[....] Starting enhanced syslogd: rsyslogd[ 17.018827] audit: type=1400 audit(1519524470.805:5): avc: denied { syslog } for pid=4087 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 OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.999772] audit: type=1400 audit(1519524476.786:6): avc: denied { map } for pid=4226 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 '10.128.15.211' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 29.288059] audit: type=1400 audit(1519524483.074:7): avc: denied { map } for pid=4240 comm="syzkaller120227" path="/root/syzkaller120227315" 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 RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 29.728656] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 30.082068] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 30.088193] 8021q: adding VLAN 0 to HW filter on device bond0 executing program executing program executing program executing program [ 30.134448] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 30.173333] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready executing program executing program executing program executing program executing program executing program [ 30.206754] IPv6: veth1: IPv6 duplicate address fe80::a8aa:aaff:feaa:a used by aa:aa:aa:aa:00:0a detected! executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.879193] IPv6: veth0: IPv6 duplicate address fe80::a used by aa:aa:aa:aa:00:0a detected! executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 32.243141] kasan: CONFIG_KASAN_INLINE enabled [ 32.247831] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 32.255217] general protection fault: 0000 [#1] SMP KASAN [ 32.260739] Dumping ftrace buffer: [ 32.264304] (ftrace buffer empty) [ 32.267998] Modules linked in: [ 32.271175] CPU: 0 PID: 4720 Comm: syzkaller120227 Not tainted 4.16.0-rc2+ #327 [ 32.278607] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.287944] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 32.293020] RSP: 0018:ffff8801d6e2f9a8 EFLAGS: 00010202 [ 32.298364] RAX: dffffc0000000000 RBX: ffff8801bfc889c0 RCX: ffffffff854ae0e0 [ 32.305615] RDX: 0000000000000045 RSI: 00000000d493d6a9 RDI: 0000000000000228 [ 32.312871] RBP: ffff8801d6e2fc28 R08: 1ffff1003adc5e77 R09: 0000000000000002 [ 32.320123] R10: ffff8801d6e2f878 R11: 0000000000000000 R12: ffff8801c0d5db00 [ 32.327366] R13: ffff8801d6e2fc00 R14: 0000000000000000 R15: ffff8801d6e2fae0 [ 32.334618] FS: 0000000001a62880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 32.342817] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.348672] CR2: 00000000205fafd2 CR3: 00000001b76f2003 CR4: 00000000001606f0 [ 32.355915] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.363159] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.370405] Call Trace: [ 32.372977] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 32.378149] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 32.383496] ? selinux_socket_connect+0x311/0x730 [ 32.388316] ? lock_downgrade+0x980/0x980 [ 32.392439] ? selinux_socket_setsockopt+0x80/0x80 [ 32.397339] ? lock_release+0xa40/0xa40 [ 32.401285] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 32.407156] ? __check_object_size+0x8b/0x530 [ 32.411638] ? __might_sleep+0x95/0x190 [ 32.415597] ? security_socket_connect+0x89/0xb0 [ 32.420329] SYSC_connect+0x213/0x4a0 [ 32.424114] ? SYSC_bind+0x410/0x410 [ 32.427814] ? __handle_mm_fault+0x3b60/0x3b60 [ 32.432365] ? vmacache_find+0x5f/0x280 [ 32.436310] ? vmacache_update+0xfe/0x130 [ 32.440446] ? mm_fault_error+0x2c0/0x2c0 [ 32.444564] ? move_addr_to_kernel+0x60/0x60 [ 32.448953] ? SyS_accept+0x30/0x30 [ 32.452554] SyS_connect+0x24/0x30 [ 32.456077] do_syscall_64+0x280/0x940 [ 32.459936] ? __do_page_fault+0xc90/0xc90 [ 32.464143] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 32.468870] ? syscall_return_slowpath+0x550/0x550 [ 32.473781] ? syscall_return_slowpath+0x2ac/0x550 [ 32.478692] ? prepare_exit_to_usermode+0x350/0x350 [ 32.483689] ? retint_user+0x18/0x18 [ 32.487379] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.492204] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 32.497365] RIP: 0033:0x446099 [ 32.500525] RSP: 002b:00007fff8c38f278 EFLAGS: 00000203 ORIG_RAX: 000000000000002a [ 32.508204] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000446099 [ 32.515448] RDX: 000000000000002e RSI: 00000000205fafd2 RDI: 0000000000000005 [ 32.522691] RBP: 0000000000007deb R08: 000000008c38f2c0 R09: 000000008c38f2c0 [ 32.529936] R10: 000000008c38f2c0 R11: 0000000000000203 R12: 0000000000000000 [ 32.537179] R13: 00000000006d3428 R14: 0000000000000000 R15: 0000000000000000 [ 32.544430] Code: fe ff ff e8 c0 2b 26 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 df 09 00 00 4c 89 fa 48 b8 00 00 00 00 00 fc [ 32.563514] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801d6e2f9a8 [ 32.570279] ---[ end trace 510eddf54beac51b ]--- [ 32.575048] Kernel panic - not syncing: Fatal exception [ 32.580909] Dumping ftrace buffer: [ 32.584429] (ftrace buffer empty) [ 32.588113] Kernel Offset: disabled [ 32.591714] Rebooting in 86400 seconds..