[....] Starting enhanced syslogd: rsyslogd[ 17.240957] audit: type=1400 audit(1521054697.494:5): avc: denied { syslog } for pid=4098 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: [ 22.901466] audit: type=1400 audit(1521054703.155:6): avc: denied { map } for pid=4238 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 '10.128.0.10' (ECDSA) to the list of known hosts. net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 53.901349] audit: type=1400 audit(1521054734.155:7): avc: denied { map } for pid=4254 comm="syzkaller614901" path="/root/syzkaller614901553" 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 [ 53.908229] IPVS: ftp: loaded support on port[0] = 21 RTNETLINK answers: File exists RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 54.150743] ip (4300) used greatest stack depth: 16664 bytes left [ 54.184583] 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 [ 54.540877] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 54.546985] 8021q: adding VLAN 0 to HW filter on device bond0 executing program [ 54.585653] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 54.625486] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 54.632944] ================================================================== [ 54.640417] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 54.647333] Read of size 8 at addr ffff8801ca579818 by task syzkaller614901/4255 [ 54.654839] [ 54.656442] CPU: 0 PID: 4255 Comm: syzkaller614901 Not tainted 4.16.0-rc5+ #353 [ 54.663858] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.673183] Call Trace: [ 54.675748] dump_stack+0x194/0x24d [ 54.679362] ? arch_local_irq_restore+0x53/0x53 [ 54.684006] ? show_regs_print_info+0x18/0x18 [ 54.688477] ? ip6_xmit+0x1f76/0x2260 [ 54.692250] print_address_description+0x73/0x250 [ 54.697063] ? ip6_xmit+0x1f76/0x2260 [ 54.700835] kasan_report+0x23c/0x360 [ 54.704610] __asan_report_load8_noabort+0x14/0x20 [ 54.709510] ip6_xmit+0x1f76/0x2260 [ 54.713135] ? ip6_finish_output2+0x23a0/0x23a0 [ 54.717779] ? fl6_update_dst+0x127/0x2b0 [ 54.721900] ? inet6_csk_route_socket+0x691/0xe80 [ 54.726713] ? trace_hardirqs_off+0x10/0x10 [ 54.731006] ? lock_acquire+0x1d5/0x580 [ 54.734947] ? lock_acquire+0x1d5/0x580 [ 54.738888] ? inet6_csk_xmit+0x114/0x580 [ 54.743008] ? trace_hardirqs_off+0x10/0x10 [ 54.747301] ? lock_release+0xa40/0xa40 [ 54.751259] inet6_csk_xmit+0x2fc/0x580 [ 54.755206] ? inet6_csk_update_pmtu+0x160/0x160 [ 54.759930] ? __sk_dst_check+0x1a5/0x380 [ 54.764051] ? sock_kfree_s+0x60/0x60 [ 54.767837] l2tp_xmit_skb+0x105f/0x1410 [ 54.771880] ? l2tp_session_create+0xb80/0xb80 [ 54.776437] ? sock_wmalloc+0x15d/0x1d0 [ 54.780385] ? iov_iter_advance+0x13f0/0x13f0 [ 54.784856] ? pppol2tp_sendmsg+0x41b/0x670 [ 54.789150] pppol2tp_sendmsg+0x470/0x670 [ 54.793273] ? selinux_socket_sendmsg+0x36/0x40 [ 54.797921] ? pppol2tp_getsockopt+0x900/0x900 [ 54.802477] sock_sendmsg+0xca/0x110 [ 54.806164] SYSC_sendto+0x361/0x5c0 [ 54.809855] ? SYSC_connect+0x4a0/0x4a0 [ 54.813811] ? inet_dgram_connect+0x172/0x1f0 [ 54.818278] ? SYSC_connect+0x2e0/0x4a0 [ 54.822250] ? mm_fault_error+0x2c0/0x2c0 [ 54.826368] ? move_addr_to_kernel+0x60/0x60 [ 54.830751] SyS_sendto+0x40/0x50 [ 54.834173] ? SyS_getpeername+0x30/0x30 [ 54.838216] do_syscall_64+0x281/0x940 [ 54.842070] ? __do_page_fault+0xc90/0xc90 [ 54.846276] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 54.851005] ? syscall_return_slowpath+0x550/0x550 [ 54.855904] ? syscall_return_slowpath+0x2ac/0x550 [ 54.860803] ? prepare_exit_to_usermode+0x350/0x350 [ 54.865790] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 54.871130] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 54.875946] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 54.881101] RIP: 0033:0x442839 [ 54.884259] RSP: 002b:00007ffed8795d38 EFLAGS: 00000216 ORIG_RAX: 000000000000002c [ 54.891935] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000442839 [ 54.899176] RDX: 0000000000000000 RSI: 0000000020001180 RDI: 0000000000000004 [ 54.906416] RBP: 00000000004a4901 R08: 00000000200021c0 R09: 0000000000000080 [ 54.913655] R10: 0000000000040001 R11: 0000000000000216 R12: 00007ffed8795e20 [ 54.920896] R13: 0000000000403560 R14: 0000000000000000 R15: 0000000000000000 [ 54.928157] [ 54.929753] Allocated by task 0: [ 54.933087] (stack is not available) [ 54.936767] [ 54.938360] Freed by task 0: [ 54.941343] (stack is not available) [ 54.945022] [ 54.946619] The buggy address belongs to the object at ffff8801ca579800 [ 54.946619] which