[ 39.757871][ T26] audit: type=1800 audit(1556004898.834:25): pid=7735 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 39.793914][ T26] audit: type=1800 audit(1556004898.834:26): pid=7735 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 39.820194][ T26] audit: type=1800 audit(1556004898.844:27): pid=7735 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 39.843207][ T26] audit: type=1800 audit(1556004898.844:28): pid=7735 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.22' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 423.614440][ T26] kauditd_printk_skb: 2 callbacks suppressed [ 423.614451][ T26] audit: type=1804 audit(1556005282.684:31): pid=7885 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor131" name="/root/bus" dev="sda1" ino=2339 res=1 [ 423.781507][ C1] hrtimer: interrupt took 24547 ns [ 555.224663][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 555.231508][ C1] rcu: 1-....: (13152 ticks this GP) idle=45e/1/0x4000000000000002 softirq=10484/10486 fqs=5248 [ 555.242224][ C1] rcu: (t=10500 jiffies g=5281 q=5) [ 555.247586][ C1] NMI backtrace for cpu 1 [ 555.251898][ C1] CPU: 1 PID: 7885 Comm: syz-executor131 Not tainted 5.1.0-rc6 #79 [ 555.259862][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 555.269958][ C1] Call Trace: [ 555.273224][ C1] [ 555.276173][ C1] dump_stack+0x172/0x1f0 [ 555.280495][ C1] nmi_cpu_backtrace.cold+0x63/0xa4 [ 555.285712][ C1] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 555.291389][ C1] nmi_trigger_cpumask_backtrace+0x1be/0x236 [ 555.297360][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 555.303363][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 555.308495][ C1] ? find_next_bit+0x107/0x130 [ 555.313244][ C1] rcu_sched_clock_irq.cold+0x500/0xa4a [ 555.318785][ C1] ? raise_softirq+0x11f/0x310 [ 555.323673][ C1] update_process_times+0x32/0x80 [ 555.328707][ C1] tick_sched_handle+0xa2/0x190 [ 555.333540][ C1] tick_sched_timer+0x47/0x130 [ 555.338290][ C1] __hrtimer_run_queues+0x33e/0xde0 [ 555.343476][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 555.348839][ C1] ? hrtimer_start_range_ns+0xc80/0xc80 [ 555.354407][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 555.360114][ C1] ? ktime_get_update_offsets_now+0x2d9/0x440 [ 555.366167][ C1] hrtimer_interrupt+0x314/0x770 [ 555.371145][ C1] smp_apic_timer_interrupt+0x120/0x570 [ 555.376688][ C1] apic_timer_interrupt+0xf/0x20 [ 555.381603][ C1] [ 555.384585][ C1] RIP: 0010:lock_acquire+0x1ea/0x3f0 [ 555.389857][ C1] Code: 7c 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 c7 01 00 00 48 83 3d 42 ff 3a 07 00 0f 84 3b 01 00 00 48 8b 7d c8 57 9d <0f> 1f 44 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 65 8b [ 555.409445][ C1] RSP: 0018:ffff8880989975c8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 555.417901][ C1] RAX: 1ffffffff11252ee RBX: ffff8880a5788000 RCX: 0000000000000000 [ 555.425858][ C1] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000286 [ 555.433802][ C1] RBP: ffff888098997610 R08: 0000000021515f99 R09: ffffffff895e6714 [ 555.441750][ C1] R10: ffff8880a57888a8 R11: ffff8880a5788000 R12: ffffffff889a5bc0 [ 555.449707][ C1] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000002 [ 555.457744][ C1] find_get_entry+0xe7/0x880 [ 555.462312][ C1] ? find_get_entries_tag+0xc10/0xc10 [ 555.467832][ C1] ? trace_hardirqs_on_caller+0x6a/0x220 [ 555.473452][ C1] ? find_get_entries_tag+0xc10/0xc10 [ 555.478822][ C1] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 555.484275][ C1] ? retint_kernel+0x2d/0x2d [ 555.488840][ C1] pagecache_get_page+0x4c/0x740 [ 555.493863][ C1] generic_file_read_iter+0x716/0x2870 [ 555.499305][ C1] ? retint_kernel+0x2d/0x2d [ 555.503884][ C1] ? filemap_write_and_wait_range+0xd0/0xd0 [ 555.509754][ C1] ? retint_kernel+0x2d/0x2d [ 555.514373][ C1] ? iter_file_splice_write+0x594/0xbe0 [ 555.519908][ C1] ? iter_file_splice_write+0x59e/0xbe0 [ 555.525447][ C1] ? iter_file_splice_write+0x5cd/0xbe0 [ 555.531042][ C1] ? iter_file_splice_write+0x59e/0xbe0 [ 555.536632][ C1] ? atime_needs_update+0x5f0/0x5f0 [ 555.541848][ C1] ext4_file_read_iter+0x180/0x3c0 [ 555.546943][ C1] generic_file_splice_read+0x4b4/0x800 [ 555.552473][ C1] ? add_to_pipe+0x350/0x350 [ 555.557061][ C1] ? rw_verify_area+0x118/0x360 [ 555.561913][ C1] ? add_to_pipe+0x350/0x350 [ 555.566595][ C1] do_splice_to+0x12a/0x190 [ 555.571077][ C1] splice_direct_to_actor+0x2d2/0x970 [ 555.576423][ C1] ? generic_pipe_buf_nosteal+0x10/0x10 [ 555.582011][ C1] ? do_splice_to+0x190/0x190 [ 555.586679][ C1] ? rw_verify_area+0x118/0x360 [ 555.591518][ C1] do_splice_direct+0x1da/0x2a0 [ 555.596339][ C1] ? splice_direct_to_actor+0x970/0x970 [ 555.601858][ C1] ? rcu_read_lock_sched_held+0x110/0x130 [ 555.607659][ C1] ? rcu_sync_lockdep_assert+0x73/0xb0 [ 555.613142][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 555.619360][ C1] ? __sb_start_write+0x1ac/0x360 [ 555.624491][ C1] do_sendfile+0x597/0xd00 [ 555.628895][ C1] ? do_compat_pwritev64+0x1c0/0x1c0 [ 555.634154][ C1] ? do_sys_open+0x31d/0x5d0 [ 555.638766][ C1] __x64_sys_sendfile64+0x1dd/0x220 [ 555.643945][ C1] ? __ia32_sys_sendfile+0x230/0x230 [ 555.649210][ C1] ? do_syscall_64+0x26/0x610 [ 555.653863][ C1] ? lockdep_hardirqs_on+0x418/0x5d0 [ 555.659122][ C1] ? trace_hardirqs_on+0x67/0x230 [ 555.664177][ C1] do_syscall_64+0x103/0x610 [ 555.668758][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 555.674625][ C1] RIP: 0033:0x440339 [ 555.678497][ C1] 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 555.698179][ C1] RSP: 002b:00007ffd353bfc48 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 555.706569][ C1] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440339 [ 555.714518][ C1] RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000003 [ 555.722464][ C1] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 555.730409][ C1] R10: 00008000fffffffe R11: 0000000000000246 R12: 0000000000401bc0 [ 555.738356][ C1] R13: 0000000000401c50 R14: 0000000000000000 R15: 0000000000000000