[....] Starting enhanced syslogd: rsyslogd[ 16.175136] audit: type=1400 audit(1518023529.519:5): 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 OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.779403] audit: type=1400 audit(1518023532.123:6): avc: denied { map } for pid=4148 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 '10.128.0.8' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 41.081636] audit: type=1400 audit(1518023554.425:7): avc: denied { map } for pid=4165 comm="syzkaller375836" path="/root/syzkaller375836512" 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 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 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 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 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 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 42.135055] kasan: CONFIG_KASAN_INLINE enabled [ 42.139818] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 42.147364] general protection fault: 0000 [#1] SMP KASAN [ 42.152880] Dumping ftrace buffer: [ 42.156396] (ftrace buffer empty) [ 42.160077] Modules linked in: [ 42.163241] CPU: 0 PID: 4605 Comm: syzkaller375836 Not tainted 4.15.0+ #301 [ 42.170307] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.179638] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 42.184707] RSP: 0018:ffff8801b01a79a8 EFLAGS: 00010202 [ 42.190039] RAX: dffffc0000000000 RBX: ffff8801b0102ac0 RCX: ffffffff851ac470 [ 42.197280] RDX: 0000000000000045 RSI: 00000000a600c4f1 RDI: 0000000000000228 [ 42.204516] RBP: ffff8801b01a7c28 R08: 1ffff10036034e77 R09: 0000000000000002 [ 42.211755] R10: ffff8801b01a7878 R11: 0000000000000000 R12: ffff8801b1c4d200 [ 42.218992] R13: ffff8801b01a7c00 R14: 0000000000000000 R15: ffff8801b01a7ae0 [ 42.226230] FS: 00007fd88ba5c700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 42.234423] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.240271] CR2: 00000000205fafd2 CR3: 00000001b3f7d003 CR4: 00000000001606f0 [ 42.247510] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.254747] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.261992] Call Trace: [ 42.264554] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 42.269716] ? selinux_netlbl_socket_connect+0x18/0x1b0 [ 42.275047] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 42.280381] ? selinux_socket_connect+0x311/0x730 [ 42.285195] ? lock_downgrade+0x980/0x980 [ 42.289313] ? selinux_socket_setsockopt+0x80/0x80 [ 42.294210] ? lock_release+0xa40/0xa40 [ 42.298153] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 42.304009] ? __check_object_size+0x8b/0x530 [ 42.308475] ? __might_sleep+0x95/0x190 [ 42.312424] ? security_socket_connect+0x89/0xb0 [ 42.317150] SYSC_connect+0x213/0x4a0 [ 42.320920] ? SYSC_bind+0x410/0x410 [ 42.324607] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 42.329159] ? vmacache_find+0x5f/0x280 [ 42.333100] ? vmacache_update+0xfe/0x130 [ 42.337224] ? mm_fault_error+0x2c0/0x2c0 [ 42.341341] ? move_addr_to_kernel+0x60/0x60 [ 42.345718] ? do_raw_spin_trylock+0x190/0x190 [ 42.350270] SyS_connect+0x24/0x30 [ 42.353783] ? SyS_accept+0x30/0x30 [ 42.357380] do_syscall_64+0x282/0x940 [ 42.361236] ? __do_page_fault+0xc90/0xc90 [ 42.365438] ? mmdrop+0x18/0x30 [ 42.368685] ? finish_task_switch+0x29b/0x890 [ 42.373151] ? syscall_return_slowpath+0x550/0x550 [ 42.378059] ? syscall_return_slowpath+0x2ac/0x550 [ 42.382957] ? prepare_exit_to_usermode+0x350/0x350 [ 42.387942] ? retint_user+0x18/0x18 [ 42.391628] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.396442] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 42.401601] RIP: 0033:0x446189 [ 42.404764] RSP: 002b:00007fd88ba5bdb8 EFLAGS: 00000297 ORIG_RAX: 000000000000002a [ 42.412439] RAX: ffffffffffffffda RBX: 00000000006debe4 RCX: 0000000000446189 [ 42.419682] RDX: 000000000000002e RSI: 00000000205fafd2 RDI: 0000000000000004 [ 42.426920] RBP: 00000000006debe0 R08: 0000000000000000 R09: 0000000000000000 [ 42.434158] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000000 [ 42.441397] R13: 00007ffd3c79ddef R14: 00007fd88ba5c9c0 R15: 0000000000000005 [ 42.448643] Code: fe ff ff e8 00 e7 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 [ 42.467711] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801b01a79a8 [ 42.474796] ---[ end trace ffeda3a80edab0c8 ]--- [ 42.479542] Kernel panic - not syncing: Fatal exception [ 42.485263] Dumping ftrace buffer: [ 42.488789] (ftrace buffer empty) [ 42.492471] Kernel Offset: disabled [ 42.496069] Rebooting in 86400 seconds..