[....] Starting enhanced syslogd: rsyslogd[ 15.804367] audit: type=1400 audit(1520821531.617:5): avc: denied { syslog } for pid=3956 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 18.890280] audit: type=1400 audit(1520821534.702:6): avc: denied { map } for pid=4096 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 '10.128.0.59' (ECDSA) to the list of known hosts. [ 25.259257] audit: type=1400 audit(1520821541.072:7): avc: denied { map } for pid=4109 comm="syzkaller604130" path="/root/syzkaller604130994" 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 [ 25.270902] IPVS: ftp: loaded support on port[0] = 21 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 25.285432] audit: type=1400 audit(1520821541.072:8): avc: denied { sys_admin } for pid=4109 comm="syzkaller604130" capability=21 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 [ 25.334049] audit: type=1400 audit(1520821541.146:9): avc: denied { net_admin } for pid=4111 comm="syzkaller604130" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 RTNETLINK answers: File exists RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 25.571298] 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 [ 25.924817] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 25.930941] 8021q: adding VLAN 0 to HW filter on device bond0 executing program [ 25.968868] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 26.007038] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 26.019626] audit: type=1400 audit(1520821541.832:10): avc: denied { sys_chroot } for pid=4111 comm="syzkaller604130" capability=18 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 [ 26.023779] ================================================================== [ 26.051646] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 26.058127] Read of size 8 at addr ffff8801cd69a118 by task syzkaller604130/4111 [ 26.065634] [ 26.067242] CPU: 1 PID: 4111 Comm: syzkaller604130 Not tainted 4.16.0-rc4+ #260 [ 26.074662] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.083992] Call Trace: [ 26.086563] dump_stack+0x194/0x24d [ 26.090172] ? arch_local_irq_restore+0x53/0x53 [ 26.094819] ? show_regs_print_info+0x18/0x18 [ 26.099298] ? ip6_xmit+0x1f76/0x2260 [ 26.103082] print_address_description+0x73/0x250 [ 26.107902] ? ip6_xmit+0x1f76/0x2260 [ 26.111680] kasan_report+0x23c/0x360 [ 26.115461] __asan_report_load8_noabort+0x14/0x20 [ 26.120366] ip6_xmit+0x1f76/0x2260 [ 26.123983] ? ip6_finish_output2+0x23d0/0x23d0 [ 26.128634] ? fl6_update_dst+0x127/0x2b0 [ 26.132763] ? inet6_csk_route_socket+0x691/0xe80 [ 26.137589] ? trace_hardirqs_off+0x10/0x10 [ 26.141888] ? lock_acquire+0x1d5/0x580 [ 26.145839] ? lock_acquire+0x1d5/0x580 [ 26.149794] ? inet6_csk_xmit+0x114/0x580 [ 26.153922] ? trace_hardirqs_off+0x10/0x10 [ 26.158224] ? lock_release+0xa40/0xa40 [ 26.162192] inet6_csk_xmit+0x2fc/0x580 [ 26.166149] ? inet6_csk_update_pmtu+0x160/0x160 [ 26.170883] ? __sk_dst_check+0x1a5/0x380 [ 26.175018] ? sock_kzfree_s+0x60/0x60 [ 26.178911] l2tp_xmit_skb+0x105f/0x1410 [ 26.182963] ? l2tp_session_create+0xb80/0xb80 [ 26.187527] ? sock_wmalloc+0x15d/0x1d0 [ 26.191482] ? iov_iter_advance+0x13f0/0x13f0 [ 