[....] Starting enhanced syslogd: rsyslogd[ 17.276522] audit: type=1400 audit(1517422770.688:5): avc: denied { syslog } for pid=4018 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: [ 22.272933] audit: type=1400 audit(1517422775.684:6): avc: denied { map } for pid=4157 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 '10.128.0.12' (ECDSA) to the list of known hosts. [ 28.569192] audit: type=1400 audit(1517422781.980:7): avc: denied { map } for pid=4170 comm="syzkaller474221" path="/root/syzkaller474221976" 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 [ 28.738068] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 32.911127] kasan: CONFIG_KASAN_INLINE enabled [ 32.915803] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 32.923210] general protection fault: 0000 [#1] SMP KASAN [ 32.928728] Dumping ftrace buffer: [ 32.932245] (ftrace buffer empty) [ 32.935923] Modules linked in: [ 32.939099] CPU: 0 PID: 4927 Comm: syzkaller474221 Not tainted 4.15.0+ #288 [ 32.946165] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.955511] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 32.960590] RSP: 0018:ffff8801adedfaf0 EFLAGS: 00010202 [ 32.965925] RAX: dffffc0000000000 RBX: ffff8801adaae8c0 RCX: ffffffff85128a00 [ 32.973165] RDX: 0000000000000045 RSI: 0000000030b77256 RDI: 0000000000000228 [ 32.980407] RBP: ffff8801adedfd70 R08: 1ffff10035bdbe9f R09: 0000000000000002 [ 32.987659] R10: ffff8801adedf9c0 R11: 0000000000000000 R12: ffff8801ad98c040 [ 32.994908] R13: ffff8801adedfd48 R14: 0000000000000000 R15: ffff8801adedfc28 [ 33.002149] FS: 0000000000eea940(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 33.010344] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.016192] CR2: 00000000205fafd2 CR3: 00000001ada32004 CR4: 00000000001606f0 [ 33.023435] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.030675] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.037927] Call Trace: [ 33.040498] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 33.045668] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 33.051011] ? selinux_socket_connect+0x311/0x730 [ 33.055827] ? lock_downgrade+0x980/0x980 [ 33.059943] ? lock_downgrade+0x980/0x980 [ 33.064064] ? selinux_socket_setsockopt+0x80/0x80 [ 33.068974] ? lock_release+0xa40/0xa40 [ 33.072919] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 33.078778] ? __check_object_size+0x25d/0x4f0 [ 33.083335] ? handle_mm_fault+0x410/0x8d0 [ 33.087542] ? __might_sleep+0x95/0x190 [ 33.091495] ? security_socket_connect+0x89/0xb0 [ 33.096232] SYSC_connect+0x213/0x4a0 [ 33.100011] ? SYSC_bind+0x410/0x410 [ 33.103709] ? do_page_fault+0xee/0x720 [ 33.107658] ? __do_page_fault+0xc90/0xc90 [ 33.111885] ? sock_map_fd+0x53/0x90 [ 33.115571] ? SyS_socket+0x12d/0x1d0 [ 33.119355] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 33.124170] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 33.129172] SyS_connect+0x24/0x30 [ 33.132684] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 33.137409] RIP: 0033:0x441749 [ 33.140569] RSP: 002b:00007fffa80e11d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 33.148254] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441749 [ 33.155495] RDX: 000000000000002e RSI: 00000000205fafd2 RDI: 0000000000000004 [ 33.162738] RBP: 0000000000000000 R08: 00000000000002f2 R09: 00000000000002f2 [ 33.169978] R10: 00000000000002f2 R11: 0000000000000246 R12: 0000000000008088 [ 33.177219] R13: 00000000006ce720 R14: 00000000004a2fa2 R15: 00000000006cf050 [ 33.184467] 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 [ 33.203545] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801adedfaf0 [ 33.210164] ---[ end trace 79bc6ccc7ab915e6 ]--- [ 33.214923] Kernel panic - not syncing: Fatal exception [ 33.220755] Dumping ftrace buffer: [ 33.224269] (ftrace buffer empty) [ 33.227954] Kernel Offset: disabled [ 33.231567] Rebooting in 86400 seconds..