[....] Starting enhanced syslogd: rsyslogd[ 13.367349] audit: type=1400 audit(1516053198.881:5): 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 20.587066] audit: type=1400 audit(1516053206.100:6): avc: denied { map } for pid=3644 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 '10.128.0.29' (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 [ 37.371826] audit: type=1400 audit(1516053222.885:7): avc: denied { map } for pid=3661 comm="syzkaller092127" path="/root/syzkaller092127048" 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 [ 37.815145] kasan: CONFIG_KASAN_INLINE enabled [ 37.819817] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 37.827206] general protection fault: 0000 [#1] SMP KASAN [ 37.832721] Dumping ftrace buffer: [ 37.836242] (ftrace buffer empty) [ 37.839923] Modules linked in: [ 37.843091] CPU: 0 PID: 3730 Comm: syzkaller092127 Not tainted 4.15.0-rc8+ #263 [ 37.850514] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.859852] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 37.864931] RSP: 0018:ffff8801d97cfaf0 EFLAGS: 00010202 [ 37.870269] RAX: dffffc0000000000 RBX: ffff8801bb2beec0 RCX: ffffffff85024060 [ 37.877518] RDX: 0000000000000045 RSI: 00000000ba00ebd8 RDI: 0000000000000228 [ 37.884770] RBP: ffff8801d97cfd70 R08: 1ffff1003b2f9e9f R09: 0000000000000002 [ 37.892012] R10: ffff8801d97cf9c0 R11: 0000000000000000 R12: ffff8801bb324940 [ 37.899271] R13: ffff8801d97cfd48 R14: 0000000000000000 R15: ffff8801d97cfc28 [ 37.906529] FS: 0000000001a86880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 37.914746] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.920597] CR2: 00000000205fafd2 CR3: 00000001bb619006 CR4: 00000000001606f0 [ 37.927850] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.935096] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.942685] Call Trace: [ 37.945258] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 37.950424] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 37.955771] ? selinux_socket_connect+0x311/0x730 [ 37.960588] ? lock_downgrade+0x980/0x980 [ 37.964716] ? lock_downgrade+0x980/0x980 [ 37.968846] ? selinux_socket_setsockopt+0x80/0x80 [ 37.973748] ? lock_release+0xa40/0xa40 [ 37.977702] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 37.983576] ? __check_object_size+0x25d/0x4f0 [ 37.988133] ? handle_mm_fault+0x410/0x8d0 [ 37.992355] ? __might_sleep+0x95/0x190 [ 37.996318] ? security_socket_connect+0x89/0xb0 [ 38.001053] SYSC_connect+0x213/0x4a0 [ 38.004836] ? SYSC_bind+0x410/0x410 [ 38.008537] ? do_page_fault+0xee/0x720 [ 38.012483] ? __do_page_fault+0xc90/0xc90 [ 38.016689] ? sock_map_fd+0x53/0x90 [ 38.020380] ? SyS_socket+0x12d/0x1d0 [ 38.024153] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 38.028969] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 38.033960] SyS_connect+0x24/0x30 [ 38.037475] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 38.042204] RIP: 0033:0x4413e9 [ 38.045374] RSP: 002b:00007ffd7827ea78 EFLAGS: 00000207 ORIG_RAX: 000000000000002a [ 38.053051] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 00000000004413e9 [ 38.060294] RDX: 000000000000002e RSI: 00000000205fafd2 RDI: 0000000000000004 [ 38.067537] RBP: 00000000000093b0 R08: 0000000000000000 R09: 0000000000000000 [ 38.074791] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000000000 [ 38.082046] R13: 0000000000000044 R14: 0000000000000000 R15: 0000000000000000 [ 38.089306] Code: fe ff ff e8 60 d7 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 [ 38.108470] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801d97cfaf0 [ 38.115103] ---[ end trace decb342794c33c6d ]--- [ 38.119872] Kernel panic - not syncing: Fatal exception [ 38.125629] Dumping ftrace buffer: [ 38.129154] (ftrace buffer empty) [ 38.132839] Kernel Offset: disabled [ 38.136440] Rebooting in 86400 seconds..