[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 80.742342][ T27] kauditd_printk_skb: 4 callbacks suppressed [ 80.742355][ T27] audit: type=1800 audit(1579420696.489:29): pid=9893 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 [ 80.769485][ T27] audit: type=1800 audit(1579420696.499:30): pid=9893 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 '10.128.15.204' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 807.756576][T10048] xt_CT: You must specify a L4 protocol and not use inversions on it [ 955.463505][ T1121] INFO: task syz-executor555:10053 blocked for more than 143 seconds. [ 955.481270][ T1121] Not tainted 5.5.0-rc5-syzkaller #0 [ 955.488386][ T1121] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 955.497344][ T1121] syz-executor555 D27640 10053 10049 0x00004004 [ 955.503920][ T1121] Call Trace: [ 955.507366][ T1121] __schedule+0x934/0x1f90 [ 955.511921][ T1121] ? __sched_text_start+0x8/0x8 [ 955.517278][ T1121] ? lock_downgrade+0x920/0x920 [ 955.522224][ T1121] ? rwlock_bug.part.0+0x90/0x90 [ 955.527456][ T1121] schedule+0xdc/0x2b0 [ 955.531638][ T1121] schedule_preempt_disabled+0x13/0x20 [ 955.537378][ T1121] __mutex_lock+0x7ab/0x13c0 [ 955.542057][ T1121] ? hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 955.548861][ T1121] ? mutex_trylock+0x2d0/0x2d0 [ 955.554055][ T1121] ? pcpu_next_md_free_region+0x176/0x350 [ 955.559795][ T1121] ? pcpu_alloc+0x100c/0x1380 [ 955.564776][ T1121] ? mark_held_locks+0xf0/0xf0 [ 955.569553][ T1121] ? __mutex_lock+0x458/0x13c0 [ 955.574578][ T1121] mutex_lock_nested+0x16/0x20 [ 955.579360][ T1121] ? mutex_lock_nested+0x16/0x20 [ 955.585488][ T1121] hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 955.591892][ T1121] hashlimit_mt_check_v1+0x325/0x3ab [ 955.597492][ T1121] ? hashlimit_mt_check_v2+0x3b0/0x3b0 [ 955.603103][ T1121] ? lock_downgrade+0x920/0x920 [ 955.608287][ T1121] ? xt_find_match+0xa6/0x280 [ 955.612993][ T1121] ? mutex_trylock+0x2d0/0x2d0 [ 955.618052][ T1121] ? hashlimit_mt_check_v2+0x3b0/0x3b0 [ 955.623771][ T1121] xt_check_match+0x280/0x690 [ 955.628465][ T1121] ? xt_check_target+0x690/0x690 [ 955.633666][ T1121] ? pcpu_alloc_area+0x820/0x820 [ 955.638620][ T1121] ? mutex_unlock+0xd/0x10 [ 955.643103][ T1121] ? xt_find_match+0x73/0x280 [ 955.648197][ T1121] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 955.654737][ T1121] find_check_entry.isra.0+0x32f/0x920 [ 955.660315][ T1121] ? ipt_do_table+0x1b80/0x1b80 [ 955.665571][ T1121] ? lockdep_hardirqs_on+0x421/0x5e0 [ 955.671110][ T1121] ? trace_hardirqs_on+0x67/0x240 [ 955.676515][ T1121] ? kvfree+0x61/0x70 [ 955.680543][ T1121] translate_table+0xcb4/0x17d0 [ 955.685663][ T1121] ? compat_do_ipt_get_ctl+0x910/0x910 [ 955.691168][ T1121] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 955.698359][ T1121] ? _copy_from_user+0x12c/0x1a0 [ 955.704456][ T1121] do_ipt_set_ctl+0x2fe/0x4c2 [ 955.709160][ T1121] ? compat_do_ipt_set_ctl+0x170/0x170 [ 955.714905][ T1121] ? mutex_unlock+0xd/0x10 [ 955.719442][ T1121] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 955.725725][ T1121] nf_setsockopt+0x77/0xd0 [ 955.730226][ T1121] ip_setsockopt+0xdf/0x100 [ 955.735046][ T1121] tcp_setsockopt+0x8f/0xe0 [ 955.739629][ T1121] sock_common_setsockopt+0x94/0xd0 [ 955.745196][ T1121] __sys_setsockopt+0x261/0x4c0 [ 955.750100][ T1121] ? sock_create_kern+0x50/0x50 [ 955.755464][ T1121] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 955.761044][ T1121] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 955.767718][ T1121] ? handle_mm_fault+0x4ab/0xa50 [ 955.773717][ T1121] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 955.779320][ T1121] ? do_syscall_64+0x26/0x790 [ 955.784284][ T1121] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 955.790370][ T1121] ? do_syscall_64+0x26/0x790 [ 955.795339][ T1121] __x64_sys_setsockopt+0xbe/0x150 [ 955.800569][ T1121] do_syscall_64+0xfa/0x790 [ 955.805341][ T1121] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 955.811248][ T1121] RIP: 0033:0x441269 [ 955.815432][ T1121] Code: 66 69 67 20 69 73 20 6e 6f 74 20 63 6c 65 61 6e 2e 0a 43 68 65 63 6b 20 65 72 72 6f 72 20 6c 6f 67 20 66 6f 72 20 64 65 74 61 <69> 6c 73 2c 20 66 69 78 20 65 72 72 6f 72 73 20 61 6e 64 20 72 65 [ 955.836217][ T1121] RSP: 002b:00007ffe1774d8c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 955.844843][ T1121] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441269 [ 955.852816][ T1121] RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 [ 955.861174][ T1121] RBP: 00000000006cc018 R08: 0000000000000509 R09: 00000000004002c8 [ 955.869346][ T1121] R10: 00000000200002c0 R11: 0000000000000246 R12: 0000000000401fe0 [ 955.877664][ T1121] R13: 0000000000402070 R14: 0000000000000000 R15: 0000000000000000 [ 955.886183][ T1121] INFO: task syz-executor555:10054 blocked for more than 143 seconds. [ 955.894571][ T1121] Not tainted 5.5.0-rc5-syzkaller #0 [ 955.900374][ T1121] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 955.909364][ T1121] syz-executor555 D28160 10054 10051 0x00004004 [ 955.915935][ T1121] Call Trace: [ 955.919246][ T1121] __schedule+0x934/0x1f90 [ 955.923894][ T1121] ? __sched_text_start+0x8/0x8 [ 955.928776][ T1121] ? lock_downgrade+0x920/0x920 [ 955.933889][ T1121] ? rwlock_bug.part.0+0x90/0x90 [ 955.938847][ T1121] schedule+0xdc/0x2b0 [ 955.943031][ T1121] schedule_preempt_disabled+0x13/0x20 [ 955.948904][ T1121] __mutex_lock+0x7ab/0x13c0 [ 955.953669][ T1121] ? hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 955.960202][ T1121] ? mutex_trylock+0x2d0/0x2d0 [ 955.966234][ T1121] ? pcpu_next_md_free_region+0x176/0x350 [ 955.971988][ T1121] ? pcpu_alloc+0x100c/0x1380 [ 955.976955][ T1121] ? mark_held_locks+0xf0/0xf0 [ 955.981828][ T1121] ? __mutex_lock+0x458/0x13c0 [ 955.986892][ T1121] mutex_lock_nested+0x16/0x20 [ 955.991680][ T1121] ? mutex_lock_nested+0x16/0x20 [ 955.996902][ T1121] hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 956.003516][ T1121] hashlimit_mt_check_v1+0x325/0x3ab [ 956.008831][ T1121] ? hashlimit_mt_check_v2+0x3b0/0x3b0 [ 956.018628][ T1121] ? lock_downgrade+0x920/0x920 [ 956.023756][ T1121] ? xt_find_match+0xa6/0x280 [ 956.028482][ T1121] ? mutex_trylock+0x2d0/0x2d0 [ 956.033525][ T1121] ? hashlimit_mt_check_v2+0x3b0/0x3b0 [ 956.039020][ T1121] xt_check_match+0x280/0x690 [ 956.044000][ T1121] ? xt_check_target+0x690/0x690 [ 956.048955][ T1121] ? pcpu_alloc_area+0x820/0x820 [ 956.054213][ T1121] ? mutex_unlock+0xd/0x10 [ 956.058642][ T1121] ? xt_find_match+0x73/0x280 [ 956.063824][ T1121] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 956.070102][ T1121] find_check_entry.isra.0+0x32f/0x920 [ 956.075858][ T1121] ? ipt_do_table+0x1b80/0x1b80 [ 956.080869][ T1121] ? lockdep_hardirqs_on+0x421/0x5e0 [ 956.087171][ T1121] ? trace_hardirqs_on+0x67/0x240 [ 956.092483][ T1121] ? kvfree+0x61/0x70 [ 956.099828][ T1121] translate_table+0xcb4/0x17d0 [ 956.105669][ T1121] ? compat_do_ipt_get_ctl+0x910/0x910 [ 956.111519][ T1121] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 956.118179][ T1121] ? _copy_from_user+0x12c/0x1a0 [ 956.123158][ T1121] do_ipt_set_ctl+0x2fe/0x4c2 [ 956.128101][ T1121] ? compat_do_ipt_set_ctl+0x170/0x170 [ 956.133917][ T1121] ? mutex_unlock+0xd/0x10 [ 956.138370][ T1121] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 956.145677][ T1121] nf_setsockopt+0x77/0xd0 [ 956.150130][ T1121] ip_setsockopt+0xdf/0x100 [ 956.154919][ T1121] tcp_setsockopt+0x8f/0xe0 [ 956.159457][ T1121] sock_common_setsockopt+0x94/0xd0 [ 956.165018][ T1121] __sys_setsockopt+0x261/0x4c0 [ 956.169894][ T1121] ? sock_create_kern+0x50/0x50 [ 956.175051][ T1121] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 956.180654][ T1121] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 956.187233][ T1121] ? handle_mm_fault+0x4ab/0xa50 [ 956.192233][ T1121] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 956.198003][ T1121] ? do_syscall_64+0x26/0x790 [ 956.202712][ T1121] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 956.209124][ T1121] ? do_syscall_64+0x26/0x790 [ 956.214466][ T1121] __x64_sys_setsockopt+0xbe/0x150 [ 956.219609][ T1121] do_syscall_64+0xfa/0x790 [ 956.225537][ T1121] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 956.231465][ T1121] RIP: 0033:0x441269 [ 956.235660][ T1121] Code: 66 69 67 20 69 73 20 6e 6f 74 20 63 6c 65 61 6e 2e 0a 43 68 65 63 6b 20 65 72 72 6f 72 20 6c 6f 67 20 66 6f 72 20 64 65 74 61 <69> 6c 73 2c 20 66 69 78 20 65 72 72 6f 72 73 20 61 6e 64 20 72 65 [ 956.255840][ T1121] RSP: 002b:00007ffe1774d8c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 956.264881][ T1121] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441269 [ 956.273641][ T1121] RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 [ 956.281644][ T1121] RBP: 00000000006cc018 R08: 0000000000000509 R09: 00000000004002c8 [ 956.290291][ T1121] R10: 00000000200002c0 R11: 0000000000000246 R12: 0000000000401fe0 [ 956.298519][ T1121] R13: 0000000000402070 R14: 0000000000000000 R15: 0000000000000000 [ 956.306982][ T1121] INFO: task syz-executor555:10055 blocked for more than 144 seconds. [ 956.316009][ T1121] Not tainted 5.5.0-rc5-syzkaller #0 [ 956.321823][ T1121] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 956.330779][ T1121] syz-executor555 D28160 10055 10052 0x00004004 [ 956.337325][ T1121] Call Trace: [ 956.340637][ T1121] __schedule+0x934/0x1f90 [ 956.345323][ T1121] ? __sched_text_start+0x8/0x8 [ 956.350227][ T1121] ? lock_downgrade+0x920/0x920 [ 956.356342][ T1121] ? rwlock_bug.part.0+0x90/0x90 [ 956.361504][ T1121] schedule+0xdc/0x2b0 [ 956.365977][ T1121] schedule_preempt_disabled+0x13/0x20 [ 956.371588][ T1121] __mutex_lock+0x7ab/0x13c0 [ 956.376568][ T1121] ? hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 956.383130][ T1121] ? mutex_trylock+0x2d0/0x2d0 [ 956.388264][ T1121] ? lockdep_hardirqs_on+0x421/0x5e0 [ 956.394366][ T1121] ? trace_hardirqs_on+0x67/0x240 [ 956.399431][ T1121] ? mark_held_locks+0xf0/0xf0 [ 956.407523][ T1121] mutex_lock_nested+0x16/0x20 [ 956.412313][ T1121] ? mutex_lock_nested+0x16/0x20 [ 956.417575][ T1121] hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 956.424082][ T1121] hashlimit_mt_check_v1+0x325/0x3ab [ 956.429427][ T1121] ? hashlimit_mt_check_v2+0x3b0/0x3b0 [ 956.435363][ T1121] ? lock_downgrade+0x920/0x920 [ 956.440238][ T1121] ? xt_find_match+0xa6/0x280 [ 956.448157][ T1121] ? mutex_trylock+0x2d0/0x2d0 [ 956.452944][ T1121] ? pcpu_alloc+0x6d7/0x1380 [ 956.457965][ T1121] ? hashlimit_mt_check_v2+0x3b0/0x3b0 [ 956.463812][ T1121] xt_check_match+0x280/0x690 [ 956.468665][ T1121] ? xt_check_target+0x690/0x690 [ 956.473908][ T1121] ? pcpu_alloc_area+0x820/0x820 [ 956.478887][ T1121] ? mutex_unlock+0xd/0x10 [ 956.485525][ T1121] ? xt_find_match+0x73/0x280 [ 956.490258][ T1121] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 956.496893][ T1121] find_check_entry.isra.0+0x32f/0x920 [ 956.502396][ T1121] ? ipt_do_table+0x1b80/0x1b80 [ 956.507845][ T1121] ? lockdep_hardirqs_on+0x421/0x5e0 [ 956.513167][ T1121] ? trace_hardirqs_on+0x67/0x240 [ 956.518465][ T1121] ? kvfree+0x61/0x70 [ 956.522484][ T1121] translate_table+0xcb4/0x17d0 [ 956.527650][ T1121] ? compat_do_ipt_get_ctl+0x910/0x910 [ 956.533148][ T1121] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 956.540460][ T1121] ? _copy_from_user+0x12c/0x1a0 [ 956.546227][ T1121] do_ipt_set_ctl+0x2fe/0x4c2 [ 956.551296][ T1121] ? compat_do_ipt_set_ctl+0x170/0x170 [ 956.557171][ T1121] ? mutex_unlock+0xd/0x10 [ 956.561651][ T1121] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 956.568008][ T1121] nf_setsockopt+0x77/0xd0 [ 956.572501][ T1121] ip_setsockopt+0xdf/0x100 [ 