belongs to the cache ip_dst_cache of size 168 [ 54.959415] The buggy address is located 24 bytes inside of [ 54.959415] 168-byte region [ffff8801ca579800, ffff8801ca5798a8) [ 54.971168] The buggy address belongs to the page: [ 54.976065] page:ffffea0007295e40 count:1 mapcount:0 mapping:ffff8801ca579000 index:0x0 [ 54.984177] flags: 0x2fffc0000000100(slab) [ 54.988382] raw: 02fffc0000000100 ffff8801ca579000 0000000000000000 0000000100000010 [ 54.996230] raw: ffff8801d5bb2e48 ffffea0006c59da0 ffff8801d5bb1800 0000000000000000 [ 55.004086] page dumped because: kasan: bad access detected [ 55.009760] [ 55.011354] Memory state around the buggy address: [ 55.016251] ffff8801ca579700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 55.023577] ffff8801ca579780: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 55.030902] >ffff8801ca579800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 55.038228] ^ [ 55.042341] ffff8801ca579880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 55.049667] ffff8801ca579900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 55.056995] ================================================================== [ 55.064319] Disabling lock debugging due to kernel taint [ 55.069767] Kernel panic - not syncing: panic_on_warn set ... [ 55.069767] [ 55.077103] CPU: 0 PID: 4255 Comm: syzkaller614901 Tainted: G B 4.16.0-rc5+ #353 [ 55.085816] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.095137] Call Trace: [ 55.097695] dump_stack+0x194/0x24d [ 55.101290] ? arch_local_irq_restore+0x53/0x53 [ 55.105929] ? kasan_end_report+0x32/0x50 [ 55.110055] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 55.114782] ? vsnprintf+0x1ed/0x1900 [ 55.118553] ? ip6_xmit+0x1f30/0x2260 [ 55.122321] panic+0x1e4/0x41c [ 55.125483] ? refcount_error_report+0x214/0x214 [ 55.130214] ? add_taint+0x1c/0x50 [ 55.133720] ? add_taint+0x1c/0x50 [ 55.137241] ? ip6_xmit+0x1f76/0x2260 [ 55.141011] kasan_end_report+0x50/0x50 [ 55.144956] kasan_report+0x149/0x360 [ 55.148731] __asan_report_load8_noabort+0x14/0x20 [ 55.153630] ip6_xmit+0x1f76/0x2260 [ 55.157232] ? ip6_finish_output2+0x23a0/0x23a0 [ 55.161872] ? fl6_update_dst+0x127/0x2b0 [ 55.165992] ? inet6_csk_route_socket+0x691/0xe80 [ 55.170803] ? trace_hardirqs_off+0x10/0x10 [ 55.175093] ? lock_acquire+0x1d5/0x580 [ 55.179032] ? lock_acquire+0x1d5/0x580 [ 55.182973] ? inet6_csk_xmit+0x114/0x580 [ 55.187090] ? trace_hardirqs_off+0x10/0x10 [ 55.191379] ? lock_release+0xa40/0xa40 [ 55.196112] inet6_csk_xmit+0x2fc/0x580 [ 55.200058] ? inet6_csk_update_pmtu+0x160/0x160 [ 55.204785] ? __sk_dst_check+0x1a5/0x380 [ 55.208909] ? sock_kfree_s+0x60/0x60 [ 55.212688] l2tp_xmit_skb+0x105f/0x1410 [ 55.216725] ? l2tp_session_create+0xb80/0xb80 [ 55.221279] ? sock_wmalloc+0x15d/0x1d0 [ 55.225222] ? iov_iter_advance+0x13f0/0x13f0 [ 55.229685] ? pppol2tp_sendmsg+0x41b/0x670 [ 55.233974] pppol2tp_sendmsg+0x470/0x670 [ 55.238092] ? selinux_socket_sendmsg+0x36/0x40 [ 55.242727] ? pppol2tp_getsockopt+0x900/0x900 [ 55.247275] sock_sendmsg+0xca/0x110 [ 55.250956] SYSC_sendto+0x361/0x5c0 [ 55.254638] ? SYSC_connect+0x4a0/0x4a0 [ 55.258594] ? inet_dgram_connect+0x172/0x1f0 [ 55.263062] ? SYSC_connect+0x2e0/0x4a0 [ 55.267027] ? mm_fault_error+0x2c0/0x2c0 [ 55.271145] ? move_addr_to_kernel+0x60/0x60 [ 55.275540] SyS_sendto+0x40/0x50 [ 55.278969] ? SyS_getpeername+0x30/0x30 [ 55.283000] do_syscall_64+0x281/0x940 [ 55.286852] ? __do_page_fault+0xc90/0xc90 [ 55.291056] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 55.295781] ? syscall_return_slowpath+0x550/0x550 [ 55.300679] ? syscall_return_slowpath+0x2ac/0x550 [ 55.305577] ? prepare_exit_to_usermode+0x350/0x350 [ 55.310562] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 55.315900] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 55.320718] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 55.325874] RIP: 0033:0x442839 [ 55.329034] RSP: 002b:00007ffed8795d38 EFLAGS: 00000216 ORIG_RAX: 000000000000002c [ 55.336712] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000442839 [ 55.343949] RDX: 0000000000000000 RSI: 0000000020001180 RDI: 0000000000000004 [ 55.351187] RBP: 00000000004a4901 R08: 00000000200021c0 R09: 0000000000000080 [ 55.358436] R10: 0000000000040001 R11: 0000000000000216 R12: 00007ffed8795e20 [ 55.365674] R13: 0000000000403560 R14: 0000000000000000 R15: 0000000000000000 [ 55.373325] Dumping ftrace buffer: [ 55.376836] (ftrace buffer empty) [ 55.380515] Kernel Offset: disabled [ 55.384114] Rebooting in 86400 seconds..