[....] Starting enhanced syslogd: rsyslogd[ 17.307470] audit: type=1400 audit(1521026286.071:5): avc: denied { syslog } for pid=4092 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: [ 23.310630] audit: type=1400 audit(1521026292.074:6): avc: denied { map } for pid=4232 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 '10.128.0.18' (ECDSA) to the list of known hosts. [ 33.367628] audit: type=1400 audit(1521026302.131:7): avc: denied { map } for pid=4247 comm="syzkaller341579" path="/root/syzkaller341579628" 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 [ 33.375774] IPVS: ftp: loaded support on port[0] = 21 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 33.393603] audit: type=1400 audit(1521026302.131:8): avc: denied { sys_admin } for pid=4247 comm="syzkaller341579" 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 [ 33.423223] audit: type=1400 audit(1521026302.163:9): avc: denied { net_admin } for pid=4248 comm="syzkaller341579" 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 [ 33.651556] 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 [ 34.009904] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 34.016045] 8021q: adding VLAN 0 to HW filter on device bond0 [ 34.055990] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready executing program [ 34.096727] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 34.110478] audit: type=1400 audit(1521026302.874:10): avc: denied { sys_chroot } for pid=4248 comm="syzkaller341579" 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 [ 34.113458] ================================================================== [ 34.142482] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 34.149071] Read of size 8 at addr ffff8801cc0c7618 by task syzkaller341579/4248 [ 34.156596] [ 34.158201] CPU: 1 PID: 4248 Comm: syzkaller341579 Not tainted 4.16.0-rc5+ #352 [ 34.165632] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.174961] Call Trace: [ 34.178490] dump_stack+0x194/0x24d [ 34.182102] ? arch_local_irq_restore+0x53/0x53 [ 34.186753] ? show_regs_print_info+0x18/0x18 [ 34.191227] ? ip6_xmit+0x1f76/0x2260 [ 34.195264] print_address_description+0x73/0x250 [ 34.200081] ? ip6_xmit+0x1f76/0x2260 [ 34.203857] kasan_report+0x23c/0x360 [ 34.207644] __asan_report_load8_noabort+0x14/0x20 [ 34.212555] ip6_xmit+0x1f76/0x2260 [ 34.216168] ? ip6_finish_output2+0x23a0/0x23a0 [ 34.220812] ? fl6_update_dst+0x127/0x2b0 [ 34.224935] ? inet6_csk_route_socket+0x691/0xe80 [ 34.229755] ? trace_hardirqs_off+0x10/0x10 [ 34.234052] ? lock_acquire+0x1d5/0x580 [ 34.238002] ? lock_acquire+0x1d5/0x580 [ 34.241956] ? inet6_csk_xmit+0x114/0x580 [ 34.246081] ? trace_hardirqs_off+0x10/0x10 [ 34.250378] ? lock_release+0xa40/0xa40 [ 34.254341] inet6_csk_xmit+0x2fc/0x580 [ 34.258291] ? inet6_csk_update_pmtu+0x160/0x160 [ 34.263019] ? __sk_dst_check+0x1a5/0x380 [ 34.267139] ? sock_kfree_s+0x60/0x60 [ 34.270926] l2tp_xmit_skb+0x105f/0x1410 [ 34.274969] ? l2tp_session_create+0xb80/0xb80 [ 34.279524] ? sock_wmalloc+0x15d/0x1d0 [ 34.283471] ? iov_iter_advance+0x13f0/0x13f0 [ 34.287940] ? pppol2tp_sendmsg+0x41b/0x670 [ 34.292234] pppol2tp_sendmsg+0x470/0x670 [ 34.296355] ? selinux_socket_sendmsg+0x36/0x40 [ 34.300997] ? pppol2tp_getsockopt+0x900/0x900 [ 34.305565] sock_sendmsg+0xca/0x110 [ 34.309253] SYSC_sendto+0x361/0x5c0 [ 34.312941] ? SYSC_connect+0x4a0/0x4a0 [ 34.316896] ? inet_dgram_connect+0x172/0x1f0 [ 34.321364] ? SYSC_connect+0x2e0/0x4a0 [ 34.325341] ? mm_fault_error+0x2c0/0x2c0 [ 34.329463] ? move_addr_to_kernel+0x60/0x60 [ 34.333858] SyS_sendto+0x40/0x50 [ 34.337283] ? SyS_getpeername+0x30/0x30 [ 34.341332] do_syscall_64+0x281/0x940 [ 34.345195] ? __do_page_fault+0xc90/0xc90 [ 34.349401] ? _raw_spin_unlock_irq+0x27/0x70 [ 34.353873] ? finish_task_switch+0x1c1/0x7e0 [ 34.358342] ? syscall_return_slowpath+0x550/0x550 [ 34.363246] ? syscall_return_slowpath+0x2ac/0x550 [ 34.368154] ? prepare_exit_to_usermode+0x350/0x350 [ 34.373147] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 34.378497] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.383318] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 34.388478] RIP: 0033:0x441eb9 [ 34.391643] RSP: 002b:00000000007dfe68 EFLAGS: 00000216 ORIG_RAX: 000000000000002c [ 34.399328] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000441eb9 [ 34.406575] RDX: 0000000000000000 RSI: 0000000020001180 RDI: 0000000000000004 [ 34.413822] RBP: 00000000004a3ee6 R08: 00000000200021c0 R09: 0000000000000080 [ 34.421069] R10: 0000000000040001 R11: 0000000000000216 R12: 00000000007dff70 [ 34.428330] R13: 0000000000402ef0 R14: 0000000000000000 R15: 0000000000000000 [ 34.435588] [ 34.437188] Allocated by task 0: [ 34.440521] (stack is not available) [ 34.444204] [ 34.445800] Freed by task 0: [ 34.448785] (stack is not available) [ 34.452468] [ 34.454067] The buggy address belongs to the object at ffff8801cc0c7600 [ 34.454067] which belongs to the cache ip_dst_cache of size 168 [ 34.466780] The buggy address is located 24 bytes inside of [ 34.466780] 168-byte region [ffff8801cc0c7600, ffff8801cc0c76a8) [ 34.478545] The buggy address belongs to the page: [ 34.483456] page:ffffea00073031c0 count:1 mapcount:0 mapping:ffff8801cc0c7000 index:0xffff8801cc0c7000 [ 34.492871] flags: 0x2fffc0000000100(slab) [ 34.497076] raw: 02fffc0000000100 ffff8801cc0c7000 ffff8801cc0c7000 000000010000000c [ 34.504926] raw: ffff8801d5bec738 ffff8801d5bec738 ffff8801d5beeb00 0000000000000000 [ 34.513130] page dumped because: kasan: bad access detected [ 34.518815] [ 34.520414] Memory state around the buggy address: [ 34.525319] ffff8801cc0c7500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.532654] ffff8801cc0c7580: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 34.539984] >ffff8801cc0c7600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.547331] ^ [ 34.551457] ffff8801cc0c7680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.558786] ffff8801cc0c7700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.566141] ================================================================== [ 34.573472] Disabling lock debugging due to kernel taint [ 34.578929] Kernel panic - not syncing: panic_on_warn set ... [ 34.578929] [ 34.586364] CPU: 1 PID: 4248 Comm: syzkaller341579 Tainted: G B 4.16.0-rc5+ #352 [ 