[ 41.052569][ T26] audit: type=1800 audit(1556004925.922:26): pid=7615 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 41.077719][ T26] audit: type=1800 audit(1556004925.922:27): pid=7615 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 41.103148][ T26] audit: type=1800 audit(1556004925.922:28): pid=7615 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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. [ 42.179542][ T26] audit: type=1800 audit(1556004927.092:29): pid=7615 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 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.62' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 438.132318][ T26] kauditd_printk_skb: 1 callbacks suppressed [ 438.132335][ T26] audit: type=1804 audit(1556005323.042:31): pid=7767 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor474" name="/root/bus" dev="sda1" ino=2339 res=1 [ 438.132466][ C1] hrtimer: interrupt took 34510 ns [ 728.984363][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 728.991906][ C1] rcu: 1-....: (29078 ticks this GP) idle=73e/1/0x4000000000000002 softirq=8399/8401 fqs=5247 [ 729.003137][ C1] (t=10500 jiffies g=5813 q=2) [ 729.008176][ C1] NMI backtrace for cpu 1 [ 729.012662][ C1] CPU: 1 PID: 7767 Comm: syz-executor474 Not tainted 5.1.0-rc5-next-20190418 #28 [ 729.022142][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 729.032800][ C1] Call Trace: [ 729.036079][ C1] [ 729.039072][ C1] dump_stack+0x172/0x1f0 [ 729.043482][ C1] nmi_cpu_backtrace.cold+0x63/0xa4 [ 729.049017][ C1] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 729.054644][ C1] nmi_trigger_cpumask_backtrace+0x1be/0x236 [ 729.060619][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 729.066638][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 729.071913][ C1] ? find_next_bit+0x107/0x130 [ 729.076751][ C1] rcu_sched_clock_irq.cold+0x4d1/0xbfd [ 729.082336][ C1] ? raise_softirq+0x11f/0x310 [ 729.087101][ C1] update_process_times+0x32/0x80 [ 729.092254][ C1] tick_sched_handle+0xa2/0x190 [ 729.097100][ C1] tick_sched_timer+0x47/0x130 [ 729.101908][ C1] __hrtimer_run_queues+0x33e/0xde0 [ 729.107271][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 729.112709][ C1] ? hrtimer_start_range_ns+0xc80/0xc80 [ 729.118373][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 729.124234][ C1] ? ktime_get_update_offsets_now+0x2d9/0x440 [ 729.130518][ C1] hrtimer_interrupt+0x314/0x770 [ 729.135501][ C1] smp_apic_timer_interrupt+0x120/0x570 [ 729.141047][ C1] apic_timer_interrupt+0xf/0x20 [ 729.147267][ C1] [ 729.150205][ C1] RIP: 0010:ktime_get_coarse_real_ts64+0x11e/0x2b0 [ 729.157156][ C1] Code: 6b 92 88 48 c1 e8 03 42 80 3c 30 00 0f 85 7a 01 00 00 48 83 3d 72 44 30 07 00 0f 84 0d 01 00 00 e8 47 9f 0e 00 4c 89 ef 57 9d <0f> 1f 44 00 00 e8 38 9f 0e 00 44 8b 2d 21 e9 38 07 31 ff 44 89 ee [ 729.177038][ C1] RSP: 0018:ffff888086fcf5f0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 [ 729.185861][ C1] RAX: ffff8880943d20c0 RBX: ffff888086fcf658 RCX: 1ffff1101287a52c [ 729.194198][ C1] RDX: 0000000000000000 RSI: ffffffff81622749 RDI: 0000000000000293 [ 729.202369][ C1] RBP: ffff888086fcf628 R08: ffff8880943d20c0 R09: ffff8880943d2960 [ 729.210433][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: fffffbfff1124d75 [ 729.218390][ C1] R13: 0000000000000293 R14: dffffc0000000000 R15: 1ffffffff1124d77 [ 729.226585][ C1] ? ktime_get_coarse_real_ts64+0x119/0x2b0 [ 729.232611][ C1] current_time+0x6b/0x140 [ 729.237391][ C1] ? timespec64_trunc+0x180/0x180 [ 729.242672][ C1] ? find_get_pages_contig+0xa00/0xa00 [ 729.248127][ C1] atime_needs_update+0x299/0x5f0 [ 729.253142][ C1] touch_atime+0xce/0x2a0 [ 729.257455][ C1] ? atime_needs_update+0x5f0/0x5f0 [ 729.262909][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 729.269409][ C1] ? pagecache_get_page+0x1a8/0x740 [ 729.274599][ C1] generic_file_read_iter+0x204f/0x2870 [ 729.280216][ C1] ? lock_downgrade+0x880/0x880 [ 729.285070][ C1] ? filemap_write_and_wait_range+0xd0/0xd0 [ 729.291187][ C1] ? aa_file_perm+0x432/0xeb0 [ 729.295858][ C1] ? aa_path_link+0x460/0x460 [ 729.300524][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 729.307110][ C1] ? pipe_unlock+0x57/0x80 [ 729.311750][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 729.318031][ C1] ? iter_file_splice_write+0x59e/0xbe0 [ 729.323884][ C1] ? atime_needs_update+0x5f0/0x5f0 [ 729.329408][ C1] ext4_file_read_iter+0x180/0x3c0 [ 729.335347][ C1] generic_file_splice_read+0x4b4/0x800 [ 729.341208][ C1] ? add_to_pipe+0x350/0x350 [ 729.345842][ C1] ? rw_verify_area+0x118/0x360 [ 729.350686][ C1] ? add_to_pipe+0x350/0x350 [ 729.356709][ C1] do_splice_to+0x12a/0x190 [ 729.361300][ C1] splice_direct_to_actor+0x2d2/0x970 [ 729.366714][ C1] ? generic_pipe_buf_nosteal+0x10/0x10 [ 729.372493][ C1] ? do_splice_to+0x190/0x190 [ 729.377247][ C1] ? rw_verify_area+0x118/0x360 [ 729.382314][ C1] do_splice_direct+0x1da/0x2a0 [ 729.387332][ C1] ? splice_direct_to_actor+0x970/0x970 [ 729.392985][ C1] ? do_splice_direct+0x1f/0x2a0 [ 729.398038][ C1] do_sendfile+0x597/0xd00 [ 729.402630][ C1] ? do_compat_pwritev64+0x1c0/0x1c0 [ 729.407912][ C1] __x64_sys_sendfile64+0x1dd/0x220 [ 729.413456][ C1] ? __ia32_sys_sendfile+0x230/0x230 [ 729.419691][ C1] ? __ia32_sys_sendfile+0x230/0x230 [ 729.426384][ C1] ? do_syscall_64+0xb5/0x670 [ 729.431095][ C1] do_syscall_64+0x103/0x670 [ 729.435788][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 729.441787][ C1] RIP: 0033:0x440339 [ 729.446143][ 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 [ 729.466464][ C1] RSP: 002b:00007ffc26f54a88 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 729.474952][ C1] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440339 [ 729.483009][ C1] RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000003 [ 729.491214][ C1] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 729.499885][ C1] R10: 00008000fffffffe R11: 0000000000000246 R12: 0000000000401bc0 [ 729.508027][ C1] R13: 0000000000401c50 R14: 0000000000000000 R15: 0000000000000000