[....] Starting enhanced syslogd: rsyslogd[ 16.915286] audit: type=1400 audit(1520392058.715:5): avc: denied { syslog } for pid=4118 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: [ 22.725796] audit: type=1400 audit(1520392064.525:6): avc: denied { map } for pid=4257 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 '10.128.0.5' (ECDSA) to the list of known hosts. [ 30.958236] audit: type=1400 audit(1520392072.758:7): avc: denied { map } for pid=4271 comm="syzkaller855974" path="/root/syzkaller855974966" 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 [ 30.970118] IPVS: ftp: loaded support on port[0] = 21 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 30.984198] audit: type=1400 audit(1520392072.758:8): avc: denied { sys_admin } for pid=4271 comm="syzkaller855974" 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 [ 31.017713] audit: type=1400 audit(1520392072.817:9): avc: denied { net_admin } for pid=4272 comm="syzkaller855974" 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 [ 31.258882] 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 [ 31.615193] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 31.621294] 8021q: adding VLAN 0 to HW filter on device bond0 executing program [ 31.658328] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 31.697148] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 31.711558] audit: type=1400 audit(1520392073.511:10): avc: denied { sys_chroot } for pid=4272 comm="syzkaller855974" 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 [ 31.716326] ================================================================== [ 31.743531] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 31.750006] Read of size 8 at addr ffff8801c3a03518 by task syzkaller855974/4272 [ 31.757516] [ 31.759119] CPU: 1 PID: 4272 Comm: syzkaller855974 Not tainted 4.16.0-rc4+ #343 [ 31.766540] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.775863] Call Trace: [ 31.778424] dump_stack+0x194/0x24d [ 31.782037] ? arch_local_irq_restore+0x53/0x53 [ 31.786687] ? show_regs_print_info+0x18/0x18 [ 31.791181] ? ip6_xmit+0x1f76/0x2260 [ 31.794967] print_address_description+0x73/0x250 [ 31.799792] ? ip6_xmit+0x1f76/0x2260 [ 31.803577] kasan_report+0x23c/0x360 [ 31.807357] __asan_report_load8_noabort+0x14/0x20 [ 31.812262] ip6_xmit+0x1f76/0x2260 [ 31.815892] ? ip6_finish_output2+0x23a0/0x23a0 [ 31.820545] ? fl6_update_dst+0x127/0x2b0 [ 31.824684] ? inet6_csk_route_socket+0x691/0xe80 [ 31.829512] ? trace_hardirqs_off+0x10/0x10 [ 31.833817] ? lock_acquire+0x1d5/0x580 [ 31.837774] ? lock_acquire+0x1d5/0x580 [ 31.841722] ? inet6_csk_xmit+0x114/0x580 [ 31.845855] ? trace_hardirqs_off+0x10/0x10 [ 31.850161] ? lock_release+0xa40/0xa40 [ 31.854141] inet6_csk_xmit+0x2fc/0x580 [ 31.858095] ? inet6_csk_update_pmtu+0x160/0x160 [ 31.862827] ? __sk_dst_check+0x1a5/0x380 [ 31.866957] ? sock_kfree_s+0x60/0x60 [ 31.870750] l2tp_xmit_skb+0x105f/0x1410 [ 31.874798] ? l2tp_session_create+0xb80/0xb80 [ 31.879366] ? sock_wmalloc+0x15d/0x1d0 [ 31.883315] ? iov_iter_advance+0x13f0/0x13f0 [ 31.887787] ? pppol2tp_sendmsg+0x41b/0x670 [ 31.892094] pppol2tp_sendmsg+0x470/0x670 [ 31.896230] ? selinux_socket_sendmsg+0x36/0x40 [ 31.900883] ? pppol2tp_getsockopt+0x900/0x900 [ 31.905442] sock_sendmsg+0xca/0x110 [ 31.909137] ___sys_sendmsg+0x767/0x8b0 [ 31.913091] ? copy_msghdr_from_user+0x590/0x590 [ 