 6f 74 20 79 65 74 20 69 6d 70 6c 65 6d 65 6e 74 65 64 29 0a 4e 6f 4c 6f 67 54 69 <6d> 65 73 74 61 6d 70 0a 4e 6f 73 74 64 6f 6f 75 74 0a 66 69 6c 65 [ 960.452050][ T1137] RSP: 002b:00007f8a296d6da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 960.460890][ T1137] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446759 [ 960.470466][ T1137] RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 [ 960.478803][ T1137] RBP: 00000000006dbc20 R08: 0000000000000480 R09: 0000000000000000 [ 960.486791][ T1137] R10: 0000000020000080 R11: 0000000000000246 R12: 00000000006dbc2c [ 960.495318][ T1137] R13: 0000000020000080 R14: 00000000004ae608 R15: 000000000000002d [ 960.503737][ T1137] [ 960.503737][ T1137] Showing all locks held in the system: [ 960.511928][ T1137] 1 lock held by khungtaskd/1137: [ 960.516965][ T1137] #0: ffffffff89bac200 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x279 [ 960.526724][ T1137] 1 lock held by rsyslogd/9839: [ 960.531954][ T1137] #0: ffff8880a10e5120 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 960.540992][ T1137] 2 locks held by getty/9929: [ 960.545668][ T1137] #0: ffff888091041090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 960.555175][ T1137] #1: ffffc900061832e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 960.566235][ T1137] 2 locks held by getty/9930: [ 960.571244][ T1137] #0: ffff888098bc5090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 960.580639][ T1137] #1: ffffc900061b32e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 960.590749][ T1137] 2 locks held by getty/9931: [ 960.595445][ T1137] #0: ffff888091e2b090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 960.605930][ T1137] #1: ffffc900061932e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 960.615958][ T1137] 2 locks held by getty/9932: [ 960.621038][ T1137] #0: ffff888098226090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 960.630514][ T1137] #1: ffffc900061b72e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 960.640460][ T1137] 2 locks held by getty/9933: [ 960.645153][ T1137] #0: ffff88809006f090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 960.654558][ T1137] #1: ffffc900061bb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 960.665001][ T1137] 2 locks held by getty/9934: [ 960.670057][ T1137] #0: ffff8880a3fa6090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 960.679371][ T1137] #1: ffffc900061bf2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 960.689358][ T1137] 2 locks held by getty/9935: [ 960.694044][ T1137] #0: ffff8880a6bdf090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 960.703446][ T1137] #1: ffffc900061532e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 960.713699][ T1137] 2 locks held by syz-executor180/9975: [ 960.719693][ T1137] 1 lock held by syz-executor180/9984: [ 960.725157][ T1137] #0: ffffffff8a7d0e20 (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 960.737308][ T1137] 1 lock held by syz-executor180/9982: [ 960.743096][ T1137] #0: ffffffff8a7d0e20 (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 960.754170][ T1137] 1 lock held by syz-executor180/9983: [ 960.760068][ T1137] #0: ffffffff8a7d0e20 (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 960.771217][ T1137] 1 lock held by syz-executor180/9987: [ 960.776667][ T1137] #0: ffffffff8a7d0e20 (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 960.787878][ T1137] 1 lock held by syz-executor180/9988: [ 960.793342][ T1137] #0: ffffffff8a7d0e20 (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 960.804526][ T1137] [ 960.806860][ T1137] ============================================= [ 960.806860][ T1137] [ 960.815629][ T1137] NMI backtrace for cpu 1 [ 960.820014][ T1137] CPU: 1 PID: 1137 Comm: khungtaskd Not tainted 5.5.0-syzkaller #0 [ 960.827902][ T1137] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 960.838209][ T1137] Call Trace: [ 960.841564][ T1137] dump_stack+0x197/0x210 [ 960.845994][ T1137] nmi_cpu_backtrace.cold+0x70/0xb2 [ 960.851268][ T1137] ? vprintk_func+0x86/0x189 [ 960.856057][ T1137] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 960.861714][ T1137] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 960.867730][ T1137] arch_trigger_cpumask_backtrace+0x14/0x20 [ 960.873648][ T1137] watchdog+0xb11/0x10c0 [ 960.878063][ T1137] kthread+0x361/0x430 [ 960.882151][ T1137] ? reset_hung_task_detector+0x30/0x30 [ 960.887829][ T1137] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 960.893560][ T1137] ret_from_fork+0x24/0x30 [ 960.898153][ T1137] Sending NMI from CPU 1 to CPUs 0: [ 960.903969][ C0] NMI backtrace for cpu 0 [ 960.903975][ C0] CPU: 0 PID: 9975 Comm: syz-executor180 Not tainted 5.5.0-syzkaller #0 [ 960.903982][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 960.903986][ C0] RIP: 0010:lock_release+0x4d9/0x960 [ 960.903999][ C0] Code: 08 00 