[....] Starting enhanced syslogd: rsyslogd[ 17.032541] audit: type=1400 audit(1521054413.527:5): avc: denied { syslog } for pid=4086 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: [ 23.220606] audit: type=1400 audit(1521054419.716:6): avc: denied { map } for pid=4226 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 '10.128.0.40' (ECDSA) to the list of known hosts. [ 29.598459] audit: type=1400 audit(1521054426.094:7): avc: denied { map } for pid=4240 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=16479 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 2018/03/14 19:07:06 parsed 1 programs 2018/03/14 19:07:06 executed programs: 0 [ 29.851271] audit: type=1400 audit(1521054426.345:8): avc: denied { map } for pid=4240 comm="syz-execprog" path="/root/syzkaller-shm476101694" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 [ 29.863447] IPVS: ftp: loaded support on port[0] = 21 [ 30.153772] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 30.539853] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 30.545960] 8021q: adding VLAN 0 to HW filter on device bond0 [ 30.586155] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 30.626976] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 30.641914] ================================================================== [ 30.649354] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 30.655821] Read of size 8 at addr ffff8801b7d3a218 by task syz-executor0/4405 [ 30.663152] [ 30.664757] CPU: 0 PID: 4405 Comm: syz-executor0 Not tainted 4.16.0-rc5+ #263 [ 30.671999] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.681334] Call Trace: [ 30.683898] dump_stack+0x194/0x24d [ 30.687504] ? arch_local_irq_restore+0x53/0x53 [ 30.692147] ? show_regs_print_info+0x18/0x18 [ 30.696623] ? ip6_xmit+0x1f76/0x2260 [ 30.700416] print_address_description+0x73/0x250 [ 30.705243] ? ip6_xmit+0x1f76/0x2260 [ 30.709028] kasan_report+0x23c/0x360 [ 30.712822] __asan_report_load8_noabort+0x14/0x20 [ 30.717729] ip6_xmit+0x1f76/0x2260 [ 30.721341] ? ip6_finish_output2+0x23a0/0x23a0 [ 30.725985] ? fl6_update_dst+0x127/0x2b0 [ 30.730121] ? inet6_csk_route_socket+0x691/0xe80 [ 30.734948] ? trace_hardirqs_off+0x10/0x10 [ 30.739247] ? lock_acquire+0x1d5/0x580 [ 30.743197] ? lock_acquire+0x1d5/0x580 [ 30.747151] ? inet6_csk_xmit+0x114/0x580 [ 30.751280] ? trace_hardirqs_off+0x10/0x10 [ 30.755587] ? lock_release+0xa40/0xa40 [ 30.759551] inet6_csk_xmit+0x2fc/0x580 [ 30.763501] ? inet6_csk_update_pmtu+0x160/0x160 [ 30.768229] ? __sk_dst_check+0x1a5/0x380 [ 30.772353] ? sock_kfree_s+0x60/0x60 [ 30.776144] l2tp_xmit_skb+0x105f/0x1410 [ 30.780189] ? l2tp_session_create+0xb80/0xb80 [ 30.784745] ? sock_wmalloc+0x15d/0x1d0 [ 30.788693] ? iov_iter_advance+0x13f0/0x13f0 [ 30.793165] ? pppol2tp_sendmsg+0x41b/0x670 [ 30.797462] pppol2tp_sendmsg+0x470/0x670 [ 30.801589] ? selinux_socket_sendmsg+0x36/0x40 [ 30.806238] ? pppol2tp_getsockopt+0x900/0x900 [ 30.810795] sock_sendmsg+0xca/0x110 [ 30.814484] SYSC_sendto+0x361/0x5c0 [ 30.818177] ? SYSC_connect+0x4a0/0x4a0 [ 30.822128] ? find_held_lock+0x35/0x1d0 [ 30.826173] ? lock_downgrade+0x980/0x980 [ 30.830320] ? __do_page_fault+0x3d6/0xc90 [ 30.834526] ? compat_writev+0x420/0x420 [ 30.838580] SyS_sendto+0x40/0x50 [ 30.842015] ? SyS_getpeername+0x30/0x30 [ 30.846064] do_fast_syscall_32+0x3ec/0xf9f [ 