[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [ 30.737819] kauditd_printk_skb: 9 callbacks suppressed [ 30.737831] audit: type=1800 audit(1541570435.214:33): pid=5655 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 30.766383] audit: type=1800 audit(1541570435.224:34): pid=5655 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 49.152058] audit: type=1400 audit(1541570453.634:35): avc: denied { map } for pid=5832 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.89' (ECDSA) to the list of known hosts. executing program [ 355.156164] audit: type=1400 audit(1541570759.634:36): avc: denied { map } for pid=5844 comm="syz-executor394" path="/root/syz-executor394608217" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 355.241410] sched: DL replenish lagged too much [ 355.256141] hrtimer: interrupt took 4865786 ns [ 497.481290] rcu: INFO: rcu_preempt self-detected stall on CPU [ 497.487351] rcu: 0-....: (14214 ticks this GP) idle=f0a/1/0x4000000000000002 softirq=6436/6438 fqs=5244 [ 497.497214] rcu: (t=10500 jiffies g=4517 q=5) [ 497.501885] NMI backtrace for cpu 0 [ 497.505580] CPU: 0 PID: 5844 Comm: syz-executor394 Not tainted 4.20.0-rc1+ #102 [ 497.513014] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 497.522353] Call Trace: [ 497.524921] [ 497.527114] dump_stack+0x244/0x39d [ 497.530731] ? dump_stack_print_info.cold.1+0x20/0x20 [ 497.535959] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 497.541531] ? do_raw_spin_lock+0x14f/0x350 [ 497.545849] nmi_cpu_backtrace.cold.2+0x5c/0xa1 [ 497.550525] ? lapic_can_unplug_cpu.cold.27+0x3f/0x3f [ 497.555711] nmi_trigger_cpumask_backtrace+0x1e8/0x22a [ 497.561000] arch_trigger_cpumask_backtrace+0x14/0x20 [ 497.566204] rcu_dump_cpu_stacks+0x16f/0x1bc [ 497.570696] print_cpu_stall.cold.67+0x1f3/0x3c7 [ 497.575451] ? print_other_cpu_stall+0x160/0x160 [ 497.580192] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 497.585723] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 497.591320] ? do_trace_rcu_torture_read+0x10/0x10 [ 497.596251] ? rcu_preempt_need_deferred_qs+0x74/0x1f0 [ 497.601559] ? __lock_is_held+0xb5/0x140 [ 497.605615] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 497.611157] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 497.616721] ? check_preemption_disabled+0x48/0x280 [ 497.621742] rcu_check_callbacks+0xf3b/0x13f0 [ 497.626225] ? rcutree_dead_cpu+0x10/0x10 [ 497.630388] ? lock_downgrade+0x900/0x900 [ 497.634526] ? lock_release+0x930/0xa00 [ 497.638483] ? zap_class+0x640/0x640 [ 497.642191] ? zap_class+0x640/0x640 [ 497.645899] ? zap_class+0x640/0x640 [ 497.649607] ? zap_class+0x640/0x640 [ 497.653469] ? find_held_lock+0x36/0x1c0 [ 497.657530] ? cpuacct_account_field+0x219/0x3d0 [ 497.662287] ? zap_class+0x640/0x640 [ 497.665993] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 497.671514] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 497.677047] ? check_preemption_disabled+0x48/0x280 [ 497.682070] ? trace_hardirqs_off+0xb8/0x310 [ 497.686469] ? __lock_is_held+0xb5/0x140 [ 497.690521] ? trace_hardirqs_on+0x310/0x310 [ 497.694927] ? check_preemption_disabled+0x48/0x280 [ 497.699970] ? raise_softirq+0x199/0x420 [ 497.704030] ? raise_softirq_irqoff+0x2e0/0x2e0 [ 497.708806] ? account_system_index_time+0x333/0x5d0 [ 497.713953] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 