[....] Starting enhanced syslogd: rsyslogd[ 15.664657] audit: type=1400 audit(1517360485.844:5): avc: denied { syslog } for pid=3838 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 18.626648] audit: type=1400 audit(1517360488.806:6): avc: denied { map } for pid=3978 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 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 [ 24.960278] audit: type=1400 audit(1517360495.140:7): avc: denied { map } for pid=3993 comm="syzkaller164662" path="/root/syzkaller164662673" 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 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 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 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 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 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 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 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 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 [ 28.291369] kasan: CONFIG_KASAN_INLINE enabled [ 28.296201] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 28.303615] general protection fault: 0000 [#1] SMP KASAN [ 28.309144] Dumping ftrace buffer: [ 28.312669] (ftrace buffer empty) [ 28.316373] Modules linked in: [ 28.319555] CPU: 0 PID: 5203 Comm: syzkaller164662 Not tainted 4.15.0+ #287 [ 28.326640] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.335992] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 28.341079] RSP: 0018:ffff8801c5b4faf0 EFLAGS: 00010202 [ 28.346429] RAX: dffffc0000000000 RBX: ffff8801c5b2ae80 RCX: ffffffff85125700 [ 28.353689] RDX: 0000000000000045 RSI: 00000000da049997 RDI: 0000000000000228 [ 28.360946] RBP: ffff8801c5b4fd70 R08: 1ffff10038b69e9f R09: 0000000000000002 [ 28.368202] R10: ffff8801c5b4f9c0 R11: 0000000000000000 R12: ffff8801c5bf24c0 [ 28.375459] R13: ffff8801c5b4fd48 R14: 0000000000000000 R15: ffff8801c5b4fc28 [ 28.382718] FS: 0000000000a41880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 28.390932] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.396808] CR2: 00000000205fafd2 CR3: 00000001c5a7b005 CR4: 00000000001606f0 [ 28.404070] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.411327] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.418583] Call Trace: [ 28.421177] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 28.426369] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 28.431731] ? selinux_socket_connect+0x311/0x730 [ 28.436569] ? lock_downgrade+0x980/0x980 [ 28.440690] ? lock_downgrade+0x980/0x980 [ 28.444814] ? selinux_socket_setsockopt+0x80/0x80 [ 28.449715] ? lock_release+0xa40/0xa40 [ 28.453668] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 28.459534] ? __check_object_size+0x25d/0x4f0 [ 28.464091] ? handle_mm_fault+0x410/0x8d0 [ 28.468301] ? __might_sleep+0x95/0x190 [ 28.472266] ? security_socket_connect+0x89/0xb0 [ 28.477007] SYSC_connect+0x213/0x4a0 [ 28.480786] ? SYSC_bind+0x410/0x410 [ 28.484484] ? do_page_fault+0xee/0x720 [ 28.489342] ? __do_page_fault+0xc90/0xc90 [ 28.493553] ? sock_map_fd+0x53/0x90 [ 28.497326] ? SyS_socket+0x12d/0x1d0 [ 28.501104] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 28.505925] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.510919] SyS_connect+0x24/0x30 [ 28.514454] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 28.519189] RIP: 0033:0x440cc9 [ 28.522349] RSP: 002b:00007ffc8aa47798 EFLAGS: 00000206 ORIG_RAX: 000000000000002a [ 28.530032] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440cc9 [ 28.537276] RDX: 000000000000002e RSI: 00000000205fafd2 RDI: 0000000000000004 [ 28.544610] RBP: 0000000000006e5a R08: 0000000000000000 R09: 0000000000000000 [ 28.551851] R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 [ 28.559101] R13: 0000000000000003 R14: 00000000006cf050 R15: 00000000004a260e [ 28.566368] 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 [ 28.585483] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801c5b4faf0 [ 28.592085] ---[ end trace b06fa3612586ec0e ]--- [ 28.596840] Kernel panic - not syncing: Fatal exception [ 28.602598] Dumping ftrace buffer: [ 28.606112] (ftrace buffer empty) [ 28.609793] Kernel Offset: disabled [ 28.613398] Rebooting in 86400 seconds..