[....] Starting enhanced syslogd: rsyslogd[ 17.131314] audit: type=1400 audit(1520758337.702:5): avc: denied { syslog } for pid=4089 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: [ 22.013618] audit: type=1400 audit(1520758342.584:6): avc: denied { map } for pid=4228 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 '10.128.0.33' (ECDSA) to the list of known hosts. [ 28.343332] audit: type=1400 audit(1520758348.914:7): avc: denied { map } for pid=4242 comm="syzkaller624649" path="/root/syzkaller624649655" 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 [ 28.355236] IPVS: ftp: loaded support on port[0] = 21 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 28.369310] audit: type=1400 audit(1520758348.914:8): avc: denied { sys_admin } for pid=4242 comm="syzkaller624649" 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 [ 28.402649] audit: type=1400 audit(1520758348.973:9): avc: denied { net_admin } for pid=4243 comm="syzkaller624649" 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 [ 28.664698] 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 [ 29.041381] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 29.047499] 8021q: adding VLAN 0 to HW filter on device bond0 [ 29.086828] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready executing program [ 29.127806] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 29.141379] audit: type=1400 audit(1520758349.712:10): avc: denied { sys_chroot } for pid=4243 comm="syzkaller624649" 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 [ 29.145547] ================================================================== [ 29.173880] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 29.180351] Read of size 8 at addr ffff8801b0cfc118 by task syzkaller624649/4243 [ 29.187853] [ 29.189456] CPU: 0 PID: 4243 Comm: syzkaller624649 Not tainted 4.16.0-rc4+ #260 [ 29.196872] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.206198] Call Trace: [ 29.208762] dump_stack+0x194/0x24d [ 29.212366] ? arch_local_irq_restore+0x53/0x53 [ 29.217008] ? show_regs_print_info+0x18/0x18 [ 29.221488] ? ip6_xmit+0x1f76/0x2260 [ 29.225267] print_address_description+0x73/0x250 [ 29.230085] ? ip6_xmit+0x1f76/0x2260 [ 29.233868] kasan_report+0x23c/0x360 [ 29.237650] __asan_report_load8_noabort+0x14/0x20 [ 29.242551] ip6_xmit+0x1f76/0x2260 [ 29.246163] ? ip6_finish_output2+0x23d0/0x23d0 [ 29.250813] ? fl6_update_dst+0x127/0x2b0 [ 29.254936] ? inet6_csk_route_socket+0x691/0xe80 [ 29.259755] ? trace_hardirqs_off+0x10/0x10 [ 29.264049] ? lock_acquire+0x1d5/0x580 [ 29.267996] ? lock_acquire+0x1d5/0x580 [ 29.271946] ? inet6_csk_xmit+0x114/0x580 [ 29.276067] ? trace_hardirqs_off+0x10/0x10 [ 29.280363] ? lock_release+0xa40/0xa40 [ 29.284328] inet6_csk_xmit+0x2fc/0x580 [ 29.288276] ? inet6_csk_update_pmtu+0x160/0x160 [ 29.293007] ? __sk_dst_check+0x1a5/0x380 [ 29.297136] ? sock_kzfree_s+0x60/0x60 [ 29.301019] l2tp_xmit_skb+0x105f/0x1410 [ 29.305067] ? l2tp_session_create+0xb80/0xb80 [ 29.309622] ? sock_wmalloc+0x15d/0x1d0 [ 29.313574] ? iov_iter_advance+0x13f0/0x13f0 [ 29.318047] ? pppol2tp_sendmsg+0x41b/0x670 [ 29.322347] pppol2tp_sendmsg+0x470/0x670 [ 29.326482] ? selinux_socket_sendmsg+0x36/0x40 [ 29.331127] ? pppol2tp_getsockopt+0x900/0x900 [ 29.335682] sock_sendmsg+0xca/0x110 [ 29.339368] SYSC_sendto+0x361/0x5c0 [ 29.343060] ? SYSC_connect+0x4a0/0x4a0 [ 29.347027] ? inet_dgram_connect+0x172/0x1f0 [ 29.351497] ? SYSC_connect+0x2e0/0x4a0 [ 29.355473] ? mm_fault_error+0x2c0/0x2c0 [ 29.359593] ? move_addr_to_kernel+0x60/0x60 [ 29.363976] SyS_sendto+0x40/0x50 [ 29.367403] ? SyS_getpeername+0x30/0x30 [ 29.371438] do_syscall_64+0x281/0x940 [ 29.375295] ? __do_page_fault+0xc90/0xc90 [ 29.379504] ? _raw_spin_unlock_irq+0x27/0x70 [ 29.383975] ? finish_task_switch+0x1c1/0x7e0 [ 29.388445] ? syscall_return_slowpath+0x550/0x550 [ 29.393436] ? syscall_return_slowpath+0x2ac/0x550 [ 29.398339] ? prepare_exit_to_usermode+0x350/0x350 [ 29.403331] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 29.408671] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.413495] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 29.418655] RIP: 0033:0x441ca9 [ 29.421821] RSP: 002b:00000000007dfe98 EFLAGS: 00000212 ORIG_RAX: 000000000000002c [ 29.429504] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000441ca9 [ 29.436746] RDX: 0000000000000000 RSI: 0000000020001180 RDI: 0000000000000004 [ 29.443987] RBP: 00000000004a3cc6 R08: 00000000200021c0 R09: 0000000000000080 [ 29.451242] R10: 0000000000040001 R11: 0000000000000212 R12: 00000000007dff70 [ 29.458484] R13: 0000000000402ce0 R14: 0000000000000000 R15: 0000000000000000 [ 29.465740] [ 29.467343] Allocated by task 0: [ 29.470677] (stack is not available) [ 29.474357] [ 29.475954] Freed by task 0: [ 29.478940] (stack is not available) [ 29.482620] [ 29.484223] The buggy address belongs to the object at ffff8801b0cfc100 [ 29.484223] which belongs to the cache ip_dst_cache of size 160 [ 29.496935] The buggy address is located 24 bytes inside of [ 29.496935] 160-byte region [ffff8801b0cfc100, ffff8801b0cfc1a0) [ 29.508690] The buggy address belongs to the page: [ 29.513600] page:ffffea0006c33f00 count:1 mapcount:0 mapping:ffff8801b0cfc000 index:0x0 [ 29.521714] flags: 0x2fffc0000000100(slab) [ 29.525923] raw: 02fffc0000000100 ffff8801b0cfc000 0000000000000000 0000000100000010 [ 29.533775] raw: ffffea0006cb6fa0 ffff8801d5bbb948 ffff8801d5bba4c0 0000000000000000 [ 29.541625] page dumped because: kasan: bad access detected [ 29.547307] [ 29.548903] Memory state around the buggy address: [ 29.554150] ffff8801b0cfc000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.561479] ffff8801b0cfc080: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc [ 29.568818] >ffff8801b0cfc100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.576148] ^ [ 29.580272] ffff8801b0cfc180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.587599] ffff8801b0cfc200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.594927] ================================================================== [ 29.602255] Disabling lock debugging due to kernel taint [ 29.607726] Kernel panic - not syncing: panic_on_warn set ... [ 29.607726] [ 29.615080] CPU: 0 PID: 4243 Comm: syzkaller624649 Tainted: G B 4.16.0-rc4+ #260 [ 