497.719483] ? check_preemption_disabled+0x48/0x280 [ 497.724488] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 497.730042] ? hrtimer_run_queues+0x9a/0x400 [ 497.734444] ? run_local_timers+0x19b/0x230 [ 497.738750] ? timer_clear_idle+0x90/0x90 [ 497.742952] ? irqtime_account_process_tick.isra.6+0x35b/0x490 [ 497.748917] ? account_process_tick+0x282/0x350 [ 497.753580] update_process_times+0x2d/0x70 [ 497.757934] tick_sched_handle+0x9f/0x180 [ 497.762073] tick_sched_timer+0x45/0x130 [ 497.766135] __hrtimer_run_queues+0x41c/0x10d0 [ 497.770711] ? tick_sched_do_timer+0x1a0/0x1a0 [ 497.775286] ? hrtimer_start_range_ns+0xe00/0xe00 [ 497.780166] ? pvclock_read_flags+0x160/0x160 [ 497.784796] ? trace_hardirqs_on+0x310/0x310 [ 497.789205] ? kvm_clock_read+0x18/0x30 [ 497.793171] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 497.798181] ? ktime_get_update_offsets_now+0x3b3/0x540 [ 497.803537] ? do_timer+0x50/0x50 [ 497.806981] ? rwlock_bug.part.2+0x90/0x90 [ 497.811206] ? trace_hardirqs_on+0x310/0x310 [ 497.815608] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 497.821130] ? clockevents_program_event+0x140/0x370 [ 497.826228] hrtimer_interrupt+0x313/0x780 [ 497.830510] smp_apic_timer_interrupt+0x1a1/0x760 [ 497.835348] ? smp_reschedule_interrupt+0x109/0x650 [ 497.840359] ? smp_call_function_single_interrupt+0x650/0x650 [ 497.846253] ? interrupt_entry+0xb5/0xc0 [ 497.850304] ? trace_hardirqs_off_caller+0xbb/0x310 [ 497.855355] ? trace_hardirqs_off_caller+0xbb/0x310 [ 497.860483] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 497.865338] ? trace_hardirqs_on_caller+0x310/0x310 [ 497.870359] ? trace_hardirqs_on_caller+0x310/0x310 [ 497.875363] ? task_prio+0x50/0x50 [ 497.878889] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 497.884737] ? check_preemption_disabled+0x48/0x280 [ 497.889740] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 497.894576] apic_timer_interrupt+0xf/0x20 [ 497.898795] [ 497.901280] RIP: 0010:lock_acquire+0x268/0x520 [ 497.905893] Code: 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 44 02 00 00 48 83 3d 87 21 f0 07 00 0f 84 c3 01 00 00 48 8b bd 20 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 [ 497.924980] RSP: 0018:ffff8801c17e7058 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 497.932673] RAX: dffffc0000000000 RBX: 1ffff100382fce10 RCX: 0000000000000000 [ 497.939929] RDX: 1ffffffff12a3f76 RSI: 0000000000000000 RDI: 0000000000000286 [ 497.947296] RBP: ffff8801c17e7148 R08: ffff8801c2232ce0 R09: 0000000000000008 [ 497.954650] R10: 0000000000004e94 R11: ffff8801c2232440 R12: ffff8801c2232440 [ 497.961905] R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000000 [ 497.969275] ? lock_release+0xa00/0xa00 [ 497.973242] ? perf_trace_sched_process_exec+0x860/0x860 [ 497.978684] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 497.984209] ? rcu_pm_notify+0xc0/0xc0 [ 497.988105] down_read+0x8d/0x120 [ 497.991580] ? pagemap_read+0x8eb/0xb50 [ 497.995551] ? __down_interruptible+0x700/0x700 [ 498.000254] ? security_capable+0x99/0xc0 [ 498.004415] pagemap_read+0x8eb/0xb50 [ 498.008222] ? m_start+0x8a0/0x8a0 [ 498.011782] ? fsnotify_first_mark+0x350/0x350 [ 498.016397] ? __fsnotify_parent+0xcc/0x420 [ 498.020719] ? __might_sleep+0x95/0x190 [ 498.024686] ? __sanitizer_cov_trace_pc+0x41/0x50 [ 