[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 72.828990][ T27] audit: type=1800 audit(1581628701.163:25): pid=9315 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 72.848851][ T27] audit: type=1800 audit(1581628701.163:26): pid=9315 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 72.869510][ T27] audit: type=1800 audit(1581628701.163:27): pid=9315 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.217' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 949.131516][ T1086] INFO: task syz-executor630:9476 blocked for more than 143 seconds. [ 949.139786][ T1086] Not tainted 5.6.0-rc1-syzkaller #0 [ 949.148151][ T1086] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 949.157126][ T1086] syz-executor630 D27792 9476 9475 0x00004004 [ 949.169247][ T1086] Call Trace: [ 949.172933][ T1086] __schedule+0x934/0x1f90 [ 949.177380][ T1086] ? __sched_text_start+0x8/0x8 [ 949.182609][ T1086] ? lock_downgrade+0x920/0x920 [ 949.187465][ T1086] ? rwlock_bug.part.0+0x90/0x90 [ 949.192746][ T1086] schedule+0xdc/0x2b0 [ 949.196839][ T1086] schedule_preempt_disabled+0x13/0x20 [ 949.202658][ T1086] __mutex_lock+0x7ab/0x13c0 [ 949.207321][ T1086] ? hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 949.214160][ T1086] ? mutex_trylock+0x2d0/0x2d0 [ 949.218934][ T1086] ? mark_held_locks+0xf0/0xf0 [ 949.224013][ T1086] ? mark_held_locks+0xf0/0xf0 [ 949.228835][ T1086] ? pcpu_next_md_free_region+0x176/0x350 [ 949.234916][ T1086] mutex_lock_nested+0x16/0x20 [ 949.239685][ T1086] ? mutex_lock_nested+0x16/0x20 [ 949.244933][ T1086] hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 949.251297][ T1086] hashlimit_mt_check_v1+0x325/0x3ab [ 949.256975][ T1086] ? hashlimit_mt_check_v2+0x3b0/0x3b0 [ 949.262954][ T1086] ? lock_downgrade+0x920/0x920 [ 949.267913][ T1086] ? xt_find_match+0xa6/0x280 [ 949.273983][ T1086] ? mutex_trylock+0x2d0/0x2d0 [ 949.278846][ T1086] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 949.285585][ T1086] ? hashlimit_mt_check_v2+0x3b0/0x3b0 [ 949.291073][ T1086] xt_check_match+0x280/0x690 [ 949.296134][ T1086] ? xt_check_target+0x690/0x690 [ 949.301167][ T1086] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 949.307810][ T1086] ? mutex_unlock+0xd/0x10 [ 949.312535][ T1086] ? xt_find_match+0x73/0x280 [ 949.317243][ T1086] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 949.324068][ T1086] find_check_entry.isra.0+0x32f/0x920 [ 949.329561][ T1086] ? ipt_do_table+0x1b80/0x1b80 [ 949.334823][ T1086] ? lockdep_hardirqs_on+0x421/0x5e0 [ 949.340211][ T1086] ? trace_hardirqs_on+0x67/0x240 [ 949.345722][ T1086] ? kvfree+0x4a/0x60 [ 949.349752][ T1086] translate_table+0xcb4/0x17d0 [ 949.355220][ T1086] ? compat_do_ipt_get_ctl+0x910/0x910 [ 949.360694][ T1086] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 949.367364][ T1086] ? _copy_from_user+0x12c/0x1a0 [ 949.372633][ T1086] do_ipt_set_ctl+0x2fe/0x4c2 [ 949.377327][ T1086] ? compat_do_ipt_set_ctl+0x170/0x170 [ 949.383133][ T1086] ? mutex_unlock+0xd/0x10 [ 949.387614][ T1086] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 949.393947][ T1086] nf_setsockopt+0x77/0xd0 [ 949.398408][ T1086] ip_setsockopt+0xdf/0x100 [ 949.404153][ T1086] tcp_setsockopt+0x8f/0xe0 [ 949.408745][ T1086] sock_common_setsockopt+0x94/0xd0 [ 949.414264][ T1086] __sys_setsockopt+0x261/0x4c0 [ 949.419123][ T1086] ? sock_create_kern+0x50/0x50 [ 949.424282][ T1086] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 949.429914][ T1086] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 949.435804][ T1086] ? do_syscall_64+0x26/0x790 [ 949.440505][ T1086] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 949.446903][ T1086] ? do_syscall_64+0x26/0x790 [ 949.451922][ T1086] __x64_sys_setsockopt+0xbe/0x150 [ 