26.195959] ? pppol2tp_sendmsg+0x41b/0x670 [ 26.200263] pppol2tp_sendmsg+0x470/0x670 [ 26.204394] ? selinux_socket_sendmsg+0x36/0x40 [ 26.209046] ? pppol2tp_getsockopt+0x900/0x900 [ 26.213607] sock_sendmsg+0xca/0x110 [ 26.217302] SYSC_sendto+0x361/0x5c0 [ 26.220997] ? SYSC_connect+0x4a0/0x4a0 [ 26.224966] ? inet_dgram_connect+0x172/0x1f0 [ 26.229438] ? SYSC_connect+0x2e0/0x4a0 [ 26.233417] ? mm_fault_error+0x2c0/0x2c0 [ 26.237541] ? move_addr_to_kernel+0x60/0x60 [ 26.241931] SyS_sendto+0x40/0x50 [ 26.245361] ? SyS_getpeername+0x30/0x30 [ 26.249405] do_syscall_64+0x281/0x940 [ 26.253270] ? __do_page_fault+0xc90/0xc90 [ 26.257483] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.261960] ? finish_task_switch+0x1c1/0x7e0 [ 26.266435] ? syscall_return_slowpath+0x550/0x550 [ 26.271344] ? syscall_return_slowpath+0x2ac/0x550 [ 26.276258] ? prepare_exit_to_usermode+0x350/0x350 [ 26.281253] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 26.286598] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.291425] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 26.296592] RIP: 0033:0x441ca9 [ 26.299759] RSP: 002b:00000000007dfe98 EFLAGS: 00000212 ORIG_RAX: 000000000000002c [ 26.307449] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000441ca9 [ 26.314694] RDX: 0000000000000000 RSI: 0000000020001180 RDI: 0000000000000004 [ 26.321939] RBP: 00000000004a3cc6 R08: 00000000200021c0 R09: 0000000000000080 [ 26.329187] R10: 0000000000040001 R11: 0000000000000212 R12: 00000000007dff70 [ 26.336433] R13: 0000000000402ce0 R14: 0000000000000000 R15: 0000000000000000 [ 26.343695] [ 26.345302] Allocated by task 0: [ 26.348644] (stack is not available) [ 26.352331] [ 26.353933] Freed by task 0: [ 26.356925] (stack is not available) [ 26.360610] [ 26.362219] The buggy address belongs to the object at ffff8801cd69a100 [ 26.362219] which belongs to the cache ip_dst_cache of size 160 [ 26.374936] The buggy address is located 24 bytes inside of [ 26.374936] 160-byte region [ffff8801cd69a100, ffff8801cd69a1a0) [ 26.386698] The buggy address belongs to the page: [ 26.391604] page:ffffea000735a680 count:1 mapcount:0 mapping:ffff8801cd69a000 index:0x0 [ 26.399721] flags: 0x2fffc0000000100(slab) [ 26.403933] raw: 02fffc0000000100 ffff8801cd69a000 0000000000000000 0000000100000010 [ 26.411802] raw: ffffea0006d85420 ffff8801d6fd9148 ffff8801d82a9040 0000000000000000 [ 26.419658] page dumped because: kasan: bad access detected [ 26.425342] [ 26.426947] Memory state around the buggy address: [ 26.431864] ffff8801cd69a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.439200] ffff8801cd69a080: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc [ 26.446535] >ffff8801cd69a100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.453870] ^ [ 26.457996] ffff8801cd69a180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.465337] ffff8801cd69a200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.472671] ================================================================== [ 26.480007] Disabling lock debugging due to kernel taint [ 26.485482] Kernel panic - not syncing: panic_on_warn set ... [ 26.485482] [ 26.492831] CPU: 1 PID: 4111 Comm: syzkaller604130 Tainted: G B 