498.029553] ? iov_iter_advance+0x306/0x13f0 [ 498.033954] ? smaps_pte_range+0x1cc0/0x1cc0 [ 498.038348] ? m_next+0x110/0x110 [ 498.041830] ? smaps_hugetlb_range+0xf40/0xf40 [ 498.046408] ? _copy_to_iter_mcsafe+0x1680/0x1680 [ 498.051244] ? security_file_permission+0x1c2/0x220 [ 498.056314] ? rw_verify_area+0x118/0x360 [ 498.060471] do_iter_read+0x4a3/0x650 [ 498.064272] vfs_readv+0x175/0x1c0 [ 498.067870] ? compat_rw_copy_check_uvector+0x440/0x440 [ 498.073290] ? __put_page+0x122/0x190 [ 498.077083] ? trace_hardirqs_off_caller+0x310/0x310 [ 498.082185] ? mark_free_pages+0x3c0/0x3c0 [ 498.086474] ? release_sock+0x1ec/0x2c0 [ 498.090447] ? __local_bh_enable_ip+0x160/0x260 [ 498.095103] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 498.100109] ? iov_iter_pipe+0xbb/0x2f0 [ 498.104105] default_file_splice_read+0x539/0xb20 [ 498.108944] ? iter_file_splice_write+0x1050/0x1050 [ 498.113943] ? __put_page+0x136/0x190 [ 498.117778] ? __put_compound_page+0xe0/0xe0 [ 498.122178] ? kernel_sendpage+0x9a/0xf0 [ 498.126249] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 498.131001] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 498.135698] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 498.140440] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 498.145904] ? pipe_to_sendpage+0x305/0x400 [ 498.150213] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 498.155739] ? fsnotify+0x4e5/0xf20 [ 498.159351] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 498.164105] ? security_file_permission+0x1c2/0x220 [ 498.169108] ? iter_file_splice_write+0x1050/0x1050 [ 498.174156] do_splice_to+0x12e/0x190 [ 498.177954] splice_direct_to_actor+0x270/0x8f0 [ 498.182615] ? pipe_to_sendpage+0x400/0x400 [ 498.186923] ? do_splice_to+0x190/0x190 [ 498.190933] ? write_comp_data+0x4/0x70 [ 498.194961] do_splice_direct+0x2d4/0x420 [ 498.199165] ? splice_direct_to_actor+0x8f0/0x8f0 [ 498.204124] ? rw_verify_area+0x118/0x360 [ 498.208275] do_sendfile+0x62a/0xe20 [ 498.212015] ? do_compat_pwritev64+0x1c0/0x1c0 [ 498.216604] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 498.222138] ? _copy_from_user+0xdf/0x150 [ 498.226314] __x64_sys_sendfile64+0x15d/0x250 [ 498.230803] ? __ia32_sys_sendfile+0x2a0/0x2a0 [ 498.235375] do_syscall_64+0x1b9/0x820 [ 498.239347] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 498.244708] ? syscall_return_slowpath+0x5e0/0x5e0 [ 498.249627] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 498.254458] ? trace_hardirqs_on_caller+0x310/0x310 [ 498.259464] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 498.264466] ? prepare_exit_to_usermode+0x291/0x3b0 [ 498.269468] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 498.274350] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 498.279530] RIP: 0033:0x440369 [ 498.282710] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 498.301711] RSP: 002b:00007fff606ea3f8 EFLAGS: 00000213 ORIG_RAX: 0000000000000028 [ 498.309408] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440369 [ 498.316663] RDX: 0000000020000040 RSI: 0000000000000006 RDI: 0000000000000005 [ 498.323915] RBP: 00000000006ca018 R08: 0000000000000012 R09: 65732f636f72702f [ 498.331168] R10: 0010000000000443 R11: 0000000000000213 R12: 0000000000401c50 [ 498.338423] R13: 0000000000401ce0 R14: 0000000000000000 R15: 0000000000000000