949.457050][ T1086] do_syscall_64+0xfa/0x790 [ 949.461858][ T1086] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 949.467753][ T1086] RIP: 0033:0x441c39 [ 949.471939][ T1086] Code: 73 75 70 70 6f 72 74 65 64 20 69 6e 20 63 6f 6d 70 61 74 69 62 69 6c 69 74 79 20 6d 6f 64 65 73 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 [ 949.491861][ T1086] RSP: 002b:00007ffc1be2fba8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 949.500274][ T1086] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441c39 [ 949.508595][ T1086] RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 [ 949.516934][ T1086] RBP: 00000000006cc018 R08: 0000000000000318 R09: 00000000004002c8 [ 949.525181][ T1086] R10: 0000000020000540 R11: 0000000000000246 R12: 00000000004029b0 [ 949.534721][ T1086] R13: 0000000000402a40 R14: 0000000000000000 R15: 0000000000000000 [ 949.543098][ T1086] INFO: task syz-executor630:9477 blocked for more than 143 seconds. [ 949.551169][ T1086] Not tainted 5.6.0-rc1-syzkaller #0 [ 949.557242][ T1086] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 949.566336][ T1086] syz-executor630 D28072 9477 9474 0x00000004 [ 949.572939][ T1086] Call Trace: [ 949.576241][ T1086] __schedule+0x934/0x1f90 [ 949.580686][ T1086] ? __sched_text_start+0x8/0x8 [ 949.586036][ T1086] ? lock_downgrade+0x920/0x920 [ 949.590908][ T1086] ? rwlock_bug.part.0+0x90/0x90 [ 949.596287][ T1086] schedule+0xdc/0x2b0 [ 949.600374][ T1086] schedule_preempt_disabled+0x13/0x20 [ 949.606146][ T1086] __mutex_lock+0x7ab/0x13c0 [ 949.610746][ T1086] ? hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 949.617598][ T1086] ? mutex_trylock+0x2d0/0x2d0 [ 949.622658][ T1086] ? mark_held_locks+0xf0/0xf0 [ 949.627439][ T1086] ? mark_held_locks+0xf0/0xf0 [ 949.632588][ T1086] ? pcpu_next_md_free_region+0x176/0x350 [ 949.638327][ T1086] mutex_lock_nested+0x16/0x20 [ 949.643413][ T1086] ? mutex_lock_nested+0x16/0x20 [ 949.648360][ T1086] hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 949.655007][ T1086] hashlimit_mt_check_v1+0x325/0x3ab [ 949.660308][ T1086] ? hashlimit_mt_check_v2+0x3b0/0x3b0 [ 949.667017][ T1086] ? lock_downgrade+0x920/0x920 [ 949.672140][ T1086] ? xt_find_match+0xa6/0x280 [ 949.676834][ T1086] ? mutex_trylock+0x2d0/0x2d0 [ 949.681903][ T1086] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 949.688060][ T1086] ? hashlimit_mt_check_v2+0x3b0/0x3b0 [ 949.693816][ T1086] xt_check_match+0x280/0x690 [ 949.698505][ T1086] ? xt_check_target+0x690/0x690 [ 949.703753][ T1086] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 949.710013][ T1086] ? mutex_unlock+0xd/0x10 [ 949.714720][ T1086] ? xt_find_match+0x73/0x280 [ 949.719413][ T1086] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 949.726352][ T1086] find_check_entry.isra.0+0x32f/0x920 [ 949.732145][ T1086] ? ipt_do_table+0x1b80/0x1b80 [ 949.737013][ T1086] ? lockdep_hardirqs_on+0x421/0x5e0 [ 949.742624][ T1086] ? trace_hardirqs_on+0x67/0x240 [ 949.747656][ T1086] ? kvfree+0x4a/0x60 [ 949.751946][ T1086] translate_table+0xcb4/0x17d0 [ 949.756841][ T1086] ? compat_do_ipt_get_ctl+0x910/0x910 [ 949.762677][ T1086] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 949.768941][ T1086] ? _copy_from_user+0x12c/0x1a0 [ 949.774348][ T1086] do_ipt_set_ctl+0x2fe/0x4c2 [ 949.779035][ T1086] ? compat_do_ipt_set_ctl+0x170/0x170 [ 949.784899][ T1086] ? mutex_unlock+0xd/0x10 [ 949.789324][ T1086] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 949.796515][ T1086] nf_setsockopt+0x77/0xd0 [ 949.800948][ T1086] ip_setsockopt+0xdf/0x100 [ 949.805770][ T1086] tcp_setsockopt+0x8f/0xe0 [ 949.810290][ T1086] sock_common_setsockopt+0x94/0xd0 [ 949.815780][ T1086] __sys_setsockopt+0x261/0x4c0 [ 949.820641][ T1086] ? sock_create_kern+0x50/0x50 [ 