[....] Starting enhanced syslogd: rsyslogd[ 15.981734] audit: type=1400 audit(1519309603.995:5): avc: denied { syslog } for pid=4008 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: [ 18.800819] audit: type=1400 audit(1519309606.814:6): avc: denied { map } for pid=4146 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 '10.128.0.46' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 31.682309] audit: type=1400 audit(1519309619.696:7): avc: denied { map } for pid=4163 comm="syzkaller236602" path="/root/syzkaller236602600" 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 executing program executing program executing program [ 31.796161] kasan: CONFIG_KASAN_INLINE enabled [ 31.800891] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 31.808287] general protection fault: 0000 [#1] SMP KASAN [ 31.813799] Dumping ftrace buffer: [ 31.817312] (ftrace buffer empty) [ 31.820992] Modules linked in: [ 31.824160] CPU: 1 PID: 4184 Comm: syzkaller236602 Not tainted 4.16.0-rc2+ #323 [ 31.831583] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.840932] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 31.846020] RSP: 0018:ffff8801d2b479a8 EFLAGS: 00010202 [ 31.851363] RAX: dffffc0000000000 RBX: ffff8801b1b36e00 RCX: ffffffff851b65c0 [ 31.858604] RDX: 0000000000000045 RSI: 0000000019ee5aa2 RDI: 0000000000000228 [ 31.865847] RBP: ffff8801d2b47c28 R08: 1ffff1003a568e77 R09: 0000000000000002 [ 31.873089] R10: ffff8801d2b47878 R11: 0000000000000000 R12: ffff8801b1b3bb40 [ 31.880333] R13: ffff8801d2b47c00 R14: 0000000000000000 R15: ffff8801d2b47ae0 [ 31.887579] FS: 00007f9fcbf9d700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 31.895777] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 31.901634] CR2: 0000000020348fd2 CR3: 00000001b27bb003 CR4: 00000000001606e0 [ 31.908884] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.916125] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.923368] Call Trace: [ 31.925945] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 31.931119] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 31.936461] ? selinux_socket_connect+0x311/0x730 [ 31.941288] ? lock_downgrade+0x980/0x980 [ 31.945408] ? selinux_socket_setsockopt+0x80/0x80 [ 31.950307] ? lock_release+0xa40/0xa40 [ 31.954251] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 31.960109] ? __check_object_size+0x8b/0x530 [ 31.964590] ? __might_sleep+0x95/0x190 [ 31.968546] ? security_socket_connect+0x89/0xb0 [ 31.973280] SYSC_connect+0x213/0x4a0 [ 31.977052] ? SYSC_bind+0x410/0x410 [ 31.980738] ? find_held_lock+0x35/0x1d0 [ 31.984778] ? lock_release+0xa40/0xa40 [ 31.988723] ? do_raw_spin_trylock+0x190/0x190 [ 31.993277] ? SyS_accept+0x30/0x30 [ 31.996875] SyS_connect+0x24/0x30 [ 32.000388] do_syscall_64+0x280/0x940 [ 32.004243] ? mmdrop+0x18/0x30 [ 32.007492] ? finish_task_switch+0x279/0x860 [ 32.011957] ? syscall_return_slowpath+0x550/0x550 [ 32.016857] ? syscall_return_slowpath+0x2ac/0x550 [ 32.021755] ? prepare_exit_to_usermode+0x350/0x350 [ 32.026749] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 32.032085] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.036905] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 32.042065] RIP: 0033:0x4468f9 [ 32.045227] RSP: 002b:00007f9fcbf9cdb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 32.052906] RAX: ffffffffffffffda RBX: 00000000006e29dc RCX: 00000000004468f9 [ 32.060147] RDX: 000000000000002e RSI: 0000000020348fd2 RDI: 0000000000000006 [ 32.067387] RBP: 00000000006e29d8 R08: 00007f9fcbf9d700 R09: 0000000000000000 [ 32.074626] R10: 00007f9fcbf9d700 R11: 0000000000000246 R12: 0000000000000000 [ 32.081865] R13: 00007ffc4231b37f R14: 00007f9fcbf9d9c0 R15: 0000000000000003 [ 32.089113] Code: fe ff ff e8 10 a6 55 fc 4c 89 fa 49 8d be 28 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 c6 04 02 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 df 09 00 00 4c 89 fa 48 b8 00 00 00 00 00 fc [ 32.108185] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801d2b479a8 [ 32.114792] ---[ end trace 7ea75cdffba180a5 ]--- [ 32.119533] Kernel panic - not syncing: Fatal exception [ 32.125285] Dumping ftrace buffer: [ 32.128810] (ftrace buffer empty) [ 32.132498] Kernel Offset: disabled [ 32.136100] Rebooting in 86400 seconds..