[....] Starting enhanced syslogd: rsyslogd[ 17.796346] audit: type=1400 audit(1517229291.019:5): avc: denied { syslog } for pid=4011 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: [ 22.427462] audit: type=1400 audit(1517229295.650:6): 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 '10.128.0.19' (ECDSA) to the list of known hosts. executing program executing program [ 28.800786] audit: type=1400 audit(1517229302.023:7): avc: denied { map } for pid=4167 comm="syzkaller190112" path="/root/syzkaller190112029" 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 [ 28.832164] kasan: CONFIG_KASAN_INLINE enabled [ 28.836816] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 28.844208] general protection fault: 0000 [#1] SMP KASAN [ 28.849744] Dumping ftrace buffer: [ 28.854219] (ftrace buffer empty) [ 28.857908] Modules linked in: [ 28.861165] CPU: 0 PID: 4169 Comm: syzkaller190112 Not tainted 4.15.0+ #285 [ 28.868251] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.877591] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 28.882660] RSP: 0018:ffff8801b5ed7af0 EFLAGS: 00010202 [ 28.887996] RAX: dffffc0000000000 RBX: ffff8801b5b54640 RCX: ffffffff85115570 [ 28.895236] RDX: 0000000000000045 RSI: 00000000cc48a6dc RDI: 0000000000000228 [ 28.902476] RBP: ffff8801b5ed7d70 R08: 1ffff10036bdae9f R09: 0000000000000002 [ 28.909718] R10: ffff8801b5ed79c0 R11: 0000000000000000 R12: ffff8801b5ce8900 [ 28.916959] R13: ffff8801b5ed7d48 R14: 0000000000000000 R15: ffff8801b5ed7c28 [ 28.924210] FS: 000000000139b880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 28.932419] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.938273] CR2: 0000000020e71000 CR3: 00000001b65fc005 CR4: 00000000001606f0 [ 28.945530] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.952775] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.960026] Call Trace: [ 28.962604] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 28.967781] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 28.973123] ? selinux_socket_connect+0x311/0x730 [ 28.977941] ? lock_downgrade+0x980/0x980 [ 28.982070] ? lock_downgrade+0x980/0x980 [ 28.986203] ? selinux_socket_setsockopt+0x80/0x80 [ 28.991106] ? lock_release+0xa40/0xa40 [ 28.995054] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 29.000918] ? __check_object_size+0x25d/0x4f0 [ 29.005483] ? handle_mm_fault+0x410/0x8d0 [ 29.009694] ? __might_sleep+0x95/0x190 [ 29.013647] ? security_socket_connect+0x89/0xb0 [ 29.018392] SYSC_connect+0x213/0x4a0 [ 29.022167] ? SYSC_bind+0x410/0x410 [ 29.025857] ? do_page_fault+0xee/0x720 [ 29.029810] ? __do_page_fault+0xc90/0xc90 [ 29.034023] ? sockfd_lookup_light+0x104/0x150 [ 29.038579] ? sock_map_fd+0x53/0x90 [ 29.042265] ? SyS_socket+0x12d/0x1d0 [ 29.046037] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 29.050852] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.055844] SyS_connect+0x24/0x30 [ 29.059359] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 29.064088] RIP: 0033:0x440ca9 [ 29.067248] RSP: 002b:00007fff2123fd28 EFLAGS: 00000207 ORIG_RAX: 000000000000002a [ 29.074943] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440ca9 [ 29.082195] RDX: 0000000000000032 RSI: 0000000020e71000 RDI: 0000000000000004 [ 29.089444] RBP: 0000000000007083 R08: 0000000000000000 R09: 0000000000000000 [ 29.096691] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000000000 [ 29.103934] R13: 0000000000000003 R14: 00000000006cf050 R15: 00000000004a264e [ 29.111189] Code: fe ff ff e8 90 d6 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 [ 29.130275] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801b5ed7af0 [ 29.136886] ---[ end trace 871fae449b4b8657 ]--- [ 29.141649] Kernel panic - not syncing: Fatal exception [ 29.147410] Dumping ftrace buffer: [ 29.150922] (ftrace buffer empty) [ 29.154604] Kernel Offset: disabled [ 29.158204] Rebooting in 86400 seconds..