4.16.0-rc4+ #260 [ 26.501555] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.510884] Call Trace: [ 26.513453] dump_stack+0x194/0x24d [ 26.517058] ? arch_local_irq_restore+0x53/0x53 [ 26.521715] ? kasan_end_report+0x32/0x50 [ 26.525845] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 26.530589] ? vsnprintf+0x1ed/0x1900 [ 26.534370] ? ip6_xmit+0x1eb0/0x2260 [ 26.538152] panic+0x1e4/0x41c [ 26.541322] ? refcount_error_report+0x214/0x214 [ 26.546055] ? add_taint+0x1c/0x50 [ 26.549572] ? add_taint+0x1c/0x50 [ 26.553093] ? ip6_xmit+0x1f76/0x2260 [ 26.556880] kasan_end_report+0x50/0x50 [ 26.560840] kasan_report+0x149/0x360 [ 26.564620] __asan_report_load8_noabort+0x14/0x20 [ 26.569525] ip6_xmit+0x1f76/0x2260 [ 26.573135] ? ip6_finish_output2+0x23d0/0x23d0 [ 26.577793] ? fl6_update_dst+0x127/0x2b0 [ 26.581938] ? inet6_csk_route_socket+0x691/0xe80 [ 26.586773] ? trace_hardirqs_off+0x10/0x10 [ 26.591072] ? lock_acquire+0x1d5/0x580 [ 26.595040] ? lock_acquire+0x1d5/0x580 [ 26.598989] ? inet6_csk_xmit+0x114/0x580 [ 26.603113] ? trace_hardirqs_off+0x10/0x10 [ 26.607413] ? lock_release+0xa40/0xa40 [ 26.611370] inet6_csk_xmit+0x2fc/0x580 [ 26.615319] ? inet6_csk_update_pmtu+0x160/0x160 [ 26.620055] ? __sk_dst_check+0x1a5/0x380 [ 26.624178] ? sock_kzfree_s+0x60/0x60 [ 26.628055] l2tp_xmit_skb+0x105f/0x1410 [ 26.632095] ? l2tp_session_create+0xb80/0xb80 [ 26.636652] ? sock_wmalloc+0x15d/0x1d0 [ 26.640602] ? iov_iter_advance+0x13f0/0x13f0 [ 26.645075] ? pppol2tp_sendmsg+0x41b/0x670 [ 26.649375] pppol2tp_sendmsg+0x470/0x670 [ 26.653498] ? selinux_socket_sendmsg+0x36/0x40 [ 26.658145] ? pppol2tp_getsockopt+0x900/0x900 [ 26.662706] sock_sendmsg+0xca/0x110 [ 26.666397] SYSC_sendto+0x361/0x5c0 [ 26.670090] ? SYSC_connect+0x4a0/0x4a0 [ 26.674050] ? inet_dgram_connect+0x172/0x1f0 [ 26.678522] ? SYSC_connect+0x2e0/0x4a0 [ 26.682487] ? mm_fault_error+0x2c0/0x2c0 [ 26.686609] ? move_addr_to_kernel+0x60/0x60 [ 26.690995] SyS_sendto+0x40/0x50 [ 26.694427] ? SyS_getpeername+0x30/0x30 [ 26.698463] do_syscall_64+0x281/0x940 [ 26.702326] ? __do_page_fault+0xc90/0xc90 [ 26.706534] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.711008] ? finish_task_switch+0x1c1/0x7e0 [ 26.715486] ? syscall_return_slowpath+0x550/0x550 [ 26.720391] ? syscall_return_slowpath+0x2ac/0x550 [ 26.725299] ? prepare_exit_to_usermode+0x350/0x350 [ 26.730291] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 26.735631] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.740452] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 26.745617] RIP: 0033:0x441ca9 [ 26.748784] RSP: 002b:00000000007dfe98 EFLAGS: 00000212 ORIG_RAX: 000000000000002c [ 26.756465] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000441ca9 [ 26.763711] RDX: 0000000000000000 RSI: 0000000020001180 RDI: 0000000000000004 [ 26.770955] RBP: 00000000004a3cc6 R08: 00000000200021c0 R09: 0000000000000080 [ 26.778203] R10: 0000000000040001 R11: 0000000000000212 R12: 00000000007dff70 [ 26.785446] R13: 0000000000402ce0 R14: 0000000000000000 R15: 0000000000000000 [ 26.793132] Dumping ftrace buffer: [ 26.796645] (ftrace buffer empty) [ 26.800332] Kernel Offset: disabled [ 26.803933] Rebooting in 86400 seconds..