[....] Starting enhanced syslogd: rsyslogd[ 12.733006] audit: type=1400 audit(1517135583.044:5): avc: denied { syslog } for pid=3522 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: [ 20.964397] audit: type=1400 audit(1517135591.276:6): avc: denied { map } for pid=3662 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 '10.128.0.20' (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 [ 27.257775] audit: type=1400 audit(1517135597.569:7): avc: denied { map } for pid=3676 comm="syzkaller052103" path="/root/syzkaller052103830" 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 [ 31.603152] kasan: CONFIG_KASAN_INLINE enabled [ 31.607792] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 31.615167] general protection fault: 0000 [#1] SMP KASAN [ 31.620707] Dumping ftrace buffer: [ 31.624219] (ftrace buffer empty) [ 31.627902] Modules linked in: [ 31.631071] CPU: 0 PID: 4369 Comm: syzkaller052103 Not tainted 4.15.0-rc9+ #283 [ 31.638488] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.647819] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 31.652892] RSP: 0018:ffff8801bb23faf0 EFLAGS: 00010202 [ 31.658226] RAX: dffffc0000000000 RBX: ffff8801bb251340 RCX: ffffffff85115570 [ 31.665470] RDX: 0000000000000045 RSI: 000000007a5bf5da RDI: 0000000000000228 [ 31.672722] RBP: ffff8801bb23fd70 R08: 1ffff10037647e9f R09: 0000000000000002 [ 31.679965] R10: ffff8801bb23f9c0 R11: 0000000000000000 R12: ffff8801d53236c0 [ 31.687206] R13: ffff8801bb23fd48 R14: 0000000000000000 R15: ffff8801bb23fc28 [ 31.694452] FS: 0000000000f5c880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 31.702649] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 31.708513] CR2: 00000000205fafd2 CR3: 00000001d4e8e005 CR4: 00000000001606f0 [ 31.715761] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.723011] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.730273] Call Trace: [ 31.732840] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 31.738005] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 31.743350] ? selinux_socket_connect+0x311/0x730 [ 31.748175] ? lock_downgrade+0x980/0x980 [ 31.752294] ? lock_downgrade+0x980/0x980 [ 31.756414] ? selinux_socket_setsockopt+0x80/0x80 [ 31.761314] ? lock_release+0xa40/0xa40 [ 31.765263] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 31.771122] ? __check_object_size+0x25d/0x4f0 [ 31.775676] ? handle_mm_fault+0x410/0x8d0 [ 31.779885] ? __might_sleep+0x95/0x190 [ 31.783837] ? security_socket_connect+0x89/0xb0 [ 31.788568] SYSC_connect+0x213/0x4a0 [ 31.792341] ? SYSC_bind+0x410/0x410 [ 31.796032] ? do_page_fault+0xee/0x720 [ 31.799978] ? __do_page_fault+0xc90/0xc90 [ 31.804187] ? sock_map_fd+0x53/0x90 [ 31.807871] ? SyS_socket+0x12d/0x1d0 [ 31.811653] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 31.816473] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.821469] SyS_connect+0x24/0x30 [ 31.824981] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 31.829717] RIP: 0033:0x440bc9 [ 31.832878] RSP: 002b:00007ffd56641ea8 EFLAGS: 00000207 ORIG_RAX: 000000000000002a [ 31.840564] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440bc9 [ 31.847806] RDX: 000000000000002e RSI: 00000000205fafd2 RDI: 0000000000000004 [ 31.855049] RBP: 0000000000007b6d R08: 0000000000000000 R09: 0000000000000000 [ 31.862291] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000000000 [ 31.869535] R13: 0000000000000003 R14: 00000000006ce050 R15: 00000000004a256e [ 31.876785] Code: fe ff ff e8 00 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 [ 31.895860] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801bb23faf0 [ 31.902641] ---[ end trace e110a1b0e357ca89 ]--- [ 31.907403] Kernel panic - not syncing: Fatal exception [ 31.913129] Dumping ftrace buffer: [ 31.916653] (ftrace buffer empty) [ 31.920336] Kernel Offset: disabled [ 31.923932] Rebooting in 86400 seconds..