31.917837] ? __pmd_alloc+0x4e0/0x4e0 [ 31.921719] ? selinux_socket_connect+0x311/0x730 [ 31.926546] ? trace_hardirqs_off+0x10/0x10 [ 31.930845] ? find_held_lock+0x35/0x1d0 [ 31.934898] ? __fget_light+0x2b2/0x3c0 [ 31.938864] ? fget_raw+0x20/0x20 [ 31.942316] ? __do_page_fault+0x5f7/0xc90 [ 31.946526] ? lock_downgrade+0x980/0x980 [ 31.950667] __sys_sendmsg+0xe5/0x210 [ 31.954448] ? __sys_sendmsg+0xe5/0x210 [ 31.958400] ? SyS_shutdown+0x290/0x290 [ 31.962357] ? __do_page_fault+0x3d6/0xc90 [ 31.966576] ? move_addr_to_kernel+0x60/0x60 [ 31.970967] SyS_sendmsg+0x2d/0x50 [ 31.974481] ? __sys_sendmsg+0x210/0x210 [ 31.978519] do_syscall_64+0x281/0x940 [ 31.982378] ? __do_page_fault+0xc90/0xc90 [ 31.986588] ? _raw_spin_unlock_irq+0x27/0x70 [ 31.991058] ? finish_task_switch+0x1c1/0x7e0 [ 31.995526] ? syscall_return_slowpath+0x550/0x550 [ 32.000429] ? syscall_return_slowpath+0x2ac/0x550 [ 32.005330] ? prepare_exit_to_usermode+0x350/0x350 [ 32.010319] ? retint_user+0x18/0x18 [ 32.014015] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.018845] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 32.024006] RIP: 0033:0x442fd9 [ 32.027175] RSP: 002b:00000000007efe98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 32.034852] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000442fd9 [ 32.042093] RDX: 0000000000000081 RSI: 000000002037ffc8 RDI: 0000000000000004 [ 32.049337] RBP: 00000000004a4e79 R08: 0000000000000019 R09: 0000000000000019 [ 32.056575] R10: 0000000000000019 R11: 0000000000000246 R12: 00000000007eff70 [ 32.063815] R13: 0000000000404010 R14: 0000000000000000 R15: 0000000000000000 [ 32.071069] [ 32.072667] Allocated by task 0: [ 32.076000] (stack is not available) [ 32.079687] [ 32.081286] Freed by task 0: [ 32.084272] (stack is not available) [ 32.087953] [ 32.089553] The buggy address belongs to the object at ffff8801c3a03500 [ 32.089553] which belongs to the cache ip_dst_cache of size 168 [ 32.102263] The buggy address is located 24 bytes inside of [ 32.102263] 168-byte region [ffff8801c3a03500, ffff8801c3a035a8) [ 32.114022] The buggy address belongs to the page: [ 32.118929] page:ffffea00070e80c0 count:1 mapcount:0 mapping:ffff8801c3a03000 index:0xffff8801c3a03000 [ 32.128342] flags: 0x2fffc0000000100(slab) [ 32.132648] raw: 02fffc0000000100 ffff8801c3a03000 ffff8801c3a03000 000000010000000d [ 32.140509] raw: ffff8801d6bbf238 ffff8801d6bbf238 ffff8801d5bb3680 0000000000000000 [ 32.148356] page dumped because: kasan: bad access detected [ 32.154039] [ 32.155635] Memory state around the buggy address: [ 32.160533] ffff8801c3a03400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.167863] ffff8801c3a03480: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 32.175192] >ffff8801c3a03500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.182517] ^ [ 32.186636] ffff8801c3a03580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.193965] ffff8801c3a03600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.201305] ================================================================== [ 32.208720] Disabling lock debugging due to kernel taint [ 32.214162] Kernel panic - not syncing: panic_on_warn set ... [ 32.214162] [ 32.221503] CPU: 1 PID: 4272 Comm: syzkaller855974 Tainted: G B 4.16.0-rc4+ #343 [ 32.230219] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.239542] Call Trace: [ 32.242107] dump_stack+0x194/0x24d [ 