956.577306][ T1121] tcp_setsockopt+0x8f/0xe0 [ 956.581846][ T1121] sock_common_setsockopt+0x94/0xd0 [ 956.588394][ T1121] __sys_setsockopt+0x261/0x4c0 [ 956.593454][ T1121] ? sock_create_kern+0x50/0x50 [ 956.598986][ T1121] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 956.604908][ T1121] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 956.611173][ T1121] ? handle_mm_fault+0x4ab/0xa50 [ 956.617364][ T1121] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 956.622955][ T1121] ? do_syscall_64+0x26/0x790 [ 956.627951][ T1121] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 956.634378][ T1121] ? do_syscall_64+0x26/0x790 [ 956.639192][ T1121] __x64_sys_setsockopt+0xbe/0x150 [ 956.644617][ T1121] do_syscall_64+0xfa/0x790 [ 956.649155][ T1121] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 956.655355][ T1121] RIP: 0033:0x441269 [ 956.659263][ T1121] Code: 66 69 67 20 69 73 20 6e 6f 74 20 63 6c 65 61 6e 2e 0a 43 68 65 63 6b 20 65 72 72 6f 72 20 6c 6f 67 20 66 6f 72 20 64 65 74 61 <69> 6c 73 2c 20 66 69 78 20 65 72 72 6f 72 73 20 61 6e 64 20 72 65 [ 956.679182][ T1121] RSP: 002b:00007ffe1774d8c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 956.687876][ T1121] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441269 [ 956.696106][ T1121] RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 [ 956.704365][ T1121] RBP: 00000000006cc018 R08: 0000000000000509 R09: 00000000004002c8 [ 956.712365][ T1121] R10: 00000000200002c0 R11: 0000000000000246 R12: 0000000000401fe0 [ 956.720661][ T1121] R13: 0000000000402070 R14: 0000000000000000 R15: 0000000000000000 [ 956.728914][ T1121] INFO: task syz-executor555:10056 blocked for more than 144 seconds. [ 956.737322][ T1121] Not tainted 5.5.0-rc5-syzkaller #0 [ 956.743124][ T1121] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 956.753062][ T1121] syz-executor555 D27792 10056 10047 0x00004004 [ 956.760034][ T1121] Call Trace: [ 956.763518][ T1121] __schedule+0x934/0x1f90 [ 956.767973][ T1121] ? __sched_text_start+0x8/0x8 [ 956.772829][ T1121] ? lock_downgrade+0x920/0x920 [ 956.778011][ T1121] ? rwlock_bug.part.0+0x90/0x90 [ 956.782989][ T1121] schedule+0xdc/0x2b0 [ 956.787344][ T1121] schedule_preempt_disabled+0x13/0x20 [ 956.792827][ T1121] __mutex_lock+0x7ab/0x13c0 [ 956.797755][ T1121] ? hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 956.804500][ T1121] ? mutex_trylock+0x2d0/0x2d0 [ 956.809300][ T1121] ? pcpu_next_md_free_region+0x176/0x350 [ 956.815372][ T1121] ? pcpu_alloc+0x100c/0x1380 [ 956.820075][ T1121] ? mark_held_locks+0xf0/0xf0 [ 956.825244][ T1121] ? __mutex_lock+0x458/0x13c0 [ 956.830048][ T1121] mutex_lock_nested+0x16/0x20 [ 956.835118][ T1121] ? mutex_lock_nested+0x16/0x20 [ 956.840341][ T1121] hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 956.847003][ T1121] hashlimit_mt_check_v1+0x325/0x3ab [ 956.852308][ T1121] ? hashlimit_mt_check_v2+0x3b0/0x3b0 [ 956.858098][ T1121] ? lock_downgrade+0x920/0x920 [ 956.862997][ T1121] ? xt_find_match+0xa6/0x280 [ 956.867974][ T1121] ? mutex_trylock+0x2d0/0x2d0 [ 956.872875][ T1121] ? hashlimit_mt_check_v2+0x3b0/0x3b0 [ 956.879574][ T1121] xt_check_match+0x280/0x690 [ 956.884500][ T1121] ? xt_check_target+0x690/0x690 [ 956.889468][ T1121] ? pcpu_alloc_area+0x820/0x820 [ 956.894659][ T1121] ? mutex_unlock+0xd/0x10 [ 956.899109][ T1121] ? xt_find_match+0x73/0x280 [ 956.904054][ T1121] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 956.910583][ T1121] find_check_entry.isra.0+0x32f/0x920 [ 956.916328][ T1121] ? ipt_do_table+0x1b80/0x1b80 [ 956.921209][ T1121] ? lockdep_hardirqs_on+0x421/0x5e0 [ 956.926759][ T1121] ? trace_hardirqs_on+0x67/0x240 [ 956.931888][ T1121] ? kvfree+0x61/0x70 [ 956.936248][ T1121] translate_table+0xcb4/0x17d0 [ 956.941145][ T1121] ? compat_do_ipt_get_ctl+0x910/0x910 [ 956.946871][ T1121] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 956.953124][ T1121] ? _copy_from_user+0x12c/0x1a0 [ 956.958334][ T1121] do_ipt_set_ctl+0x2fe/0x4c2 [ 956.963062][ T1121] ? compat_do_ipt_set_ctl+0x170/0x170 [ 956.968775][ T1121] ? mutex_unlock+0xd/0x10 [ 956.973418][ T1121] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 956.979435][ T1121] nf_setsockopt+0x77/0xd0 [ 956.984096][ T1121] ip_setsockopt+0xdf/0x100 [ 956.988611][ T1121] tcp_setsockopt+0x8f/0xe0 [ 956.993462][ T1121] sock_common_setsockopt+0x94/0xd0 [ 956.998683][ T1121] __sys_setsockopt+0x261/0x4c0 [ 957.004720][ T1121] ? sock_create_kern+0x50/0x50 [ 957.009601][ T1121] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 957.015385][ T1121] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 957.021658][ T1121] ? handle_mm_fault+0x4ab/0xa50 [ 957.026892][ T1121] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 957.032394][ T1121] ? do_syscall_64+0x26/0x790 [ 957.037346][ T1121] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 957.043696][ T1121] ? do_syscall_64+0x26/0x790 [ 957.048412][ T1121] __x64_sys_setsockopt+0xbe/0x150 [ 957.053795][ T1121] do_syscall_64+0xfa/0x790 [ 957.058316][ T1121] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 957.064528][ T1121] RIP: 0033:0x441269 [ 957.068466][ T1121] Code: 66 69 67 20 69 73 20 6e 6f 74 20 63 6c 65 61 6e 2e 0a 43 68 65 63 6b 20 65 72 72 6f 72 20 6c 6f 67 20 66 6f 72 20 64 65 74 61 <69> 6c 73 2c 20 66 69 78 20 65 72 72 6f 72 73 20 61 6e 64 20 72 65 [ 957.088543][ T1121] RSP: 002b:00007ffe1774d8c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 957.097263][ T1121] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441269 [ 957.105523][ T1121] RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 [ 957.113766][ T1121] RBP: 00000000006cc018 R08: 0000000000000509 R09: 00000000004002c8 [ 957.121749][ T1121] R10: 00000000200002c0 R11: 0000000000000246 R12: 0000000000401fe0 [ 957.130238][ T1121] R13: 0000000000402070 R14: 0000000000000000 R15: 0000000000000000 [ 957.139516][ T1121] INFO: task syz-executor555:10058 blocked for more than 145 seconds. [ 957.148088][ T1121] Not tainted 5.5.0-rc5-syzkaller #0 [ 957.154135][ T1121] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 957.162819][ T1121] syz-executor555 D28160 10058 10050 0x00004004 [ 957.169480][ T1121] Call Trace: [ 957.172793][ T1121] __schedule+0x934/0x1f90 [ 957.177456][ T1121] ? __sched_text_start+0x8/0x8 [ 957.182327][ T1121] ? lock_downgrade+0x920/0x920 [ 957.187547][ T1121] ? rwlock_bug.part.0+0x90/0x90 [ 957.192544][ T1121] schedule+0xdc/0x2b0 [ 957.196885][ T1121] schedule_preempt_disabled+0x13/0x20 [ 957.202507][ T1121] __mutex_lock+0x7ab/0x13c0 [ 957.207420][ T1121] ? hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 957.214211][ T1121] ? mutex_trylock+0x2d0/0x2d0 [ 957.219016][ T1121] ? pcpu_alloc+0x100c/0x1380 [ 957.223964][ T1121] ? mark_held_locks+0xf0/0xf0 [ 957.229190][ T1121] ? __mutex_lock+0x458/0x13c0 [ 957.234370][ T1121] mutex_lock_nested+0x16/0x20 [ 957.239201][ T1121] ? mutex_lock_nested+0x16/0x20 [ 957.244409][ T1121] hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 957.250778][ T1121] hashlimit_mt_check_v1+0x325/0x3ab [ 957.256381][ T1121] ? hashlimit_mt_check_v2+0x3b0/0x3b0 [ 957.261851][ T1121] ? lock_downgrade+0x920/0x920 [ 957.268124][ T1121] ? xt_find_match+0xa6/0x280 [ 957.272842][ T1121] ? mutex_trylock+0x2d0/0x2d0 [ 957.277995][ T1121] ? hashlimit_mt_check_v2+0x3b0/0x3b0 [ 957.283849][ T1121] xt_check_match+0x280/0x690 [ 957.288555][ T1121] ? xt_check_target+0x690/0x690 [ 957.293772][ T1121] ? pcpu_alloc_area+0x820/0x820 [ 957.298835][ T1121] ? mutex_unlock+0xd/0x10 [ 957.303523][ T1121] ? xt_find_match+0x73/0x280 [ 957.308222][ T1121] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 957.314773][ T1121] find_check_entry.isra.0+0x32f/0x920 [ 957.320265][ T1121] ? ipt_do_table+0x1b80/0x1b80 [ 957.325419][ T1121] ? lockdep_hardirqs_on+0x421/0x5e0 [ 957.330744][ T1121] ? trace_hardirqs_on+0x67/0x240 [ 957.336051][ T1121] ? kvfree+0x61/0x70 [ 957.340072][ T1121] translate_table+0xcb4/0x17d0 [ 957.345153][ T1121] ? compat_do_ipt_get_ctl+0x910/0x910 [ 957.350646][ T1121] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 957.357094][ T1121] ? _copy_from_user+0x12c/0x1a0 [ 957.362041][ T1121] do_ipt_set_ctl+0x2fe/0x4c2 [ 957.366993][ T1121] ? compat_do_ipt_set_ctl+0x170/0x170 [ 957.372479][ T1121] ? mutex_unlock+0xd/0x10 [ 957.377121][ T1121] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 957.383113][ T1121] nf_setsockopt+0x77/0xd0 [ 957.387829][ T1121] ip_setsockopt+0xdf/0x100 [ 957.392362][ T1121] tcp_setsockopt+0x8f/0xe0 [ 957.398115][ T1121] sock_common_setsockopt+0x94/0xd0 [ 957.403490][ T1121] __sys_setsockopt+0x261/0x4c0 [ 957.408355][ T1121] ? sock_create_kern+0x50/0x50 [ 957.413443][ T1121] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 957.419002][ T1121] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 957.425428][ T1121] ? handle_mm_fault+0x4ab/0xa50 [ 957.430398][ T1121] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 957.436051][ T1121] ? do_syscall_64+0x26/0x790 [ 957.440735][ T1121] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 957.447088][ T1121] ? do_syscall_64+0x26/0x790 [ 957.451796][ T1121] __x64_sys_setsockopt+0xbe/0x150 [ 957.457192][ T1121] do_syscall_64+0xfa/0x790 [ 957.461715][ T1121] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 957.467864][ T1121] RIP: 0033:0x441269 [ 957.471768][ T1121] Code: 66 69 67 20 69 73 20 6e 6f 74 20 63 6c 65 61 6e 2e 0a 43 68 65 63 6b 20 65 72 72 6f 72 20 6c 6f 67 20 66 6f 72 20 64 65 74 61 <69> 6c 73 2c 20 66 69 78 20 65 72 72 6f 72 73 20 61 6e 64 20 72 65 [ 957.492084][ T1121] RSP: 002b:00007ffe1774d8c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 957.500739][ T1121] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441269 [ 957.509097][ T1121] RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 [ 957.517246][ T1121] RBP: 00000000000c318f R08: 0000000000000509 R09: 00000009004002c8 [ 957.526384][ T1121] R10: 00000000200002c0 R11: 0000000000000246 R12: 0000000000401fe0 [ 957.534614][ T1121] R13: 0000000000402070 R14: 0000000000000000 R15: 0000000000000000 [ 957.542623][ T1121] [ 957.542623][ T1121] Showing all locks held in the system: [ 957.550663][ T1121] 1 lock held by khungtaskd/1121: [ 957.555841][ T1121] #0: ffffffff899a3f40 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x279 [ 957.565469][ T1121] 3 locks held by rs:main Q:Reg/9929: [ 957.570956][ T1121] #0: ffff8880ae837358 (&rq->lock){-.-.}, at: __schedule+0x232/0x1f90 [ 957.579699][ T1121] #1: ffffffff899a3f40 (rcu_read_lock){....}, at: vfs_write+0x485/0x5d0 [ 957.588652][ T1121] #2: ffff888091a3b588 (&sb->s_type->i_mutex_key#11){+.+.}, at: ext4_buffered_write_iter+0xba/0x460 [ 957.600017][ T1121] 1 lock held by rsyslogd/9931: [ 957.605105][ T1121] #0: ffff8880a26511a0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 957.614300][ T1121] 2 locks held by getty/10021: [ 957.619112][ T1121] #0: ffff888098196090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 957.628530][ T1121] #1: ffffc9000174b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 957.638566][ T1121] 2 locks held by getty/10022: [ 957.643570][ T1121] #0: ffff888093340090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 957.652548][ T1121] #1: ffffc900017eb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 957.663660][ T1121] 2 locks held by getty/10023: [ 957.668585][ T1121] #0: ffff8880a7891090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 957.677885][ T1121] #1: ffffc900017ab2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 957.687868][ T1121] 2 locks held by getty/10024: [ 957.692652][ T1121] #0: ffff88809400f090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 957.701943][ T1121] #1: ffffc900017db2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 957.711841][ T1121] 2 locks held by getty/10025: [ 957.716841][ T1121] #0: ffff888097d44090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 957.726182][ T1121] #1: ffffc900017bb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 957.736033][ T1121] 2 locks held by getty/10026: [ 957.740813][ T1121] #0: ffff88809243e090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 957.750317][ T1121] #1: ffffc900017cb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 957.760300][ T1121] 2 locks held by getty/10027: [ 957.765301][ T1121] #0: ffff8880a6821090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 957.774610][ T1121] #1: ffffc9000172b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 957.784491][ T1121] 1 lock held by syz-executor555/10048: [ 957.790054][ T1121] 1 lock held by syz-executor555/10053: [ 957.797416][ T1121] #0: ffffffff8a562ee0 (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 957.808390][ T1121] 1 lock held by syz-executor555/10054: [ 957.814163][ T1121] #0: ffffffff8a562ee0 (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 957.825126][ T1121] 1 lock held by syz-executor555/10055: [ 957.830682][ T1121] #0: ffffffff8a562ee0 (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 957.841721][ T1121] 1 lock held by syz-executor555/10056: [ 957.847433][ T1121] #0: ffffffff8a562ee0 (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 957.858456][ T1121] 1 lock held by syz-executor555/10058: [ 957.864240][ T1121] #0: ffffffff8a562ee0 (hashlimit_mutex){+.+.}, at: hashlimit_mt_check_common.isra.0+0x341/0x1500 [ 957.875360][ T1121] [ 957.877695][ T1121] ============================================= [ 957.877695][ T1121] [ 957.886548][ T1121] NMI backtrace for cpu 1 [ 957.890892][ T1121] CPU: 1 PID: 1121 Comm: khungtaskd Not tainted 5.5.0-rc5-syzkaller #0 [ 957.899141][ T1121] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 957.909308][ T1121] Call Trace: [ 957.912696][ T1121] dump_stack+0x197/0x210 [ 957.917075][ T1121] nmi_cpu_backtrace.cold+0x70/0xb2 [ 957.922284][ T1121] ? vprintk_func+0x86/0x189 [ 957.927010][ T1121] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 957.932677][ T1121] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 957.938790][ T1121] arch_trigger_cpumask_backtrace+0x14/0x20 [ 957.944794][ T1121] watchdog+0xb11/0x10c0 [ 957.949127][ T1121] kthread+0x361/0x430 [ 957.953212][ T1121] ? reset_hung_task_detector+0x30/0x30 [ 957.958761][ T1121] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 957.964598][ T1121] ret_from_fork+0x24/0x30 [ 957.969262][ T1121] Sending NMI from CPU 1 to CPUs 0: [ 957.975176][ C0] NMI backtrace for cpu 0 [ 957.975184][ C0] CPU: 0 PID: 10048 Comm: syz-executor555 Not tainted 5.5.0-rc5-syzkaller #0 [ 957.975191][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 957.975195][ C0] RIP: 0010:debug_lockdep_rcu_enabled+0x53/0xa0 [ 957.975208][ C0] Code: 04 84 d2 75 49 8b 15 9c 4b 1b 09 85 d2 74 3b 48 c7 c0 34 b6 7c 8a 48 ba 00 00 00 00 00 fc ff df 48 89 c1 83 e0 07 48 c1 e9 03 <83> c0 03 0f b6 14 11 38 d0 7c 04 84 d2 75 23 8b 05 6c 7c 1b 09 85 [ 957.975212][ C0] RSP: 0018:ffffc900020f7758 EFLAGS: 00000a07 [ 957.975220][ C0] RAX: 0000000000000004 RBX: 0000000000000000 RCX: 1ffffffff14f96c6 [ 957.975225][ C0] RDX: dffffc0000000000 RSI: ffffffff899a3f00 RDI: 0000000000000282 [ 957.975230][ C0] RBP: ffffc900020f7758 R08: 1ffffffff16611b1 R09: fffffbfff16611b2 [ 957.975236][ C0] R10: fffffbfff16611b1 R11: ffffffff8b308d8f R12: ffffffff88de1100 [ 957.975241][ C0] R13: 0000000000000184 R14: ffffc9000d74a000 R15: 000000000dbd6db6 [ 957.975247][ C0] FS: 00000000026be880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 957.975251][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 957.975257][ C0] CR2: ffffffffff600400 CR3: 00000000a0663000 CR4: 00000000001406f0 [ 957.975263][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 957.975268][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 957.975271][ C0] Call Trace: [ 957.975274][ C0] ___might_sleep+0x30/0x2c0 [ 957.975278][ C0] htable_selective_cleanup+0x22c/0x330 [ 957.975281][ C0] ? esp_mt+0x410/0x410 [ 957.975285][ C0] htable_put+0x176/0x220 [ 957.975289][ C0] ? hashlimit_mt_destroy_v2+0x70/0x70 [ 957.975292][ C0] hashlimit_mt_destroy_v1+0x50/0x70 [ 957.975296][ C0] cleanup_match+0xde/0x170 [ 957.975299][ C0] ? icmp_checkentry+0xa0/0xa0 [ 957.975304][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 957.975308][ C0] find_check_entry.isra.0+0x454/0x920 [ 957.975311][ C0] ? ipt_do_table+0x1b80/0x1b80 [ 957.975315][ C0] ? lockdep_hardirqs_on+0x421/0x5e0 [ 957.975318][ C0] ? kvfree+0x61/0x70 [ 957.975321][ C0] translate_table+0xcb4/0x17d0 [ 957.975325][ C0] ? compat_do_ipt_get_ctl+0x910/0x910 [ 957.975330][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 957.975334][ C0] ? _copy_from_user+0x12c/0x1a0 [ 957.975337][ C0] do_ipt_set_ctl+0x2fe/0x4c2 [ 957.975341][ C0] ? compat_do_ipt_set_ctl+0x170/0x170 [ 957.975344][ C0] ? mutex_unlock+0xd/0x10 [ 957.975349][ C0] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 957.975352][ C0] nf_setsockopt+0x77/0xd0 [ 957.975355][ C0] ip_setsockopt+0xdf/0x100 [ 957.975359][ C0] tcp_setsockopt+0x8f/0xe0 [ 957.975362][ C0] sock_common_setsockopt+0x94/0xd0 [ 957.975366][ C0] __sys_setsockopt+0x261/0x4c0 [ 957.975370][ C0] ? sock_create_kern+0x50/0x50 [ 957.975374][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 957.975378][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 957.975382][ C0] ? handle_mm_fault+0x4ab/0xa50 [ 957.975386][ C0] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 957.975389][ C0] ? do_syscall_64+0x26/0x790 [ 957.975393][ C0] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 957.975397][ C0] ? do_syscall_64+0x26/0x790 [ 957.975401][ C0] __x64_sys_setsockopt+0xbe/0x150 [ 957.975404][ C0] do_syscall_64+0xfa/0x790 [ 957.975408][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 957.975411][ C0] RIP: 0033:0x441269 [ 957.975430][ C0] 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 [ 957.975434][ C0] RSP: 002b:00007ffe1774d8c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 957.975444][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441269 [ 957.975449][ C0] RDX: 0000000000000040 RSI: 0004000000000000 RDI: 0000000000000003 [ 957.975455][ C0] RBP: 00000000006cc018 R08: 0000000000000509 R09: 00000000004002c8 [ 957.975460][ C0] R10: 00000000200002c0 R11: 0000000000000246 R12: 0000000000401fe0 [ 957.975466][ C0] R13: 0000000000402070 R14: 0000000000000000 R15: 0000000000000000 [ 957.977435][ T1121] Kernel panic - not syncing: hung_task: blocked tasks [ 958.387420][ T1121] CPU: 1 PID: 1121 Comm: khungtaskd Not tainted 5.5.0-rc5-syzkaller #0 [ 958.395709][ T1121] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 958.405778][ T1121] Call Trace: [ 958.409104][ T1121] dump_stack+0x197/0x210 [ 958.413559][ T1121] panic+0x2e3/0x75c [ 958.417473][ T1121] ? add_taint.cold+0x16/0x16 [ 958.422157][ T1121] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 958.427807][ T1121] ? ___preempt_schedule+0x16/0x18 [ 958.432946][ T1121] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 958.439130][ T1121] ? nmi_trigger_cpumask_backtrace+0x24c/0x28b [ 958.445292][ T1121] ? nmi_trigger_cpumask_backtrace+0x256/0x28b [ 958.451568][ T1121] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 958.458012][ T1121] watchdog+0xb22/0x10c0 [ 958.462407][ T1121] kthread+0x361/0x430 [ 958.466492][ T1121] ? reset_hung_task_detector+0x30/0x30 [ 958.472268][ T1121] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 958.478113][ T1121] ret_from_fork+0x24/0x30 [ 958.484456][ T1121] Kernel Offset: disabled [ 958.488815][ T1121] Rebooting in 86400 seconds..