34.595091] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.604414] Call Trace: [ 34.606975] dump_stack+0x194/0x24d [ 34.610576] ? arch_local_irq_restore+0x53/0x53 [ 34.615216] ? kasan_end_report+0x32/0x50 [ 34.619337] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 34.624071] ? vsnprintf+0x1ed/0x1900 [ 34.627934] ? ip6_xmit+0x1f30/0x2260 [ 34.631705] panic+0x1e4/0x41c [ 34.634876] ? refcount_error_report+0x214/0x214 [ 34.639601] ? add_taint+0x1c/0x50 [ 34.643110] ? add_taint+0x1c/0x50 [ 34.646620] ? ip6_xmit+0x1f76/0x2260 [ 34.650391] kasan_end_report+0x50/0x50 [ 34.654334] kasan_report+0x149/0x360 [ 34.658105] __asan_report_load8_noabort+0x14/0x20 [ 34.663005] ip6_xmit+0x1f76/0x2260 [ 34.666620] ? ip6_finish_output2+0x23a0/0x23a0 [ 34.671263] ? fl6_update_dst+0x127/0x2b0 [ 34.675383] ? inet6_csk_route_socket+0x691/0xe80 [ 34.680200] ? trace_hardirqs_off+0x10/0x10 [ 34.684494] ? lock_acquire+0x1d5/0x580 [ 34.688444] ? lock_acquire+0x1d5/0x580 [ 34.692392] ? inet6_csk_xmit+0x114/0x580 [ 34.696512] ? trace_hardirqs_off+0x10/0x10 [ 34.700807] ? lock_release+0xa40/0xa40 [ 34.704764] inet6_csk_xmit+0x2fc/0x580 [ 34.708711] ? inet6_csk_update_pmtu+0x160/0x160 [ 34.713437] ? __sk_dst_check+0x1a5/0x380 [ 34.717558] ? sock_kfree_s+0x60/0x60 [ 34.721339] l2tp_xmit_skb+0x105f/0x1410 [ 34.725378] ? l2tp_session_create+0xb80/0xb80 [ 34.729929] ? sock_wmalloc+0x15d/0x1d0 [ 34.733876] ? iov_iter_advance+0x13f0/0x13f0 [ 34.738343] ? pppol2tp_sendmsg+0x41b/0x670 [ 34.742638] pppol2tp_sendmsg+0x470/0x670 [ 34.746758] ? selinux_socket_sendmsg+0x36/0x40 [ 34.751400] ? pppol2tp_getsockopt+0x900/0x900 [ 34.755952] sock_sendmsg+0xca/0x110 [ 34.759646] SYSC_sendto+0x361/0x5c0 [ 34.763333] ? SYSC_connect+0x4a0/0x4a0 [ 34.767284] ? inet_dgram_connect+0x172/0x1f0 [ 34.771761] ? SYSC_connect+0x2e0/0x4a0 [ 34.775721] ? mm_fault_error+0x2c0/0x2c0 [ 34.779840] ? move_addr_to_kernel+0x60/0x60 [ 34.784222] SyS_sendto+0x40/0x50 [ 34.787643] ? SyS_getpeername+0x30/0x30 [ 34.791679] do_syscall_64+0x281/0x940 [ 34.795535] ? __do_page_fault+0xc90/0xc90 [ 34.799746] ? _raw_spin_unlock_irq+0x27/0x70 [ 34.804210] ? finish_task_switch+0x1c1/0x7e0 [ 34.808673] ? syscall_return_slowpath+0x550/0x550 [ 34.813570] ? syscall_return_slowpath+0x2ac/0x550 [ 34.818472] ? prepare_exit_to_usermode+0x350/0x350 [ 34.823460] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 34.828794] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.833610] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 34.838768] RIP: 0033:0x441eb9 [ 34.841926] RSP: 002b:00000000007dfe68 EFLAGS: 00000216 ORIG_RAX: 000000000000002c [ 34.849602] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000441eb9 [ 34.856842] RDX: 0000000000000000 RSI: 0000000020001180 RDI: 0000000000000004 [ 34.864083] RBP: 00000000004a3ee6 R08: 00000000200021c0 R09: 0000000000000080 [ 34.871323] R10: 0000000000040001 R11: 0000000000000216 R12: 00000000007dff70 [ 34.878563] R13: 0000000000402ef0 R14: 0000000000000000 R15: 0000000000000000 [ 34.886203] Dumping ftrace buffer: [ 34.889717] (ftrace buffer empty) [ 34.893398] Kernel Offset: disabled [ 34.896999] Rebooting in 86400 seconds..