[....] Starting enhanced syslogd: rsyslogd[ 15.800676] audit: type=1400 audit(1520126377.815:5): avc: denied { syslog } for pid=4017 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 18.217965] audit: type=1400 audit(1520126380.232:6): avc: denied { map } for pid=4155 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 '10.128.0.50' (ECDSA) to the list of known hosts. executing program [ 34.095444] audit: type=1400 audit(1520126396.110:7): avc: denied { map } for pid=4172 comm="syzkaller493181" path="/root/syzkaller493181885" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 39.391186] kasan: CONFIG_KASAN_INLINE enabled [ 39.395928] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 39.403335] general protection fault: 0000 [#1] SMP KASAN [ 39.408853] Dumping ftrace buffer: [ 39.412368] (ftrace buffer empty) [ 39.416053] Modules linked in: [ 39.419222] CPU: 1 PID: 4172 Comm: syzkaller493181 Not tainted 4.16.0-rc3+ #338 [ 39.426650] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.435984] RIP: 0010:kernel_sock_shutdown+0x29/0x70 [ 39.441054] RSP: 0018:ffff8801bd2e7cc8 EFLAGS: 00010206 [ 39.446386] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff845fb6f4 [ 39.453636] RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000028 [ 39.460879] RBP: ffff8801bd2e7ce0 R08: 0000000000000000 R09: 1ffff10037a5cf15 [ 39.468120] R10: ffff8801bd2e7870 R11: 0000000000000001 R12: ffff8801b609f7d2 [ 39.475359] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801bd2e7d58 [ 39.482603] FS: 0000000000b12880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 39.490798] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.496651] CR2: 0000000001cd6100 CR3: 00000001bdad3006 CR4: 00000000001606e0 [ 39.503893] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.511134] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.518373] Call Trace: [ 39.520943] smc_shutdown+0x3ed/0x540 [ 39.524717] SyS_shutdown+0x137/0x290 [ 39.528488] ? SyS_getsockopt+0x340/0x340 [ 39.532611] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 39.538118] ? do_syscall_64+0xb7/0x940 [ 39.542064] ? SyS_getsockopt+0x340/0x340 [ 39.546181] do_syscall_64+0x281/0x940 [ 39.550045] ? __do_page_fault+0xc90/0xc90 [ 39.554249] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 39.558974] ? syscall_return_slowpath+0x550/0x550 [ 39.563874] ? syscall_return_slowpath+0x2ac/0x550 [ 39.568774] ? prepare_exit_to_usermode+0x350/0x350 [ 39.573769] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 39.579106] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.583931] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 39.589095] RIP: 0033:0x43fce9 [ 39.592256] RSP: 002b:00007ffd868a9358 EFLAGS: 00000217 ORIG_RAX: 0000000000000030 [ 39.599930] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fce9 [ 39.607169] RDX: 000000000043fce9 RSI: 0000000000000000 RDI: 0000000000000003 [ 39.614406] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 39.621645] R10: 00000000004002c8 R11: 0000000000000217 R12: 0000000000401610 [ 39.628884] R13: 00000000004016a0 R14: 0000000000000000 R15: 0000000000000000 [ 39.636130] Code: 66 90 55 48 89 e5 41 55 41 54 53 48 89 fb 41 89 f5 e8 4c 3d 11 fd 48 8d 7b 28 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 32 4c 8b 63 28 48 b8 00 00 00 00 00 fc ff df 49 [ 39.655205] RIP: kernel_sock_shutdown+0x29/0x70 RSP: ffff8801bd2e7cc8 [ 39.661832] ---[ end trace a18ca60f8fe56895 ]--- [ 39.666572] Kernel panic - not syncing: Fatal exception [ 39.672241] Dumping ftrace buffer: [ 39.675759] (ftrace buffer empty) [ 39.679444] Kernel Offset: disabled [ 39.683062] Rebooting in 86400 seconds..