[....] 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. [ 37.524461] audit: type=1800 audit(1569325721.333:33): pid=7336 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 [ 37.546334] audit: type=1800 audit(1569325721.343:34): pid=7336 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: [ 41.133100] audit: type=1400 audit(1569325724.943:35): avc: denied { map } for pid=7512 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 '10.128.0.116' (ECDSA) to the list of known hosts. executing program [ 47.587748] audit: type=1400 audit(1569325731.403:36): avc: denied { map } for pid=7524 comm="syz-executor366" path="/root/syz-executor366051379" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 47.618190] kasan: CONFIG_KASAN_INLINE enabled [ 47.622893] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 47.630520] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 47.636755] CPU: 1 PID: 7522 Comm: sshd Not tainted 4.19.75 #0 [ 47.642707] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.652052] RIP: 0010:wait_consider_task+0x140b/0x3910 [ 47.657329] 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 [ 47.676220] RSP: 0018:ffff88809f1bfaa0 EFLAGS: 00010203 [ 47.681571] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff813fd453 [ 47.688823] RDX: 0000000000000002 RSI: ffffffff813fd486 RDI: 0000000000000014 [ 47.696074] RBP: ffff88809f1bfbc8 R08: ffff88809d5466c0 R09: ffffed1015d24733 [ 47.703326] R10: ffffed1015d24732 R11: ffff8880ae923993 R12: 0000000000001d64 [ 47.710592] R13: ffff88809f1bfcbc R14: ffff8880a097a640 R15: ffff88809f1bfcb8 [ 47.717858] FS: 00007f9ce31967c0(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 47.726065] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.731926] CR2: 00007ffd4c5eeff0 CR3: 00000000a8364000 CR4: 00000000001406e0 [ 47.739188] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 47.746440] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 47.753687] Call Trace: [ 47.756281] ? mark_held_locks+0x100/0x100 [ 47.760507] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 47.765597] ? add_wait_queue+0x112/0x170 [ 47.769727] ? release_task+0x1630/0x1630 [ 47.773853] ? lock_acquire+0x16f/0x3f0 [ 47.777817] ? do_wait+0x3aa/0x9d0 [ 47.781342] ? kasan_check_write+0x14/0x20 [ 47.785570] do_wait+0x439/0x9d0 [ 47.788924] ? wait_consider_task+0x3910/0x3910 [ 47.793573] ? mark_held_locks+0x100/0x100 [ 47.797790] kernel_wait4+0x171/0x290 [ 47.801573] ? __ia32_sys_waitid+0x140/0x140 [ 47.805962] ? task_stopped_code+0x180/0x180 [ 47.810356] __do_sys_wait4+0x147/0x160 [ 47.814311] ? kernel_wait4+0x290/0x290 [ 47.818267] ? kasan_check_read+0x11/0x20 [ 47.822395] ? _copy_to_user+0xc9/0x120 [ 47.826354] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 47.831884] ? __x64_sys_rt_sigprocmask+0x21d/0x2e0 [ 47.836894] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 47.841629] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 47.846374] ? do_syscall_64+0x26/0x620 [ 47.850331] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.855685] ? do_syscall_64+0x26/0x620 [ 47.859651] __x64_sys_wait4+0x97/0xf0 [ 47.863526] do_syscall_64+0xfd/0x620 [ 47.867326] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.872497] RIP: 0033:0x7f9ce150ca3e [ 47.876195] 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 [ 47.895085] RSP: 002b:00007ffd4c5f3930 EFLAGS: 00000246 ORIG_RAX: 000000000000003d [ 47.902789] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9ce150ca3e [ 47.910055] RDX: 0000000000000001 RSI: 00007ffd4c5f396c RDI: ffffffffffffffff [ 47.917314] RBP: 000055b3bf567c88 R08: 00007ffd4c5f3a30 R09: 0101010101010101 [ 47.924571] R10: 0000000000000000 R11: 0000000000000246 R12: 000055b3c141bc00 [ 47.931823] R13: 000055b3bf565fb4 R14: 0000000000000028 R15: 000055b3bf567ca0 [ 47.939861] Modules linked in: [ 47.943109] ---[ end trace e00b950baacf6084 ]--- [ 47.947893] RIP: 0010:wait_consider_task+0x140b/0x3910 [ 47.953153] 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 [ 47.972084] RSP: 0018:ffff88809f1bfaa0 EFLAGS: 00010203 [ 47.977462] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff813fd453 [ 47.984754] RDX: 0000000000000002 RSI: ffffffff813fd486 RDI: 0000000000000014 [ 47.992024] RBP: ffff88809f1bfbc8 R08: ffff88809d5466c0 R09: ffffed1015d24733 [ 47.999322] R10: ffffed1015d24732 R11: ffff8880ae923993 R12: 0000000000001d64 [ 48.006603] R13: ffff88809f1bfcbc R14: ffff8880a097a640 R15: ffff88809f1bfcb8 [ 48.013857] FS: 00007f9ce31967c0(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 48.022100] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.027991] CR2: 00007ffd4c5eeff0 CR3: 00000000a8364000 CR4: 00000000001406e0 [ 48.035278] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.042539] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.049833] Kernel panic - not syncing: Fatal exception [ 48.056504] Kernel Offset: disabled [ 48.060136] Rebooting in 86400 seconds..