949.825787][ T1086] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 949.831629][ T1086] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 949.837110][ T1086] ? do_syscall_64+0x26/0x790 [ 949.842171][ T1086] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 949.848244][ T1086] ? do_syscall_64+0x26/0x790 [ 949.853237][ T1086] __x64_sys_setsockopt+0xbe/0x150 [ 949.858364][ T1086] do_syscall_64+0xfa/0x790 [ 949.863179][ T1086] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 949.869070][ T1086] RIP: 0033:0x441c39 [ 949.873344][ T1086] Code: 73 75 70 70 6f 72 74 65 64 20 69 6e 20 63 6f 6d 70 61 74 69 62 69 6c 69 74 79 20 6d 6f 64 65 73 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 [ 949.893336][ T1086] RSP: 002b:00007ffc1be2fba8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 949.902106][ T1086] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441c39 [ 949.910083][ T1086] RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 [ 949.918433][ T1086] RBP: 00000000006cc018 R08: 0000000000000318 R09: 00000000004002c8 [ 949.927659][ T1086] R10: 0000000020000540 R11: 0000000000000246 R12: 00000000004029b0 [ 949.935961][ T1086] R13: 0000000000402a40 R14: 0000000000000000 R15: 0000000000000000 [ 949.944266][ T1086] INFO: task syz-executor630:9478 blocked for more than 144 seconds. [ 949.952591][ T1086] Not tainted 5.6.0-rc1-syzkaller #0 [ 949.958401][ T1086] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 949.967422][ T1086] syz-executor630 D28072 9478 9472 0x00000004 [ 949.974065][ T1086] Call Trace: [ 949.977378][ T1086] __schedule+0x934/0x1f90 [ 949.982301][ T1086] ? __sched_text_start+0x8/0x8 [ 949.987239][ T1086] ? lock_downgrade+0x920/0x920 [ 949.992520][ T1086] ? rwlock_bug.part.0+0x90/0x90 [ 949.997500][ T1086] schedule+0xdc/0x2b0 [ 950.001878][ T1086] schedule_preempt_disabled+0x13/0x20 [ 950.007355][ T1086] __mutex_lock+0x7ab/0x13c0 [ 950.012355][ T1086] ? hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 950.018878][ T1086] ? mutex_trylock+0x2d0/0x2d0 [ 950.024036][ T1086] ? mark_held_locks+0xf0/0xf0 [ 950.028907][ T1086] ? mark_held_locks+0xf0/0xf0 [ 950.034014][ T1086] ? pcpu_next_md_free_region+0x176/0x350 [ 950.039764][ T1086] mutex_lock_nested+0x16/0x20 [ 950.044976][ T1086] ? mutex_lock_nested+0x16/0x20 [ 950.049924][ T1086] hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 950.057540][ T1086] hashlimit_mt_check_v1+0x325/0x3ab [ 950.063113][ T1086] ? hashlimit_mt_check_v2+0x3b0/0x3b0 [ 950.068574][ T1086] ? lock_downgrade+0x920/0x920 [ 950.073730][ T1086] ? xt_find_match+0xa6/0x280 [ 950.078424][ T1086] ? mutex_trylock+0x2d0/0x2d0 [ 950.083498][ T1086] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 950.089656][ T1086] ? hashlimit_mt_check_v2+0x3b0/0x3b0 [ 950.095456][ T1086] xt_check_match+0x280/0x690 [ 950.100146][ T1086] ? xt_check_target+0x690/0x690 [ 950.105405][ T1086] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 950.111959][ T1086] ? mutex_unlock+0xd/0x10 [ 950.116379][ T1086] ? xt_find_match+0x73/0x280 [ 950.121080][ T1086] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 950.127814][ T1086] find_check_entry.isra.0+0x32f/0x920 [ 950.133603][ T1086] ? ipt_do_table+0x1b80/0x1b80 [ 950.138473][ T1086] ? lockdep_hardirqs_on+0x421/0x5e0 [ 950.144097][ T1086] ? trace_hardirqs_on+0x67/0x240 [ 950.149149][ T1086] ? kvfree+0x4a/0x60 [ 950.153527][ T1086] translate_table+0xcb4/0x17d0 [ 950.158422][ T1086] ? compat_do_ipt_get_ctl+0x910/0x910 [ 950.164199][ T1086] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 950.170445][ T1086] ? _copy_from_user+0x12c/0x1a0 [ 950.175771][ T1086] do_ipt_set_ctl+0x2fe/0x4c2 [ 950.180466][ T1086] ? compat_do_ipt_set_ctl+0x170/0x170 [ 950.187236][ T1086] ? mutex_unlock+0xd/0x10 [ 950.192182][ T1086] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 950.198185][ T1086] nf_setsockopt+0x77/0xd0 [ 950.202998][ T1086] ip_setsockopt+0xdf/0x100 [ 950.207513][ T1086] tcp_setsockopt+0x8f/0xe0 [ 950.212358][ T1086] sock_common_setsockopt+0x94/0xd0 [ 950.217576][ T1086] __sys_setsockopt+0x261/0x4c0 [ 950.222734][ T1086] ? sock_create_kern+0x50/0x50 [ 950.227591][ T1086] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 950.233481][ T1086] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 950.238948][ T1086] ? do_syscall_64+0x26/0x790 [ 950.243939][ T1086] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 950.250027][ T1086] ? do_syscall_64+0x26/0x790 [ 950.255101][ T1086] __x64_sys_setsockopt+0xbe/0x150 [ 950.260230][ T1086] do_syscall_64+0xfa/0x790 [ 950.265125][ T1086] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 950.271016][ T1086] RIP: 0033:0x441c39 [ 950.275224][ T1086] Code: 73 75 70 70 6f 72 74 65 64 20 69 6e 20 63 6f 6d 70 61 74 69 62 69 6c 69 74 79 20 6d 6f 64 65 73 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 [ 950.295226][ T1086] RSP: 002b:00007ffc1be2fba8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 950.303936][ T1086] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441c39 [ 950.313167][ T1086] RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 [ 950.321155][ T1086] RBP: 00000000006cc018 R08: 0000000000000318 R09: 00000000004002c8 [ 950.329438][ T1086] R10: 0000000020000540 R11: 0000000000000246 R12: 00000000004029b0 [ 950.337730][ T1086] R13: 0000000000402a40 R14: 0000000000000000 R15: 0000000000000000 [ 950.346137][ T1086] INFO: task syz-executor630:9479 blocked for more than 144 seconds. [ 950.354683][ T1086] Not tainted 5.6.0-rc1-syzkaller #0 [ 950.360597][ T1086] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 950.369616][ T1086] syz-executor630 D27384 9479 9470 0x00000004 [ 950.376642][ T1086] Call Trace: [ 950.380062][ T1086] __schedule+0x934/0x1f90 [ 950.384869][ T1086] ? __sched_text_start+0x8/0x8 [ 950.389833][ T1086] ? lock_downgrade+0x920/0x920 [ 950.395206][ T1086] ? rwlock_bug.part.0+0x90/0x90 [ 950.400163][ T1086] schedule+0xdc/0x2b0 [ 950.404730][ T1086] schedule_preempt_disabled+0x13/0x20 [ 950.410200][ T1086] __mutex_lock+0x7ab/0x13c0 [ 950.415117][ T1086] ? hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 950.421937][ T1086] ? mutex_trylock+0x2d0/0x2d0 [ 950.426726][ T1086] ? mark_held_locks+0xf0/0xf0 [ 950.431831][ T1086] ? mark_held_locks+0xf0/0xf0 [ 950.436624][ T1086] ? pcpu_next_md_free_region+0x176/0x350 [ 950.443620][ T1086] mutex_lock_nested+0x16/0x20 [ 950.448388][ T1086] ? mutex_lock_nested+0x16/0x20 [ 950.453613][ T1086] hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 950.459959][ T1086] hashlimit_mt_check_v1+0x325/0x3ab [ 950.465552][ T1086] ? hashlimit_mt_check_v2+0x3b0/0x3b0 [ 950.471013][ T1086] ? lock_downgrade+0x920/0x920 [ 950.476152][ T1086] ? xt_find_match+0xa6/0x280 [ 950.480843][ T1086] ? mutex_trylock+0x2d0/0x2d0 [ 950.485914][ T1086] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 950.492361][ T1086] ? hashlimit_mt_check_v2+0x3b0/0x3b0 [ 950.497830][ T1086] xt_check_match+0x280/0x690 [ 950.502808][ T1086] ? xt_check_target+0x690/0x690 [ 950.507767][ T1086] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 950.514386][ T1086] ? mutex_unlock+0xd/0x10 [ 950.518814][ T1086] ? xt_find_match+0x73/0x280 [ 950.523887][ T1086] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 950.530150][ T1086] find_check_entry.isra.0+0x32f/0x920 [ 950.535962][ T1086] ? ipt_do_table+0x1b80/0x1b80 [ 950.540834][ T1086] ? lockdep_hardirqs_on+0x421/0x5e0 [ 950.546529][ T1086] ? trace_hardirqs_on+0x67/0x240 [ 950.551841][ T1086] ? kvfree+0x4a/0x60 [ 950.555842][ T1086] translate_table+0xcb4/0x17d0 [ 950.560723][ T1086] ? compat_do_ipt_get_ctl+0x910/0x910 [ 950.566527][ T1086] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 950.574040][ T1086] ? _copy_from_user+0x12c/0x1a0 [ 950.578993][ T1086] do_ipt_set_ctl+0x2fe/0x4c2 [ 950.583997][ T1086] ? compat_do_ipt_set_ctl+0x170/0x170 [ 950.589485][ T1086] ? mutex_unlock+0xd/0x10 [ 950.594205][ T1086] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 950.600460][ T1086] nf_setsockopt+0x77/0xd0 [ 950.605186][ T1086] ip_setsockopt+0xdf/0x100 [ 950.609698][ T1086] tcp_setsockopt+0x8f/0xe0 [ 950.614672][ T1086] sock_common_setsockopt+0x94/0xd0 [ 950.619885][ T1086] __sys_setsockopt+0x261/0x4c0 [ 950.625053][ T1086] ? sock_create_kern+0x50/0x50 [ 950.629932][ T1086] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 950.635968][ T1086] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 950.641724][ T1086] ? do_syscall_64+0x26/0x790 [ 950.646417][ T1086] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 950.652853][ T1086] ? do_syscall_64+0x26/0x790 [ 950.657544][ T1086] __x64_sys_setsockopt+0xbe/0x150 [ 950.662973][ T1086] do_syscall_64+0xfa/0x790 [ 950.667489][ T1086] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 950.673696][ T1086] RIP: 0033:0x441c39 [ 950.677605][ T1086] Code: 73 75 70 70 6f 72 74 65 64 20 69 6e 20 63 6f 6d 70 61 74 69 62 69 6c 69 74 79 20 6d 6f 64 65 73 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 [ 950.697564][ T1086] RSP: 002b:00007ffc1be2fba8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 950.707202][ T1086] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441c39 [ 950.715474][ T1086] RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 [ 950.723891][ T1086] RBP: 00000000006cc018 R08: 0000000000000318 R09: 00000000004002c8 [ 950.732168][ T1086] R10: 0000000020000540 R11: 0000000000000246 R12: 00000000004029b0 [ 950.740140][ T1086] R13: 0000000000402a40 R14: 0000000000000000 R15: 0000000000000000 [ 950.748519][ T1086] INFO: task syz-executor630:9480 blocked for more than 144 seconds. [ 950.756878][ T1086] Not tainted 5.6.0-rc1-syzkaller #0 [ 950.762911][ T1086] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 950.771862][ T1086] syz-executor630 D27792 9480 9473 0x00004004 [ 950.778211][ T1086] Call Trace: [ 950.781910][ T1086] __schedule+0x934/0x1f90 [ 950.786346][ T1086] ? __sched_text_start+0x8/0x8 [ 950.791199][ T1086] ? lock_downgrade+0x920/0x920 [ 950.796485][ T1086] ? rwlock_bug.part.0+0x90/0x90 [ 950.801728][ T1086] schedule+0xdc/0x2b0 [ 950.805813][ T1086] schedule_preempt_disabled+0x13/0x20 [ 950.811269][ T1086] __mutex_lock+0x7ab/0x13c0 [ 950.816211][ T1086] ? hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 950.823171][ T1086] ? mutex_trylock+0x2d0/0x2d0 [ 950.827961][ T1086] ? mark_held_locks+0xf0/0xf0 [ 950.833971][ T1086] ? lockdep_hardirqs_on+0x421/0x5e0 [ 950.839266][ T1086] ? trace_hardirqs_on+0x67/0x240 [ 950.844607][ T1086] mutex_lock_nested+0x16/0x20 [ 950.849371][ T1086] ? mutex_lock_nested+0x16/0x20 [ 950.854626][ T1086] hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 950.860976][ T1086] hashlimit_mt_check_v1+0x325/0x3ab [ 950.866559][ T1086] ? hashlimit_mt_check_v2+0x3b0/0x3b0 [ 950.872301][ T1086] ? lock_downgrade+0x920/0x920 [ 950.877166][ T1086] ? xt_find_match+0xa6/0x280 [ 950.882241][ T1086] ? mutex_trylock+0x2d0/0x2d0 [ 950.887017][ T1086] ? hashlimit_mt_check_v2+0x3b0/0x3b0 [ 950.892887][ T1086] xt_check_match+0x280/0x690 [ 950.897579][ T1086] ? xt_check_target+0x690/0x690 [ 950.902829][ T1086] ? pcpu_alloc+0x5ef/0x11e0 [ 950.907442][ T1086] ? mutex_unlock+0xd/0x10 [ 950.912286][ T1086] ? xt_find_match+0x73/0x280 [ 950.916987][ T1086] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 