[ 42.527064][ T25] audit: type=1800 audit(1575349772.833:27): pid=8020 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 42.588267][ T25] audit: type=1800 audit(1575349772.853:28): pid=8020 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 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. [ 43.323536][ T25] audit: type=1800 audit(1575349773.663:29): pid=8020 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 43.343061][ T25] audit: type=1800 audit(1575349773.663:30): pid=8020 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.0.27' (ECDSA) to the list of known hosts. 2019/12/03 05:09:44 fuzzer started 2019/12/03 05:09:46 dialing manager at 10.128.0.26:38907 2019/12/03 05:09:46 syscalls: 2697 2019/12/03 05:09:46 code coverage: enabled 2019/12/03 05:09:46 comparison tracing: enabled 2019/12/03 05:09:46 extra coverage: extra coverage is not supported by the kernel 2019/12/03 05:09:46 setuid sandbox: enabled 2019/12/03 05:09:46 namespace sandbox: enabled 2019/12/03 05:09:46 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/03 05:09:46 fault injection: enabled 2019/12/03 05:09:46 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/03 05:09:46 net packet injection: enabled 2019/12/03 05:09:46 net device setup: enabled 2019/12/03 05:09:46 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/03 05:09:46 devlink PCI setup: PCI device 0000:00:10.0 is not available 05:09:47 executing program 0: openat$ipvs(0xffffffffffffff9c, &(0x7f0000000000)='/proc/sys/net/ipv4/vs/pmtu_disc\x00', 0x2, 0x0) recvmmsg(0xffffffffffffffff, &(0x7f0000001bc0)=[{{&(0x7f0000000040)=@pppoe={0x18, 0x0, {0x0, @link_local}}, 0x0, &(0x7f0000000140)=[{&(0x7f0000000340)=""/117}, {&(0x7f00000003c0)=""/251}, {&(0x7f00000004c0)=""/172}]}, 0xfffffff8}, {{&(0x7f0000000600)=@un=@abs, 0x0, &(0x7f00000006c0)=[{&(0x7f0000000680)=""/50}, {&(0x7f0000000780)=""/186}], 0x0, &(0x7f0000000840)=""/230}}, {{&(0x7f0000000940)=@in={0x2, 0x0, @initdev}, 0x0, &(0x7f0000001a80)=[{&(0x7f0000000700)=""/29}, {&(0x7f00000009c0)=""/4096}, {&(0x7f0000001c80)=""/107}, {&(0x7f0000001a40)=""/43}], 0x0, &(0x7f0000001ac0)=""/202}}], 0x40001b6, 0x0, 0x0) r0 = syz_open_procfs(0x0, &(0x7f0000000180)='fd/3\x00\x02\x17\x87:\xf4\x03\xdfc\x88,5I\xd7^\xb5D\xf7\xd7\xdb,(\x03\x00\xc2\x06MG\xcd\xe9w\xe5s\x02\xf2\xea\xb6\xabsp\x12xT8\x01\x00\xd4S\xd8F\xab.x|\x8b\x87\xb0\xa2\xf5Y>\xb1 p\x998(\xe63\xcf\x7f\xac\x89F\x03n\x96\x15zsw\x98\xca\xcb3\xb6M=h\x01i.\xa3\xda}\x190~\xe7d6\xa5\x17\xb3\xe9\xd9QV\x0f\xf3\x02\xd6\xc1\xc3n\xcd*R\x9a\x95\x12\x05K\xa0<\xc9\xe3\xed\xab\xc9\x8bK\xb3\x86\xe2\x93f\x92iKA|e\x97k :,J36\x11\xf0\x99\x96\xb7]\xfd\xe3\v\xd8\x98\xc5o\xc6\xde\x80\xf7_\xc9\x8f\xaf\xf9\xd5\xb7ui\xea\xde\xd0\xeb\xd9\xf5_\v\xe2*\xa3\xf4\xab?n\xcb\x19i\x80\x91\xd2\xf6\x14\xfe!!0\x84L\x86\x81\x95,B\x11\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\xab*[\xa5\xb217\x93\xf3\x88\x92\xa6\xde\x11\xa2-J\x9d\xc9\xb2\x97\xa3\x88v\x9eR\x155\xc7N!\xdb\"8\xc8I\xb9c\xed\xa7!\t\x85s\xb1\xa5\xa7R2Yf\x1c\xf8\xc2z>\xb1\x9c\x02a\x87\xe9\xb8\xf8\xdcv\xb6\xe4\xa6\n\x0e\x83lM7\xcc?\xea\x19\x99\xce\x1c\x10\xd2lQ(\xc7\xe9\xef\xd2Q\vY\xf58\x10|8}uE\xaf\xb4w;\xbc\xe4\x01\xd8\xf2\xf9u\xc1Dt\'\x84\xb5\xa4\x83\xeft\xfc\xf3\t\x87qsmask 0x0 [ 166.191093][ C1] rcu_preempt R running task 29104 10 2 0x80004008 [ 166.199011][ C1] Call Trace: [ 166.202280][ C1] [ 166.205154][ C1] sched_show_task+0x40f/0x560 [ 166.209912][ C1] rcu_sched_clock_irq+0x1861/0x1ad0 [ 166.215622][ C1] update_process_times+0x12d/0x180 [ 166.220826][ C1] tick_sched_timer+0x263/0x420 [ 166.225836][ C1] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 166.231366][ C1] __hrtimer_run_queues+0x403/0x840 [ 166.236562][ C1] hrtimer_interrupt+0x38c/0xda0 [ 166.241511][ C1] ? debug_smp_processor_id+0x9/0x20 [ 166.246785][ C1] smp_apic_timer_interrupt+0x109/0x280 [ 166.252317][ C1] apic_timer_interrupt+0xf/0x20 [ 166.257236][ C1] [ 166.260161][ C1] RIP: 0010:free_thread_stack+0x15e/0x590 [ 166.265865][ C1] Code: 08 4c 89 e7 e8 43 a4 69 00 49 8b 1c 24 48 83 c3 08 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 25 a4 69 00 48 8b 3b fc ff ff ff e8 28 04 00 00 43 80 3c 2e 00 74 08 4c 89 e7 e8 09 [ 166.285454][ C1] RSP: 0018:ffffc90000d0fc48 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 166.294988][ C1] RAX: 1ffff1100d869e01 RBX: ffff88806c34f008 RCX: 0000000000000000 [ 166.302944][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea000230fe00 [ 166.310906][ C1] RBP: ffffc90000d0fc80 R08: 000000000003a768 R09: ffffed1015019ea7 [ 166.318864][ C1] R10: ffffed1015019ea7 R11: 0000000000000000 R12: ffff88806c34f0a0 [ 166.326831][ C1] R13: dffffc0000000000 R14: 1ffff1100d869e14 R15: ffff8880a80cf528 [ 166.334811][ C1] ? free_thread_stack+0x12e/0x590 [ 166.339925][ C1] put_task_stack+0xa3/0x130 [ 166.344500][ C1] finish_task_switch+0x3f1/0x550 [ 166.349517][ C1] __schedule+0x9a8/0xcc0 [ 166.353839][ C1] schedule+0x181/0x210 [ 166.357981][ C1] schedule_timeout+0x14f/0x240 [ 166.362814][ C1] ? run_local_timers+0x120/0x120 [ 166.367827][ C1] rcu_gp_kthread+0xed8/0x1770 [ 166.372585][ C1] kthread+0x332/0x350 [ 166.376650][ C1] ? rcu_report_qs_rsp+0x140/0x140 [ 166.381835][ C1] ? kthread_blkcg+0xe0/0xe0 [ 166.386412][ C1] ret_from_fork+0x24/0x30 [ 166.390826][ C1] rcu: rcu_preempt kthread starved for 10524 jiffies! g6189 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 166.401903][ C1] rcu: RCU grace-period kthread stack dump: [ 166.407775][ C1] rcu_preempt R running task 29104 10 2 0x80004008 [ 166.415657][ C1] Call Trace: [ 166.418923][ C1] [ 166.421763][ C1] sched_show_task+0x40f/0x560 [ 166.426517][ C1] rcu_check_gp_kthread_starvation+0x170/0x1b0 [ 166.432658][ C1] rcu_sched_clock_irq+0x17d3/0x1ad0 [ 166.438117][ C1] update_process_times+0x12d/0x180 [ 166.443312][ C1] tick_sched_timer+0x263/0x420 [ 166.448147][ C1] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 166.453680][ C1] __hrtimer_run_queues+0x403/0x840 [ 166.458892][ C1] hrtimer_interrupt+0x38c/0xda0 [ 166.463830][ C1] ? debug_smp_processor_id+0x9/0x20 [ 166.469106][ C1] smp_apic_timer_interrupt+0x109/0x280 [ 166.474651][ C1] apic_timer_interrupt+0xf/0x20 [ 166.479568][ C1] [ 166.482508][ C1] RIP: 0010:free_thread_stack+0x15e/0x590 [ 166.488217][ C1] Code: 08 4c 89 e7 e8 43 a4 69 00 49 8b 1c 24 48 83 c3 08 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 25 a4 69 00 48 8b 3b fc ff ff ff e8 28 04 00 00 43 80 3c 2e 00 74 08 4c 89 e7 e8 09 [ 166.507821][ C1] RSP: 0018:ffffc90000d0fc48 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 166.516243][ C1] RAX: 1ffff1100d869e01 RBX: ffff88806c34f008 RCX: 0000000000000000 [ 166.524209][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea000230fe00 [ 166.532169][ C1] RBP: ffffc90000d0fc80 R08: 000000000003a768 R09: ffffed1015019ea7 [ 166.540148][ C1] R10: ffffed1015019ea7 R11: 0000000000000000 R12: ffff88806c34f0a0 [ 166.548108][ C1] R13: dffffc0000000000 R14: 1ffff1100d869e14 R15: ffff8880a80cf528 [ 166.556093][ C1] ? free_thread_stack+0x12e/0x590 [ 166.561192][ C1] put_task_stack+0xa3/0x130 [ 166.565769][ C1] finish_task_switch+0x3f1/0x550 [ 166.570783][ C1] __schedule+0x9a8/0xcc0 [ 166.575108][ C1] schedule+0x181/0x210 [ 166.579266][ C1] schedule_timeout+0x14f/0x240 [ 166.584133][ C1] ? run_local_timers+0x120/0x120 [ 166.589156][ C1] rcu_gp_kthread+0xed8/0x1770 [ 166.593928][ C1] kthread+0x332/0x350 [ 166.597981][ C1] ? rcu_report_qs_rsp+0x140/0x140 [ 166.603076][ C1] ? kthread_blkcg+0xe0/0xe0 [ 166.607684][ C1] ret_from_fork+0x24/0x30