[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [ 40.548458] audit: type=1800 audit(1569522976.718:33): pid=7478 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=2465 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 45.172226] kauditd_printk_skb: 1 callbacks suppressed [ 45.172239] audit: type=1400 audit(1569522981.338:35): avc: denied { map } for pid=7652 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 '10.128.0.178' (ECDSA) to the list of known hosts. executing program [ 51.740778] audit: type=1400 audit(1569522987.908:36): avc: denied { map } for pid=7664 comm="syz-executor946" path="/root/syz-executor946996289" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 51.781531] kasan: CONFIG_KASAN_INLINE enabled [ 51.786304] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 51.793696] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 51.799916] CPU: 1 PID: 7662 Comm: sshd Not tainted 4.19.75 #0 [ 51.805885] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.815244] RIP: 0010:wait_consider_task+0x140b/0x3910 [ 51.820612] Code: e0 74 49 87 c6 05 0a fc f7 07 01 e8 d6 f5 12 00 e8 fa 8d 2b 00 48 8d 7b 14 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 [ 51.839498] RSP: 0018:ffff8880a5327aa0 EFLAGS: 00010203 [ 51.844843] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff813fd453 [ 51.852113] RDX: 0000000000000002 RSI: ffffffff813fd486 RDI: 0000000000000014 [ 51.859370] RBP: ffff8880a5327bc8 R08: ffff88808e886640 R09: ffffed1015d24733 [ 51.866625] R10: ffffed1015d24732 R11: ffff8880ae923993 R12: 0000000000001df0 [ 51.873877] R13: ffff8880a5327cbc R14: ffff8880900ec6c0 R15: ffff8880a5327cb8 [ 51.881135] FS: 00007f6f820717c0(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 51.889367] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 51.895254] CR2: 00007ffd483a0ec0 CR3: 000000009c237000 CR4: 00000000001406e0 [ 51.902545] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 51.909836] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 51.917091] Call Trace: [ 51.919677] ? mark_held_locks+0x100/0x100 [ 51.923899] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 51.929003] ? add_wait_queue+0x112/0x170 [ 51.933146] ? release_task+0x1630/0x1630 [ 51.937443] ? lock_acquire+0x16f/0x3f0 [ 51.941429] ? do_wait+0x3aa/0x9d0 [ 51.944963] ? kasan_check_write+0x14/0x20 [ 51.949190] do_wait+0x439/0x9d0 [ 51.952556] ? wait_consider_task+0x3910/0x3910 [ 51.957211] ? mark_held_locks+0x100/0x100 [ 51.961430] kernel_wait4+0x171/0x290 [ 51.965214] ? __ia32_sys_waitid+0x140/0x140 [ 51.969620] ? task_stopped_code+0x180/0x180 [ 51.974014] __do_sys_wait4+0x147/0x160 [ 51.977982] ? kernel_wait4+0x290/0x290 [ 51.981942] ? kasan_check_read+0x11/0x20 [ 51.986090] ? _copy_to_user+0xc9/0x120 [ 51.990242] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 51.995801] ? __x64_sys_rt_sigprocmask+0x21d/0x2e0 [ 52.000814] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 52.005578] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 52.010330] ? do_syscall_64+0x26/0x620 [ 52.014294] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 52.019760] ? do_syscall_64+0x26/0x620 [ 52.023722] __x64_sys_wait4+0x97/0xf0 [ 52.027597] do_syscall_64+0xfd/0x620 [ 52.031412] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 52.036598] RIP: 0033:0x7f6f803e7a3e [ 52.040298] Code: 90 90 90 90 90 90 90 90 90 90 90 90 48 83 ec 28 8b 05 c2 eb 2d 00 85 c0 75 1d 45 31 d2 48 63 d2 48 63 ff b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 48 83 c4 28 c3 89 54 24 08 48 89 74 24 10 [ 52.059188] RSP: 002b:00007ffd483a5800 EFLAGS: 00000246 ORIG_RAX: 000000000000003d [ 52.066879] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6f803e7a3e [ 52.074250] RDX: 0000000000000001 RSI: 00007ffd483a583c RDI: ffffffffffffffff [ 52.081642] RBP: 000055ad8f628c88 R08: 00007ffd483a5900 R09: 0101010101010101 [ 52.088951] R10: 0000000000000000 R11: 0000000000000246 R12: 000055ad91005c00 [ 52.096206] R13: 000055ad8f626fb4 R14: 0000000000000028 R15: 000055ad8f628ca0 [ 52.103464] Modules linked in: [ 52.106770] ---[ end trace fc2ff60289c9710c ]--- [ 52.111558] RIP: 0010:wait_consider_task+0x140b/0x3910 [ 52.116865] Code: e0 74 49 87 c6 05 0a fc f7 07 01 e8 d6 f5 12 00 e8 fa 8d 2b 00 48 8d 7b 14 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 [ 52.135804] RSP: 0018:ffff8880a5327aa0 EFLAGS: 00010203 [ 52.141164] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff813fd453 [ 52.148446] RDX: 0000000000000002 RSI: ffffffff813fd486 RDI: 0000000000000014 [ 52.155710] RBP: ffff8880a5327bc8 R08: ffff88808e886640 R09: ffffed1015d24733 [ 52.163016] R10: ffffed1015d24732 R11: ffff8880ae923993 R12: 0000000000001df0 [ 52.170305] R13: ffff8880a5327cbc R14: ffff8880900ec6c0 R15: ffff8880a5327cb8 [ 52.177606] FS: 00007f6f820717c0(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 52.185877] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.191745] CR2: 00007ffd483a0ec0 CR3: 000000009c237000 CR4: 00000000001406e0 [ 52.199049] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 52.206335] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 52.213612] Kernel panic - not syncing: Fatal exception [ 52.220529] Kernel Offset: disabled [ 52.224169] Rebooting in 86400 seconds..