950.923561][ T1086] find_check_entry.isra.0+0x32f/0x920 [ 950.929041][ T1086] ? ipt_do_table+0x1b80/0x1b80 [ 950.934259][ T1086] ? lockdep_hardirqs_on+0x421/0x5e0 [ 950.939552][ T1086] ? trace_hardirqs_on+0x67/0x240 [ 950.944899][ T1086] ? kvfree+0x4a/0x60 [ 950.948919][ T1086] translate_table+0xcb4/0x17d0 [ 950.954193][ T1086] ? compat_do_ipt_get_ctl+0x910/0x910 [ 950.959700][ T1086] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 950.967268][ T1086] ? _copy_from_user+0x12c/0x1a0 [ 950.972518][ T1086] do_ipt_set_ctl+0x2fe/0x4c2 [ 950.977212][ T1086] ? compat_do_ipt_set_ctl+0x170/0x170 [ 950.983030][ T1086] ? mutex_unlock+0xd/0x10 [ 950.987456][ T1086] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 950.993754][ T1086] nf_setsockopt+0x77/0xd0 [ 950.998186][ T1086] ip_setsockopt+0xdf/0x100 [ 951.002988][ T1086] tcp_setsockopt+0x8f/0xe0 [ 951.007506][ T1086] sock_common_setsockopt+0x94/0xd0 [ 951.013008][ T1086] __sys_setsockopt+0x261/0x4c0 [ 951.017994][ T1086] ? sock_create_kern+0x50/0x50 [ 951.023264][ T1086] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 951.028836][ T1086] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 951.034781][ T1086] ? do_syscall_64+0x26/0x790 [ 951.039462][ T1086] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 951.045963][ T1086] ? do_syscall_64+0x26/0x790 [ 951.050660][ T1086] __x64_sys_setsockopt+0xbe/0x150 [ 951.056082][ T1086] do_syscall_64+0xfa/0x790 [ 951.060595][ T1086] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 951.066771][ T1086] RIP: 0033:0x441c39 [ 951.070670][ T1086] Code: 73 75 70 70 6f 72 74 65 64 20 69 6e 20 63 6f 6d 70 61 74 69 62 69 6c 69 74 79 20 6d 6f 64 65 73 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 [ 951.090586][ T1086] RSP: 002b:00007ffc1be2fba8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 951.100261][ T1086] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441c39 [ 951.108514][ T1086] RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 [ 951.116769][ T1086] RBP: 00000000006cc018 R08: 0000000000000318 R09: 00000000004002c8 [ 951.125011][ T1086] R10: 0000000020000540 R11: 0000000000000246 R12: 00000000004029b0 [ 951.133351][ T1086] R13: 0000000000402a40 R14: 0000000000000000 R15: 0000000000000000 [ 951.141677][ T1086] [ 951.141677][ T1086] Showing all locks held in the system: [ 951.149395][ T1086] 1 lock held by khungtaskd/1086: [ 951.154713][ T1086] #0: ffffffff89bac240 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x279 [ 951.164332][ T1086] 1 lock held by rsyslogd/9353: [ 951.169178][ T1086] #0: ffff88809b1c56a0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 951.178240][ T1086] 2 locks held by getty/9443: [ 951.183216][ T1086] #0: ffff88808d4ef090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 951.192467][ T1086] #1: ffffc900064332e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 951.202391][ T1086] 2 locks held by getty/9444: [ 951.207061][ T1086] #0: ffff888092ec5090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 951.216400][ T1086] #1: ffffc900064732e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 951.227179][ T1086] 2 locks held by getty/9445: [ 951.232240][ T1086] #0: ffff88809bfbe090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 951.241187][ T1086] #1: ffffc900064b32e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 951.251446][ T1086] 2 locks held by getty/9446: [ 951.256119][ T1086] #0: ffff88809ed36090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 951.265387][ T1086] #1: ffffc900064832e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 951.275256][ T1086] 2 locks held by getty/9447: [ 951.279923][ T1086] #0: ffff8880a310f090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 951.289272][ T1086] #1: ffffc900064232e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 951.299149][ T1086] 2 locks held by getty/9448: [ 951.304080][ T1086] #0: ffff8880a0284090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 951.313392][ T1086] #1: ffffc900064a32e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 951.323253][ T1086] 2 locks held by getty/9449: [ 951.328707][ T1086] #0: ffff8880a3210090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 951.337985][ T1086] #1: ffffc900063f32e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 951.347844][ T1086] 2 locks held by syz-executor630/9471: [ 951.354729][ T1086] 1 lock held by syz-executor630/9476: [ 951.360181][ T1086] #0: ffffffff8a7d2620 (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 951.371211][ T1086] 1 lock held by syz-executor630/9477: [ 951.376952][ T1086] #0: ffffffff8a7d2620 (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 951.387961][ T1086] 1 lock held by syz-executor630/9478: [ 951.393925][ T1086] #0: ffffffff8a7d2620 (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 951.404923][ T1086] 1 lock held by syz-executor630/9479: [ 951.410460][ T1086] #0: ffffffff8a7d2620 (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 951.421511][ T1086] 1 lock held by syz-executor630/9480: [ 951.426962][ T1086] #0: ffffffff8a7d2620 (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 951.438163][ T1086] [ 951.440486][ T1086] ============================================= [ 951.440486][ T1086] [ 951.449291][ T1086] NMI backtrace for cpu 0 [ 951.453693][ T1086] CPU: 0 PID: 1086 Comm: khungtaskd Not tainted 5.6.0-rc1-syzkaller #0 [ 951.461921][ T1086] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 951.471968][ T1086] Call Trace: [ 951.475343][ T1086] dump_stack+0x197/0x210 [ 951.479685][ T1086] nmi_cpu_backtrace.cold+0x70/0xb2 [ 951.484916][ T1086] ? vprintk_func+0x86/0x189 [ 951.489552][ T1086] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 951.495188][ T1086] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 951.501197][ T1086] arch_trigger_cpumask_backtrace+0x14/0x20 [ 951.507100][ T1086] watchdog+0xb11/0x10c0 [ 951.511427][ T1086] kthread+0x361/0x430 [ 951.515504][ T1086] ? reset_hung_task_detector+0x30/0x30 [ 951.521048][ T1086] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 951.526771][ T1086] ret_from_fork+0x24/0x30 [ 951.531363][ T1086] Sending NMI from CPU 0 to CPUs 1: [ 951.537216][ C1] NMI backtrace for cpu 1 [ 951.537223][ C1] CPU: 1 PID: 9471 Comm: syz-executor630 Not tainted 5.6.0-rc1-syzkaller #0 [ 951.537230][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 951.537234][ C1] RIP: 0010:trace_softirqs_off+0xd9/0x360 [ 951.537247][ C1] Code: 89 c1 83 e0 07 48 c1 e9 03 83 c0 03 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 2d 02 00 00 8b 3d 7f 0e 2d 0a 85 ff 0f 84 fb 00 00 00 <48> 8d bb 80 08 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 [ 951.537252][ C1] RSP: 0018:ffffc9000673f748 EFLAGS: 00000046 [ 951.537260][ C1] RAX: 0000000000000082 RBX: ffff888097be6300 RCX: 1ffffffff1710e6c [ 951.537266][ C1] RDX: dffffc0000000000 RSI: 0000000000000201 RDI: 0000000000000000 [ 951.537271][ C1] RBP: ffffc9000673f760 R08: 0000000000000000 R09: 0000000000000001 [ 951.537277][ C1] R10: fffffbfff16a3382 R11: ffffffff8b519c17 R12: ffffffff868ac1d1 [ 951.537283][ C1] R13: ffff888097be6300 R14: ffffc9000bd31000 R15: 0000000000000001 [ 951.537289][ C1] FS: 000000000214d880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 951.537293][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 951.537299][ C1] CR2: 00000000006cd080 CR3: 00000000a345e000 CR4: 00000000001406e0 [ 951.537304][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 