[....] Starting enhanced syslogd: rsyslogd[ 17.386781] audit: type=1400 audit(1520962193.034:5): avc: denied { syslog } for pid=4083 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: [ 23.937056] audit: type=1400 audit(1520962199.584:6): avc: denied { map } for pid=4222 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 '10.128.0.15' (ECDSA) to the list of known hosts. [ 30.320265] audit: type=1400 audit(1520962205.967:7): avc: denied { map } for pid=4236 comm="syzkaller263411" path="/root/syzkaller263411323" 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 [ 30.327861] IPVS: ftp: loaded support on port[0] = 21 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 30.346237] audit: type=1400 audit(1520962205.968:8): avc: denied { sys_admin } for pid=4236 comm="syzkaller263411" 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 [ 30.396958] audit: type=1400 audit(1520962206.044:9): avc: denied { net_admin } for pid=4237 comm="syzkaller263411" 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 RTNETLINK answers: Operation not supported [ 30.624757] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 30.960718] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 30.966853] 8021q: adding VLAN 0 to HW filter on device bond0 executing program [ 31.002052] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 31.038789] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 31.050500] audit: type=1400 audit(1520962206.698:10): avc: denied { sys_chroot } for pid=4237 comm="syzkaller263411" 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 [ 31.053347] ================================================================== [ 31.082458] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 31.088920] Read of size 8 at addr ffff8801c8e39418 by task syzkaller263411/4237 [ 31.096425] [ 31.098030] CPU: 0 PID: 4237 Comm: syzkaller263411 Not tainted 4.16.0-rc4+ #263 [ 31.105446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.114774] Call Trace: [ 31.117339] dump_stack+0x194/0x24d [ 31.120944] ? arch_local_irq_restore+0x53/0x53 [ 31.125592] ? show_regs_print_info+0x18/0x18 [ 31.130066] ? ip6_xmit+0x1f76/0x2260 [ 31.133842] print_address_description+0x73/0x250 [ 31.138661] ? ip6_xmit+0x1f76/0x2260 [ 31.142435] kasan_report+0x23c/0x360 [ 31.146213] __asan_report_load8_noabort+0x14/0x20 [ 31.151114] ip6_xmit+0x1f76/0x2260 [ 31.154728] ? ip6_finish_output2+0x23d0/0x23d0 [ 31.159370] ? fl6_update_dst+0x127/0x2b0 [ 31.163498] ? inet6_csk_route_socket+0x691/0xe80 [ 31.168314] ? trace_hardirqs_off+0x10/0x10 [ 31.172606] ? lock_acquire+0x1d5/0x580 [ 31.176550] ? lock_acquire+0x1d5/0x580 [ 31.180495] ? inet6_csk_xmit+0x114/0x580 [ 31.184615] ? trace_hardirqs_off+0x10/0x10 [ 31.188912] ? lock_release+0xa40/0xa40 [ 31.192877] inet6_csk_xmit+0x2fc/0x580 [ 31.196823] ? inet6_csk_update_pmtu+0x160/0x160 [ 31.201554] ? __sk_dst_check+0x1a5/0x380 [ 31.205673] ? sock_kzfree_s+0x60/0x60 [ 31.209546] l2tp_xmit_skb+0x105f/0x1410 [ 31.213588] ? l2tp_session_create+0xb80/0xb80 [ 31.218142] ? sock_wmalloc+0x15d/0x1d0 [ 31.222091] ? iov_iter_advance+0x13f0/0x13f0 [ 31.226564] ? pppol2tp_sendmsg+0x41b/0x670 [ 