[....] Starting enhanced syslogd: rsyslogd[ 12.986467] audit: type=1400 audit(1516358737.226:5): avc: denied { syslog } for pid=3504 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 file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.228780] audit: type=1400 audit(1516358743.468:6): avc: denied { map } for pid=3645 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 '10.128.0.51' (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 [ 49.260106] audit: type=1400 audit(1516358773.499:7): avc: denied { map } for pid=3662 comm="syzkaller777164" path="/root/syzkaller777164743" 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 [ 49.766130] kasan: CONFIG_KASAN_INLINE enabled [ 49.770863] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 49.778487] general protection fault: 0000 [#1] SMP KASAN [ 49.783999] Dumping ftrace buffer: [ 49.787507] (ftrace buffer empty) [ 49.791190] Modules linked in: [ 49.794357] CPU: 0 PID: 3850 Comm: syzkaller777164 Not tainted 4.15.0-rc8+ #268 [ 49.801772] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.811119] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 49.816190] RSP: 0018:ffff8801bbb5faf0 EFLAGS: 00010202 [ 49.821522] RAX: dffffc0000000000 RBX: ffff8801d9335100 RCX: ffffffff850258e0 [ 49.828761] RDX: 0000000000000045 RSI: 00000000ba00ebd8 RDI: 0000000000000228 [ 49.836001] RBP: ffff8801bbb5fd70 R08: 1ffff1003776be9f R09: 0000000000000002 [ 49.843241] R10: ffff8801bbb5f9c0 R11: 0000000000000000 R12: ffff8801bbbd8480 [ 49.850496] R13: ffff8801bbb5fd48 R14: 0000000000000000 R15: ffff8801bbb5fc28 [ 49.857738] FS: 0000000001ad6940(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 49.865934] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.871788] CR2: 0000000020e71000 CR3: 00000001d9793002 CR4: 00000000001606f0 [ 49.879031] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 49.886287] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 49.893964] Call Trace: [ 49.896534] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 49.901697] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 49.907033] ? selinux_socket_connect+0x311/0x730 [ 49.911848] ? lock_downgrade+0x980/0x980 [ 49.915965] ? lock_downgrade+0x980/0x980 [ 49.920084] ? selinux_socket_setsockopt+0x80/0x80 [ 49.924983] ? lock_release+0xa40/0xa40 [ 49.928932] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 49.934786] ? __check_object_size+0x25d/0x4f0 [ 49.939343] ? handle_mm_fault+0x410/0x8d0 [ 49.943549] ? __might_sleep+0x95/0x190 [ 49.947497] ? security_socket_connect+0x89/0xb0 [ 49.952225] SYSC_connect+0x213/0x4a0 [ 49.955998] ? SYSC_bind+0x410/0x410 [ 49.959684] ? do_page_fault+0xee/0x720 [ 49.963629] ? __do_page_fault+0xc90/0xc90 [ 49.967838] ? sock_map_fd+0x53/0x90 [ 49.971521] ? SyS_socket+0x12d/0x1d0 [ 49.975296] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 49.980111] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 49.985100] SyS_connect+0x24/0x30 [ 49.988613] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 49.993341] RIP: 0033:0x4414d9 [ 49.996502] RSP: 002b:00007fff1e42c558 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 50.004177] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004414d9 [ 50.011417] RDX: 0000000000000032 RSI: 0000000020e71000 RDI: 0000000000000004 [ 50.018658] RBP: 000000000000c263 R08: 0000000000000000 R09: 000000000000c263 [ 50.025900] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 50.033140] R13: 00000000004029d0 R14: 0000000000000000 R15: 0000000000000000 [ 50.040388] Code: fe ff ff e8 b0 d1 6d 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 [ 50.059457] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801bbb5faf0 [ 50.066091] ---[ end trace dd2643a0313d3f5a ]--- [ 50.070840] Kernel panic - not syncing: Fatal exception [ 50.076213] Dumping ftrace buffer: [ 50.079725] (ftrace buffer empty) [ 50.083410] Kernel Offset: disabled [ 50.087011] Rebooting in 86400 seconds..