951.537310][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 951.537313][ C1] Call Trace: [ 951.537317][ C1] ? htable_selective_cleanup+0xa1/0x340 [ 951.537321][ C1] __local_bh_disable_ip+0xf7/0x1b0 [ 951.537324][ C1] _raw_spin_lock_bh+0x17/0x50 [ 951.537328][ C1] htable_selective_cleanup+0xa1/0x340 [ 951.537331][ C1] htable_put+0x174/0x220 [ 951.537335][ C1] ? hashlimit_mt_destroy_v2+0x70/0x70 [ 951.537339][ C1] hashlimit_mt_destroy_v1+0x50/0x70 [ 951.537343][ C1] cleanup_match+0xde/0x170 [ 951.537346][ C1] ? icmp_checkentry+0xa0/0xa0 [ 951.537351][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 951.537355][ C1] find_check_entry.isra.0+0x454/0x920 [ 951.537358][ C1] ? ipt_do_table+0x1b80/0x1b80 [ 951.537362][ C1] ? lockdep_hardirqs_on+0x421/0x5e0 [ 951.537365][ C1] ? kvfree+0x4a/0x60 [ 951.537368][ C1] translate_table+0xcb4/0x17d0 [ 951.537372][ C1] ? compat_do_ipt_get_ctl+0x910/0x910 [ 951.537376][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 951.537380][ C1] ? _copy_from_user+0x12c/0x1a0 [ 951.537384][ C1] do_ipt_set_ctl+0x2fe/0x4c2 [ 951.537387][ C1] ? compat_do_ipt_set_ctl+0x170/0x170 [ 951.537391][ C1] ? mutex_unlock+0xd/0x10 [ 951.537395][ C1] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 951.537398][ C1] nf_setsockopt+0x77/0xd0 [ 951.537402][ C1] ip_setsockopt+0xdf/0x100 [ 951.537405][ C1] tcp_setsockopt+0x8f/0xe0 [ 951.537409][ C1] sock_common_setsockopt+0x94/0xd0 [ 951.537412][ C1] __sys_setsockopt+0x261/0x4c0 [ 951.537416][ C1] ? sock_create_kern+0x50/0x50 [ 951.537420][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 951.537424][ C1] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 951.537427][ C1] ? do_syscall_64+0x26/0x790 [ 951.537432][ C1] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 951.537435][ C1] ? do_syscall_64+0x26/0x790 [ 951.537439][ C1] __x64_sys_setsockopt+0xbe/0x150 [ 951.537442][ C1] do_syscall_64+0xfa/0x790 [ 951.537446][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 951.537449][ C1] RIP: 0033:0x441c39 [ 951.537462][ C1] 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 [ 951.537466][ C1] RSP: 002b:00007ffc1be2fba8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 951.537476][ C1] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441c39 [ 951.537481][ C1] RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 [ 951.537486][ C1] RBP: 00000000006cc018 R08: 0000000000000318 R09: 00000000004002c8 [ 951.537492][ C1] R10: 0000000020000540 R11: 0000000000000246 R12: 00000000004029b0 [ 951.537497][ C1] R13: 0000000000402a40 R14: 0000000000000000 R15: 0000000000000000 [ 951.546898][ T1086] Kernel panic - not syncing: hung_task: blocked tasks [ 951.940139][ T1086] CPU: 0 PID: 1086 Comm: khungtaskd Not tainted 5.6.0-rc1-syzkaller #0 [ 951.948387][ T1086] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 951.958442][ T1086] Call Trace: [ 951.961750][ T1086] dump_stack+0x197/0x210 [ 951.966154][ T1086] panic+0x2e3/0x75c [ 951.970138][ T1086] ? add_taint.cold+0x16/0x16 [ 951.974817][ T1086] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 951.980453][ T1086] ? ___preempt_schedule+0x16/0x18 [ 951.985571][ T1086] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 951.991726][ T1086] ? nmi_trigger_cpumask_backtrace+0x24c/0x28b [ 951.997875][ T1086] ? nmi_trigger_cpumask_backtrace+0x256/0x28b [ 952.004030][ T1086] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 952.010249][ T1086] watchdog+0xb22/0x10c0 [ 952.014524][ T1086] kthread+0x361/0x430 [ 952.018618][ T1086] ? reset_hung_task_detector+0x30/0x30 [ 952.024164][ T1086] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 952.029894][ T1086] ret_from_fork+0x24/0x30 [ 952.035869][ T1086] Kernel Offset: disabled [ 952.040205][ T1086] Rebooting in 86400 seconds..