0f 84 7f 01 00 00 48 8b bd 48 ff ff ff 57 9d 0f 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 43 08 00 00 00 00 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 [ 960.904003][ C0] RSP: 0018:ffffc9000634f6b8 EFLAGS: 00000282 [ 960.904010][ C0] RAX: dffffc0000000000 RBX: fffff52000c69edc RCX: 1ffff11014d449d1 [ 960.904016][ C0] RDX: dffffc0000000000 RSI: 1ffff11014d449d8 RDI: 0000000000000282 [ 960.904021][ C0] RBP: ffffc9000634f788 R08: 0000000000000002 R09: ffff8880a6a24e90 [ 960.904027][ C0] R10: fffffbfff154b110 R11: ffffffff8aa58887 R12: ffff8880a6a24600 [ 960.904032][ C0] R13: ffffffff868a2362 R14: ffffc9000634f760 R15: ffff8880a6a24600 [ 960.904038][ C0] FS: 00007f8a296d7700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 960.904042][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 960.904048][ C0] CR2: 00000000006db0c0 CR3: 00000000a0611000 CR4: 00000000001406f0 [ 960.904053][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 960.904058][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 960.904061][ C0] Call Trace: [ 960.904064][ C0] ? lock_downgrade+0x920/0x920 [ 960.904068][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 960.904071][ C0] _raw_spin_unlock_bh+0x16/0x30 [ 960.904075][ C0] htable_selective_cleanup+0x232/0x340 [ 960.904078][ C0] htable_put+0x174/0x220 [ 960.904082][ C0] ? hashlimit_mt_destroy+0x70/0x70 [ 960.904085][ C0] hashlimit_mt_destroy_v2+0x56/0x70 [ 960.904089][ C0] cleanup_match+0xde/0x170 [ 960.904092][ C0] ? icmp6_checkentry+0xa0/0xa0 [ 960.904096][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 960.904100][ C0] find_check_entry.isra.0+0x4da/0x9d0 [ 960.904103][ C0] ? __do_replace+0x950/0x950 [ 960.904107][ C0] ? lockdep_hardirqs_on+0x421/0x5e0 [ 960.904110][ C0] ? trace_hardirqs_on+0x67/0x240 [ 960.904113][ C0] ? kvfree+0x4a/0x60 [ 960.904117][ C0] translate_table+0xd15/0x1860 [ 960.904121][ C0] ? compat_do_ip6t_get_ctl+0x9a0/0x9a0 [ 960.904125][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 960.904129][ C0] ? _copy_from_user+0x12c/0x1a0 [ 960.904132][ C0] do_ip6t_set_ctl+0x2fe/0x4c8 [ 960.904136][ C0] ? compat_do_ip6t_set_ctl+0x170/0x170 [ 960.904140][ C0] ? mutex_unlock+0xd/0x10 [ 960.904144][ C0] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 960.904147][ C0] nf_setsockopt+0x77/0xd0 [ 960.904150][ C0] ipv6_setsockopt+0x147/0x180 [ 960.904154][ C0] rawv6_setsockopt+0x5e/0x150 [ 960.904158][ C0] sock_common_setsockopt+0x94/0xd0 [ 960.904161][ C0] __sys_setsockopt+0x261/0x4c0 [ 960.904165][ C0] ? sock_create_kern+0x50/0x50 [ 960.904169][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 960.904173][ C0] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 960.904177][ C0] ? do_syscall_64+0x26/0x790 [ 960.904181][ C0] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 960.904184][ C0] ? do_syscall_64+0x26/0x790 [ 960.904188][ C0] __x64_sys_setsockopt+0xbe/0x150 [ 960.904191][ C0] do_syscall_64+0xfa/0x790 [ 960.904195][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 960.904198][ C0] RIP: 0033:0x446759 [ 960.904210][ C0] Code: e8 0c 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 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 960.904214][ C0] RSP: 002b:00007f8a296d6da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 960.904223][ C0] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446759 [ 960.904229][ C0] RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 [ 960.904234][ C0] RBP: 00000000006dbc20 R08: 0000000000000480 R09: 0000000000000000 [ 960.904239][ C0] R10: 0000000020000080 R11: 0000000000000246 R12: 00000000006dbc2c [ 960.904245][ C0] R13: 0000000020000080 R14: 00000000004ae608 R15: 000000000000002d [ 960.913533][ T1137] Kernel panic - not syncing: hung_task: blocked tasks [ 961.308535][ T1137] CPU: 1 PID: 1137 Comm: khungtaskd Not tainted 5.5.0-syzkaller #0 [ 961.316428][ T1137] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 961.326580][ T1137] Call Trace: [ 961.329893][ T1137] dump_stack+0x197/0x210 [ 961.334308][ T1137] panic+0x2e3/0x75c [ 961.338217][ T1137] ? add_taint.cold+0x16/0x16 [ 961.343436][ T1137] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 961.349091][ T1137] ? ___preempt_schedule+0x16/0x18 [ 961.354224][ T1137] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 961.360394][ T1137] ? nmi_trigger_cpumask_backtrace+0x24c/0x28b [ 961.366553][ T1137] ? nmi_trigger_cpumask_backtrace+0x256/0x28b [ 961.372714][ T1137] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 961.379140][ T1137] watchdog+0xb22/0x10c0 [ 961.383404][ T1137] kthread+0x361/0x430 [ 961.387476][ T1137] ? reset_hung_task_detector+0x30/0x30 [ 961.393246][ T1137] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 961.398982][ T1137] ret_from_fork+0x24/0x30 [ 961.405282][ T1137] Kernel Offset: disabled [ 961.409620][ T1137] Rebooting in 86400 seconds..