29.623802] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.633125] Call Trace: [ 29.635691] dump_stack+0x194/0x24d [ 29.639290] ? arch_local_irq_restore+0x53/0x53 [ 29.643932] ? kasan_end_report+0x32/0x50 [ 29.648055] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 29.652781] ? vsnprintf+0x1ed/0x1900 [ 29.656560] ? ip6_xmit+0x1eb0/0x2260 [ 29.660334] panic+0x1e4/0x41c [ 29.663498] ? refcount_error_report+0x214/0x214 [ 29.668225] ? add_taint+0x1c/0x50 [ 29.671743] ? add_taint+0x1c/0x50 [ 29.675255] ? ip6_xmit+0x1f76/0x2260 [ 29.679030] kasan_end_report+0x50/0x50 [ 29.682973] kasan_report+0x149/0x360 [ 29.686745] __asan_report_load8_noabort+0x14/0x20 [ 29.691656] ip6_xmit+0x1f76/0x2260 [ 29.695260] ? ip6_finish_output2+0x23d0/0x23d0 [ 29.699903] ? fl6_update_dst+0x127/0x2b0 [ 29.704029] ? inet6_csk_route_socket+0x691/0xe80 [ 29.708847] ? trace_hardirqs_off+0x10/0x10 [ 29.713728] ? lock_acquire+0x1d5/0x580 [ 29.717673] ? lock_acquire+0x1d5/0x580 [ 29.721621] ? inet6_csk_xmit+0x114/0x580 [ 29.725739] ? trace_hardirqs_off+0x10/0x10 [ 29.730034] ? lock_release+0xa40/0xa40 [ 29.733988] inet6_csk_xmit+0x2fc/0x580 [ 29.737938] ? inet6_csk_update_pmtu+0x160/0x160 [ 29.742666] ? __sk_dst_check+0x1a5/0x380 [ 29.746787] ? sock_kzfree_s+0x60/0x60 [ 29.750657] l2tp_xmit_skb+0x105f/0x1410 [ 29.754695] ? l2tp_session_create+0xb80/0xb80 [ 29.759250] ? sock_wmalloc+0x15d/0x1d0 [ 29.763200] ? iov_iter_advance+0x13f0/0x13f0 [ 29.767671] ? pppol2tp_sendmsg+0x41b/0x670 [ 29.771964] pppol2tp_sendmsg+0x470/0x670 [ 29.776087] ? selinux_socket_sendmsg+0x36/0x40 [ 29.780728] ? pppol2tp_getsockopt+0x900/0x900 [ 29.785282] sock_sendmsg+0xca/0x110 [ 29.788968] SYSC_sendto+0x361/0x5c0 [ 29.792663] ? SYSC_connect+0x4a0/0x4a0 [ 29.796625] ? inet_dgram_connect+0x172/0x1f0 [ 29.801103] ? SYSC_connect+0x2e0/0x4a0 [ 29.818708] ? mm_fault_error+0x2c0/0x2c0 [ 29.822830] ? move_addr_to_kernel+0x60/0x60 [ 29.827213] SyS_sendto+0x40/0x50 [ 29.830636] ? SyS_getpeername+0x30/0x30 [ 29.834672] do_syscall_64+0x281/0x940 [ 29.838530] ? __do_page_fault+0xc90/0xc90 [ 29.842737] ? _raw_spin_unlock_irq+0x27/0x70 [ 29.847204] ? finish_task_switch+0x1c1/0x7e0 [ 29.851670] ? syscall_return_slowpath+0x550/0x550 [ 29.856569] ? syscall_return_slowpath+0x2ac/0x550 [ 29.861471] ? prepare_exit_to_usermode+0x350/0x350 [ 29.866461] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 29.871805] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.876623] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 29.881784] RIP: 0033:0x441ca9 [ 29.884952] RSP: 002b:00000000007dfe98 EFLAGS: 00000212 ORIG_RAX: 000000000000002c [ 29.892631] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000441ca9 [ 29.899885] RDX: 0000000000000000 RSI: 0000000020001180 RDI: 0000000000000004 [ 29.907128] RBP: 00000000004a3cc6 R08: 00000000200021c0 R09: 0000000000000080 [ 29.914371] R10: 0000000000040001 R11: 0000000000000212 R12: 00000000007dff70 [ 29.921613] R13: 0000000000402ce0 R14: 0000000000000000 R15: 0000000000000000 [ 29.929367] Dumping ftrace buffer: [ 29.932878] (ftrace buffer empty) [ 29.936560] Kernel Offset: disabled [ 29.940158] Rebooting in 86400 seconds..