32.245706] ? arch_local_irq_restore+0x53/0x53 [ 32.250343] ? kasan_end_report+0x32/0x50 [ 32.254462] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 32.259185] ? vsnprintf+0x1ed/0x1900 [ 32.262957] ? ip6_xmit+0x1f30/0x2260 [ 32.266727] panic+0x1e4/0x41c [ 32.269889] ? refcount_error_report+0x214/0x214 [ 32.274624] ? add_taint+0x1c/0x50 [ 32.278150] ? add_taint+0x1c/0x50 [ 32.281685] ? ip6_xmit+0x1f76/0x2260 [ 32.285465] kasan_end_report+0x50/0x50 [ 32.289414] kasan_report+0x149/0x360 [ 32.293187] __asan_report_load8_noabort+0x14/0x20 [ 32.298089] ip6_xmit+0x1f76/0x2260 [ 32.301696] ? ip6_finish_output2+0x23a0/0x23a0 [ 32.306334] ? fl6_update_dst+0x127/0x2b0 [ 32.310451] ? inet6_csk_route_socket+0x691/0xe80 [ 32.315264] ? trace_hardirqs_off+0x10/0x10 [ 32.319555] ? lock_acquire+0x1d5/0x580 [ 32.323496] ? lock_acquire+0x1d5/0x580 [ 32.327439] ? inet6_csk_xmit+0x114/0x580 [ 32.331554] ? trace_hardirqs_off+0x10/0x10 [ 32.335847] ? lock_release+0xa40/0xa40 [ 32.339800] inet6_csk_xmit+0x2fc/0x580 [ 32.343745] ? inet6_csk_update_pmtu+0x160/0x160 [ 32.348474] ? __sk_dst_check+0x1a5/0x380 [ 32.352595] ? sock_kfree_s+0x60/0x60 [ 32.356379] l2tp_xmit_skb+0x105f/0x1410 [ 32.360416] ? l2tp_session_create+0xb80/0xb80 [ 32.364969] ? sock_wmalloc+0x15d/0x1d0 [ 32.368912] ? iov_iter_advance+0x13f0/0x13f0 [ 32.373376] ? pppol2tp_sendmsg+0x41b/0x670 [ 32.377680] pppol2tp_sendmsg+0x470/0x670 [ 32.381806] ? selinux_socket_sendmsg+0x36/0x40 [ 32.386446] ? pppol2tp_getsockopt+0x900/0x900 [ 32.391005] sock_sendmsg+0xca/0x110 [ 32.394703] ___sys_sendmsg+0x767/0x8b0 [ 32.398666] ? copy_msghdr_from_user+0x590/0x590 [ 32.403405] ? __pmd_alloc+0x4e0/0x4e0 [ 32.407263] ? selinux_socket_connect+0x311/0x730 [ 32.412078] ? trace_hardirqs_off+0x10/0x10 [ 32.416369] ? find_held_lock+0x35/0x1d0 [ 32.420401] ? __fget_light+0x2b2/0x3c0 [ 32.424348] ? fget_raw+0x20/0x20 [ 32.427778] ? __do_page_fault+0x5f7/0xc90 [ 32.431981] ? lock_downgrade+0x980/0x980 [ 32.436102] __sys_sendmsg+0xe5/0x210 [ 32.439871] ? __sys_sendmsg+0xe5/0x210 [ 32.443815] ? SyS_shutdown+0x290/0x290 [ 32.447763] ? __do_page_fault+0x3d6/0xc90 [ 32.451969] ? move_addr_to_kernel+0x60/0x60 [ 32.456349] SyS_sendmsg+0x2d/0x50 [ 32.459857] ? __sys_sendmsg+0x210/0x210 [ 32.463889] do_syscall_64+0x281/0x940 [ 32.467743] ? __do_page_fault+0xc90/0xc90 [ 32.471945] ? _raw_spin_unlock_irq+0x27/0x70 [ 32.476408] ? finish_task_switch+0x1c1/0x7e0 [ 32.480872] ? syscall_return_slowpath+0x550/0x550 [ 32.485769] ? syscall_return_slowpath+0x2ac/0x550 [ 32.490668] ? prepare_exit_to_usermode+0x350/0x350 [ 32.495666] ? retint_user+0x18/0x18 [ 32.499363] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.504182] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 32.509345] RIP: 0033:0x442fd9 [ 32.512508] RSP: 002b:00000000007efe98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 32.520186] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000442fd9 [ 32.527427] RDX: 0000000000000081 RSI: 000000002037ffc8 RDI: 0000000000000004 [ 32.534666] RBP: 00000000004a4e79 R08: 0000000000000019 R09: 0000000000000019 [ 32.541903] R10: 0000000000000019 R11: 0000000000000246 R12: 00000000007eff70 [ 32.549142] R13: 0000000000404010 R14: 0000000000000000 R15: 0000000000000000 [ 32.556801] Dumping ftrace buffer: [ 32.560314] (ftrace buffer empty) [ 32.563996] Kernel Offset: disabled [ 32.567590] Rebooting in 86400 seconds..