[....] Starting enhanced syslogd: rsyslogd[ 16.467307] audit: type=1400 audit(1517441518.183:5): avc: denied { syslog } for pid=4007 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: [ 22.080321] audit: type=1400 audit(1517441523.795:6): avc: denied { map } for pid=4146 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 '10.128.0.48' (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 [ 28.369557] audit: type=1400 audit(1517441530.085:7): avc: denied { map } for pid=4160 comm="syzkaller888631" path="/root/syzkaller888631495" 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 [ 29.444138] kasan: CONFIG_KASAN_INLINE enabled [ 29.448787] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 29.456160] general protection fault: 0000 [#1] SMP KASAN [ 29.461681] Dumping ftrace buffer: [ 29.465190] (ftrace buffer empty) [ 29.468877] Modules linked in: [ 29.472044] CPU: 0 PID: 4319 Comm: syzkaller888631 Not tainted 4.15.0+ #288 [ 29.479111] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.488448] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 29.493526] RSP: 0018:ffff8801b04ffaf0 EFLAGS: 00010202 [ 29.498873] RAX: dffffc0000000000 RBX: ffff8801b0cf2180 RCX: ffffffff85128a00 [ 29.506113] RDX: 0000000000000045 RSI: 0000000005b31f5d RDI: 0000000000000228 [ 29.513353] RBP: ffff8801b04ffd70 R08: 1ffff1003609fe9f R09: 0000000000000002 [ 29.520591] R10: ffff8801b04ff9c0 R11: 0000000000000000 R12: ffff8801b065a040 [ 29.527829] R13: ffff8801b04ffd48 R14: 0000000000000000 R15: ffff8801b04ffc28 [ 29.535082] FS: 00000000026a3880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 29.543277] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.549131] CR2: 00000000205fafd2 CR3: 00000001b1f2a003 CR4: 00000000001606f0 [ 29.556383] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.563625] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.570864] Call Trace: [ 29.573432] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 29.578597] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 29.583935] ? selinux_socket_connect+0x311/0x730 [ 29.588749] ? lock_downgrade+0x980/0x980 [ 29.592874] ? lock_downgrade+0x980/0x980 [ 29.596995] ? selinux_socket_setsockopt+0x80/0x80 [ 29.601898] ? lock_release+0xa40/0xa40 [ 29.605842] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 29.611697] ? __check_object_size+0x25d/0x4f0 [ 29.616250] ? handle_mm_fault+0x410/0x8d0 [ 29.620457] ? __might_sleep+0x95/0x190 [ 29.624407] ? security_socket_connect+0x89/0xb0 [ 29.629135] SYSC_connect+0x213/0x4a0 [ 29.632907] ? SYSC_bind+0x410/0x410 [ 29.636593] ? do_page_fault+0xee/0x720 [ 29.640539] ? __do_page_fault+0xc90/0xc90 [ 29.644746] ? sock_map_fd+0x53/0x90 [ 29.648430] ? SyS_socket+0x12d/0x1d0 [ 29.652212] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 29.657032] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.662029] SyS_connect+0x24/0x30 [ 29.665542] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 29.670266] RIP: 0033:0x441739 [ 29.673428] RSP: 002b:00007ffc020ab4f8 EFLAGS: 00000207 ORIG_RAX: 000000000000002a [ 29.681106] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441739 [ 29.688345] RDX: 000000000000002e RSI: 00000000205fafd2 RDI: 0000000000000004 [ 29.695587] RBP: 00000000006cf720 R08: 0000000000000000 R09: 0000000000000000 [ 29.702835] R10: 0000000000000000 R11: 0000000000000207 R12: 00007ffc020ab520 [ 29.710077] R13: 0000000000000000 R14: 00000000006d00a8 R15: 000000000000009d [ 29.717334] Code: fe ff ff e8 c0 05 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 [ 29.736420] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801b04ffaf0 [ 29.743068] ---[ end trace dd620b54a0510bf1 ]--- [ 29.747832] Kernel panic - not syncing: Fatal exception [ 29.753216] Dumping ftrace buffer: [ 29.756732] (ftrace buffer empty) [ 29.760501] Kernel Offset: disabled [ 29.764100] Rebooting in 86400 seconds..