31.230862] pppol2tp_sendmsg+0x470/0x670 [ 31.234986] ? selinux_socket_sendmsg+0x36/0x40 [ 31.239632] ? pppol2tp_getsockopt+0x900/0x900 [ 31.244189] sock_sendmsg+0xca/0x110 [ 31.247879] SYSC_sendto+0x361/0x5c0 [ 31.251572] ? SYSC_connect+0x4a0/0x4a0 [ 31.255635] ? inet_dgram_connect+0x172/0x1f0 [ 31.260108] ? SYSC_connect+0x2e0/0x4a0 [ 31.264086] ? mm_fault_error+0x2c0/0x2c0 [ 31.268207] ? move_addr_to_kernel+0x60/0x60 [ 31.272591] SyS_sendto+0x40/0x50 [ 31.276018] ? SyS_getpeername+0x30/0x30 [ 31.280056] do_syscall_64+0x281/0x940 [ 31.283914] ? __do_page_fault+0xc90/0xc90 [ 31.288117] ? _raw_spin_unlock_irq+0x27/0x70 [ 31.292586] ? finish_task_switch+0x1c1/0x7e0 [ 31.297054] ? syscall_return_slowpath+0x550/0x550 [ 31.301958] ? syscall_return_slowpath+0x2ac/0x550 [ 31.306862] ? prepare_exit_to_usermode+0x350/0x350 [ 31.311856] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 31.317196] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.322018] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 31.327192] RIP: 0033:0x441c59 [ 31.330353] RSP: 002b:00000000007dfe98 EFLAGS: 00000212 ORIG_RAX: 000000000000002c [ 31.338032] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000441c59 [ 31.345274] RDX: 0000000000000000 RSI: 0000000020001180 RDI: 0000000000000004 [ 31.352516] RBP: 00000000004a3c86 R08: 00000000200021c0 R09: 0000000000000080 [ 31.359760] R10: 0000000000040001 R11: 0000000000000212 R12: 00000000007dff70 [ 31.367005] R13: 0000000000402c90 R14: 0000000000000000 R15: 0000000000000000 [ 31.374265] [ 31.375869] Allocated by task 0: [ 31.379203] (stack is not available) [ 31.382886] [ 31.384483] Freed by task 0: [ 31.387469] (stack is not available) [ 31.391151] [ 31.392753] The buggy address belongs to the object at ffff8801c8e39400 [ 31.392753] which belongs to the cache ip_dst_cache of size 160 [ 31.405468] The buggy address is located 24 bytes inside of [ 31.405468] 160-byte region [ffff8801c8e39400, ffff8801c8e394a0) [ 31.417224] The buggy address belongs to the page: [ 31.422125] page:ffffea0007238e40 count:1 mapcount:0 mapping:ffff8801c8e39000 index:0xffff8801c8e39500 [ 31.431540] flags: 0x2fffc0000000100(slab) [ 31.435752] raw: 02fffc0000000100 ffff8801c8e39000 ffff8801c8e39500 000000010000000c [ 31.443604] raw: ffff8801d6bcf538 ffffea00071fefa0 ffff8801d5b574c0 0000000000000000 [ 31.451453] page dumped because: kasan: bad access detected [ 31.457132] [ 31.458732] Memory state around the buggy address: [ 31.463641] ffff8801c8e39300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.470973] ffff8801c8e39380: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc [ 31.478308] >ffff8801c8e39400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.485638] ^ [ 31.489758] ffff8801c8e39480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.497086] ffff8801c8e39500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.504415] ================================================================== [ 31.511742] Disabling lock debugging due to kernel taint [ 31.517210] Kernel panic - not syncing: panic_on_warn set ... [ 31.517210] [ 31.524546] CPU: 0 PID: 4237 Comm: syzkaller263411 Tainted: G B 4.16.0-rc4+ #263 [ 31.533263] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.542588] Call Trace: [ 31.545153] dump_stack+0x194/0x24d [ 31.548751] ? arch_local_irq_restore+0x53/0x53 [ 31.553391] ? kasan_end_report+0x32/0x50 [ 31.557508] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 31.562234] ? vsnprintf+0x1ed/0x1900 [ 31.566007] ? ip6_xmit+0x1f40/0x2260 [ 31.569778] panic+0x1e4/0x41c [ 31.572940] ? refcount_error_report+0x214/0x214 [ 31.577673] ? add_taint+0x1c/0x50 [ 31.581186] ? add_taint+0x1c/0x50 [ 31.584703] ? ip6_xmit+0x1f76/0x2260 [ 31.588478] kasan_end_report+0x50/0x50 [ 31.592424] kasan_report+0x149/0x360 [ 31.596211] __asan_report_load8_noabort+0x14/0x20 [ 31.601113] ip6_xmit+0x1f76/0x2260 [ 31.604720] ? ip6_finish_output2+0x23d0/0x23d0 [ 31.609359] ? fl6_update_dst+0x127/0x2b0 [ 31.613480] ? inet6_csk_route_socket+0x691/0xe80 [ 31.618296] ? trace_hardirqs_off+0x10/0x10 [ 31.622590] ? lock_acquire+0x1d5/0x580 [ 31.626532] ? lock_acquire+0x1d5/0x580 [ 31.630476] ? inet6_csk_xmit+0x114/0x580 [ 31.634597] ? trace_hardirqs_off+0x10/0x10 [ 31.638893] ? lock_release+0xa40/0xa40 [ 31.642857] inet6_csk_xmit+0x2fc/0x580 [ 31.646802] ? inet6_csk_update_pmtu+0x160/0x160 [ 31.651531] ? __sk_dst_check+0x1a5/0x380 [ 31.655651] ? sock_kzfree_s+0x60/0x60 [ 31.659516] l2tp_xmit_skb+0x105f/0x1410 [ 31.663549] ? l2tp_session_create+0xb80/0xb80 [ 31.668102] ? sock_wmalloc+0x15d/0x1d0 [ 31.672058] ? iov_iter_advance+0x13f0/0x13f0 [ 31.676526] ? pppol2tp_sendmsg+0x41b/0x670 [ 31.680822] pppol2tp_sendmsg+0x470/0x670 [ 31.684952] ? selinux_socket_sendmsg+0x36/0x40 [ 31.689591] ? pppol2tp_getsockopt+0x900/0x900 [ 31.694143] sock_sendmsg+0xca/0x110 [ 31.697839] SYSC_sendto+0x361/0x5c0 [ 31.701524] ? SYSC_connect+0x4a0/0x4a0 [ 31.705472] ? inet_dgram_connect+0x172/0x1f0 [ 31.709937] ? SYSC_connect+0x2e0/0x4a0 [ 31.713911] ? mm_fault_error+0x2c0/0x2c0 [ 31.718033] ? move_addr_to_kernel+0x60/0x60 [ 31.722416] SyS_sendto+0x40/0x50 [ 31.725840] ? SyS_getpeername+0x30/0x30 [ 31.729887] do_syscall_64+0x281/0x940 [ 31.733744] ? __do_page_fault+0xc90/0xc90 [ 31.737949] ? _raw_spin_unlock_irq+0x27/0x70 [ 31.742416] ? finish_task_switch+0x1c1/0x7e0 [ 31.746883] ? syscall_return_slowpath+0x550/0x550 [ 31.751781] ? syscall_return_slowpath+0x2ac/0x550 [ 31.756682] ? prepare_exit_to_usermode+0x350/0x350 [ 31.761670] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 31.767008] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.771823] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 31.776988] RIP: 0033:0x441c59 [ 31.780147] RSP: 002b:00000000007dfe98 EFLAGS: 00000212 ORIG_RAX: 000000000000002c [ 31.787823] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000441c59 [ 31.795064] RDX: 0000000000000000 RSI: 0000000020001180 RDI: 0000000000000004 [ 31.802303] RBP: 00000000004a3c86 R08: 00000000200021c0 R09: 0000000000000080 [ 31.809543] R10: 0000000000040001 R11: 0000000000000212 R12: 00000000007dff70 [ 31.816782] R13: 0000000000402c90 R14: 0000000000000000 R15: 0000000000000000 [ 31.824388] Dumping ftrace buffer: [ 31.827897] (ftrace buffer empty) [ 31.831579] Kernel Offset: disabled [ 31.835177] Rebooting in 86400 seconds..