[ 13.966626] audit: type=1800 audit(1557678660.112:28): pid=5450 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 13.988504] audit: type=1800 audit(1557678660.142:29): pid=5450 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 33.647983] ------------[ cut here ]------------ [ 33.652779] kernel BUG at mm/vmstat.c:1420! [ 33.657085] invalid opcode: 0000 [#1] PREEMPT SMP [ 33.662402] Modules linked in: [ 33.665694] CPU: 1 PID: 779 Comm: kworker/1:1 Not tainted 4.4.179 #4 [ 33.672164] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.681647] Workqueue: vmstat vmstat_update [ 33.686140] task: ffff88012b0b0040 ti: ffff8800bb0a8000 task.ti: ffff8800bb0a8000 [ 33.693740] RIP: 0010:[] [] vmstat_update+0x8c/0xc0 [ 33.702083] RSP: 0018:ffff8800bb0abd70 EFLAGS: 00010293 [ 33.707636] RAX: 0000000000000001 RBX: ffff8800bbb9ed00 RCX: 0000000000000000 [ 33.714891] RDX: 0000000000000000 RSI: ffffffff82f4c9aa RDI: ffffffff82f072b2 [ 33.722137] RBP: ffff8800bb0abd90 R08: 0000000000000000 R09: 0000000000000003 [ 33.729386] R10: 0000000000000001 R11: 0000000000000000 R12: ffff88012c116880 [ 33.736637] R13: ffffe8ffffd0a400 R14: ffff88012c110de0 R15: ffffffff83435678 [ 33.743886] FS: 0000000000000000(0000) GS:ffff88012c100000(0000) knlGS:0000000000000000 [ 33.752087] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.757951] CR2: 00000000007d0b40 CR3: 00000000b1895000 CR4: 00000000001406f0 [ 33.765209] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.772515] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.779925] Stack: [ 33.782050] ffff8800bbb9ed00 ffff88012c116880 ffffe8ffffd0a400 ffff88012c110de0 [ 33.790153] ffff8800bb0abe00 ffffffff8119286d ffffffff811927d4 ffff88012c1168e0 [ 33.798154] 0000000000000000 ffffffff8430fed0 ffffffff83da5000 0000000000000000 [ 33.806155] Call Trace: [ 33.808722] [] process_one_work+0x23d/0x800 [ 33.814665] [] ? process_one_work+0x1a4/0x800 [ 33.820795] [] worker_thread+0x49/0x460 [ 33.826446] [] ? process_one_work+0x800/0x800 [ 33.832585] [] kthread+0xe5/0x100 [ 33.837673] [] ? kthread_create_on_node+0x210/0x210 [ 33.844326] [] ret_from_fork+0x55/0x80 [ 33.849978] [] ? kthread_create_on_node+0x210/0x210 [ 33.856680] Code: 41 5c 41 5d 41 5e 5d c3 e8 f2 be 62 00 83 f8 3f 77 1b 89 c0 f0 48 0f ab 05 aa 1b 07 03 72 0c 48 83 c4 08 41 5c 41 5d 41 5e 5d c3 <0f> 0b 80 3d 2e 7f 16 02 00 75 dc be 75 00 00 00 48 c7 c7 2f e8 [ 33.884326] RIP [] vmstat_update+0x8c/0xc0 [ 33.890314] RSP [ 33.893982] ---[ end trace f761c0bce95c9be6 ]--- [ 33.898740] Kernel panic - not syncing: Fatal exception [ 33.905287] Kernel Offset: disabled [ 33.908900] Rebooting in 86400 seconds..