[....] 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. [ 38.394060] audit: type=1800 audit(1569285964.929:33): pid=7374 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 [ 38.418964] audit: type=1800 audit(1569285964.929:34): pid=7374 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 40.974235] audit: type=1400 audit(1569285967.509:35): avc: denied { map } for pid=7548 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 '10.128.0.38' (ECDSA) to the list of known hosts. executing program [ 47.436680] audit: type=1400 audit(1569285973.969:36): avc: denied { map } for pid=7560 comm="syz-executor009" path="/root/syz-executor009143052" 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 [ 47.470052] kasan: CONFIG_KASAN_INLINE enabled [ 47.474701] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 47.482302] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 47.488661] CPU: 0 PID: 7558 Comm: sshd Not tainted 4.19.75 #0 [ 47.494614] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.503959] RIP: 0010:wait_consider_task+0x140b/0x3910 [ 47.509217] 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 [ 47.528115] RSP: 0018:ffff88808a40faa0 EFLAGS: 00010203 [ 47.533470] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff813fd453 [ 47.540717] RDX: 0000000000000002 RSI: ffffffff813fd486 RDI: 0000000000000014 [ 47.547993] RBP: ffff88808a40fbc8 R08: ffff888092d3e4c0 R09: ffffed1015d04733 [ 47.555242] R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 0000000000001d88 [ 47.562504] R13: ffff88808a40fcbc R14: ffff8880905a4280 R15: ffff88808a40fcb8 [ 47.569846] FS: 00007f1bb54a97c0(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 47.578053] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.583915] CR2: 00007ffc615d3e30 CR3: 00000000957f4000 CR4: 00000000001406f0 [ 47.591167] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 47.598417] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 47.605664] Call Trace: [ 47.608239] ? mark_held_locks+0x100/0x100 [ 47.612456] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 47.617537] ? add_wait_queue+0x112/0x170 [ 47.621668] ? release_task+0x1630/0x1630 [ 47.625802] ? lock_acquire+0x16f/0x3f0 [ 47.629759] ? do_wait+0x3aa/0x9d0 [ 47.633280] ? kasan_check_write+0x14/0x20 [ 47.637505] do_wait+0x439/0x9d0 [ 47.640854] ? wait_consider_task+0x3910/0x3910 [ 47.645499] ? mark_held_locks+0x100/0x100 [ 47.649725] kernel_wait4+0x171/0x290 [ 47.653506] ? __ia32_sys_waitid+0x140/0x140 [ 47.657902] ? task_stopped_code+0x180/0x180 [ 47.662293] __do_sys_wait4+0x147/0x160 [ 47.666247] ? kernel_wait4+0x290/0x290 [ 47.670203] ? kasan_check_read+0x11/0x20 [ 47.674332] ? _copy_to_user+0xc9/0x120 [ 47.678287] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 47.683802] ? __x64_sys_rt_sigprocmask+0x21d/0x2e0 [ 47.688800] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 47.693537] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 47.698272] ? do_syscall_64+0x26/0x620 [ 47.702229] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.707572] ? do_syscall_64+0x26/0x620 [ 47.711542] __x64_sys_wait4+0x97/0xf0 [ 47.715420] do_syscall_64+0xfd/0x620 [ 47.719228] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.724411] RIP: 0033:0x7f1bb381fa3e [ 47.728112] 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 [ 47.746996] RSP: 002b:00007ffc615d8770 EFLAGS: 00000246 ORIG_RAX: 000000000000003d [ 47.754685] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1bb381fa3e [ 47.761936] RDX: 0000000000000001 RSI: 00007ffc615d87ac RDI: ffffffffffffffff [ 47.769187] RBP: 00005636fbdb3c88 R08: 00007ffc615d8870 R09: 0101010101010101 [ 47.776435] R10: 0000000000000000 R11: 0000000000000246 R12: 00005636fc3edaf0 [ 47.783684] R13: 00005636fbdb1fb4 R14: 0000000000000028 R15: 00005636fbdb3ca0 [ 47.790944] Modules linked in: [ 47.794190] ---[ end trace 90b028a62f863373 ]--- [ 47.798973] RIP: 0010:wait_consider_task+0x140b/0x3910 [ 47.804234] 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 [ 47.823150] RSP: 0018:ffff88808a40faa0 EFLAGS: 00010203 [ 47.828550] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff813fd453 [ 47.835801] RDX: 0000000000000002 RSI: ffffffff813fd486 RDI: 0000000000000014 [ 47.843080] RBP: ffff88808a40fbc8 R08: ffff888092d3e4c0 R09: ffffed1015d04733 [ 47.850536] R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 0000000000001d88 [ 47.857821] R13: ffff88808a40fcbc R14: ffff8880905a4280 R15: ffff88808a40fcb8 [ 47.865084] FS: 00007f1bb54a97c0(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 47.873321] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.879216] CR2: 00007ffc615d3e30 CR3: 00000000957f4000 CR4: 00000000001406f0 [ 47.886500] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 47.893763] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 47.901051] Kernel panic - not syncing: Fatal exception [ 47.907852] Kernel Offset: disabled [ 47.911477] Rebooting in 86400 seconds..