[....] Starting enhanced syslogd: rsyslogd[ 17.059151] audit: type=1400 audit(1517365004.697:5): avc: denied { syslog } for pid=4012 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: [ 22.952407] audit: type=1400 audit(1517365010.590:6): avc: denied { map } for pid=4152 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 '10.128.0.53' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 29.276147] audit: type=1400 audit(1517365016.913:7): avc: denied { map } for pid=4166 comm="syzkaller484700" path="/root/syzkaller484700406" 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 29.496131] kasan: CONFIG_KASAN_INLINE enabled [ 29.500782] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 29.508169] general protection fault: 0000 [#1] SMP KASAN [ 29.513689] Dumping ftrace buffer: [ 29.517201] (ftrace buffer empty) [ 29.520884] Modules linked in: [ 29.524055] CPU: 0 PID: 4168 Comm: syzkaller484700 Not tainted 4.15.0+ #287 [ 29.531132] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.540468] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 29.545538] RSP: 0018:ffff8801b2127af0 EFLAGS: 00010202 [ 29.550873] RAX: dffffc0000000000 RBX: ffff8801b21d3240 RCX: ffffffff85125700 [ 29.558113] RDX: 0000000000000045 RSI: 000000009a68db2a RDI: 0000000000000228 [ 29.565354] RBP: ffff8801b2127d70 R08: 1ffff10036424e9f R09: 0000000000000002 [ 29.572597] R10: ffff8801b21279c0 R11: 0000000000000000 R12: ffff8801b2442480 [ 29.579837] R13: ffff8801b2127d48 R14: 0000000000000000 R15: ffff8801b2127c28 [ 29.587082] FS: 00007fc46d152700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 29.595280] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.601131] CR2: 0000000020e71000 CR3: 00000001b2fa3001 CR4: 00000000001606f0 [ 29.608373] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.615616] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.622856] Call Trace: [ 29.625423] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 29.630588] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 29.635927] ? selinux_socket_connect+0x311/0x730 [ 29.640747] ? lock_downgrade+0x980/0x980 [ 29.644871] ? selinux_socket_setsockopt+0x80/0x80 [ 29.649774] ? lock_release+0xa40/0xa40 [ 29.653719] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 29.659576] ? __check_object_size+0x25d/0x4f0 [ 29.664132] ? handle_mm_fault+0x410/0x8d0 [ 29.668342] ? __might_sleep+0x95/0x190 [ 29.672294] ? security_socket_connect+0x89/0xb0 [ 29.677025] SYSC_connect+0x213/0x4a0 [ 29.680799] ? SYSC_bind+0x410/0x410 [ 29.684488] ? do_page_fault+0xee/0x720 [ 29.688435] ? __do_page_fault+0xc90/0xc90 [ 29.692652] ? do_futex+0x22a0/0x22a0 [ 29.696422] ? SyS_socket+0x12d/0x1d0 [ 29.700196] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 29.705013] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.710007] SyS_connect+0x24/0x30 [ 29.713524] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 29.718250] RIP: 0033:0x445689 [ 29.721413] RSP: 002b:00007fc46d151db8 EFLAGS: 00000293 ORIG_RAX: 000000000000002a [ 29.729094] RAX: ffffffffffffffda RBX: 00000000006dac3c RCX: 0000000000445689 [ 29.736335] RDX: 0000000000000032 RSI: 0000000020e71000 RDI: 000000000000007a [ 29.743577] RBP: 00000000006dac38 R08: 0000000000000000 R09: 0000000000000000 [ 29.750820] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 [ 29.758062] R13: 00007ffcadf3e07f R14: 00007fc46d1529c0 R15: 0000000000000007 [ 29.765312] Code: fe ff ff e8 00 13 5e 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 e5 09 00 00 4c 89 fa 48 b8 00 00 00 00 00 fc [ 29.784408] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801b2127af0 [ 29.791048] ---[ end trace 212e4c1a0d8758dc ]--- [ 29.795808] Kernel panic - not syncing: Fatal exception [ 29.801596] Dumping ftrace buffer: [ 29.805114] (ftrace buffer empty) [ 29.808796] Kernel Offset: disabled [ 29.812397] Rebooting in 86400 seconds..