30.850380] ? do_int80_syscall_32+0x9c0/0x9c0 [ 30.854943] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.859677] ? syscall_return_slowpath+0x2ac/0x550 [ 30.864581] ? prepare_exit_to_usermode+0x350/0x350 [ 30.869574] ? sysret32_from_system_call+0x5/0x3c [ 30.874397] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.879219] entry_SYSENTER_compat+0x70/0x7f [ 30.883602] RIP: 0023:0xf7fe0c99 [ 30.886938] RSP: 002b:00000000ffcd03ec EFLAGS: 00000286 ORIG_RAX: 0000000000000171 [ 30.894619] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001180 [ 30.901862] RDX: 0000000000000000 RSI: 0000000000040001 RDI: 00000000200021c0 [ 30.909105] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 30.916351] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 30.923598] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 30.930859] [ 30.932460] Allocated by task 0: [ 30.935795] (stack is not available) [ 30.939474] [ 30.941072] Freed by task 0: [ 30.944062] (stack is not available) [ 30.947743] [ 30.949344] The buggy address belongs to the object at ffff8801b7d3a200 [ 30.949344] which belongs to the cache ip_dst_cache of size 168 [ 30.962057] The buggy address is located 24 bytes inside of [ 30.962057] 168-byte region [ffff8801b7d3a200, ffff8801b7d3a2a8) [ 30.973812] The buggy address belongs to the page: [ 30.978717] page:ffffea0006df4e80 count:1 mapcount:0 mapping:ffff8801b7d3a000 index:0x0 [ 30.986834] flags: 0x2fffc0000000100(slab) [ 30.991045] raw: 02fffc0000000100 ffff8801b7d3a000 0000000000000000 0000000100000010 [ 30.998901] raw: ffffea0006ba7d60 ffff8801d5b6ea48 ffff8801d6bcb1c0 0000000000000000 [ 31.006751] page dumped because: kasan: bad access detected [ 31.012428] [ 31.014029] Memory state around the buggy address: [ 31.018936] ffff8801b7d3a100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.026274] ffff8801b7d3a180: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 31.033609] >ffff8801b7d3a200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.040938] ^ [ 31.045058] ffff8801b7d3a280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.052387] ffff8801b7d3a300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.059714] ================================================================== [ 31.067049] Disabling lock debugging due to kernel taint [ 31.072500] Kernel panic - not syncing: panic_on_warn set ... [ 31.072500] [ 31.079849] CPU: 0 PID: 4405 Comm: syz-executor0 Tainted: G B 4.16.0-rc5+ #263 [ 31.088397] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.097723] Call Trace: [ 31.100288] dump_stack+0x194/0x24d [ 31.103887] ? arch_local_irq_restore+0x53/0x53 [ 31.108527] ? kasan_end_report+0x32/0x50 [ 31.112648] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 31.117377] ? vsnprintf+0x1ed/0x1900 [ 31.121152] ? ip6_xmit+0x1f30/0x2260 [ 31.124925] panic+0x1e4/0x41c [ 31.128092] ? refcount_error_report+0x214/0x214 [ 31.132823] ? add_taint+0x1c/0x50 [ 31.136334] ? add_taint+0x1c/0x50 [ 31.139849] ? ip6_xmit+0x1f76/0x2260 [ 31.143623] kasan_end_report+0x50/0x50 [ 31.147567] kasan_report+0x149/0x360 [ 31.151342] __asan_report_load8_noabort+0x14/0x20 [ 31.156249] ip6_xmit+0x1f76/0x2260 [ 31.159852] ? ip6_finish_output2+0x23a0/0x23a0 [ 31.164494] ? fl6_update_dst+0x127/0x2b0 [ 31.168616] ? inet6_csk_route_socket+0x691/0xe80 [ 31.173431] ? trace_hardirqs_off+0x10/0x10 [ 31.177726] ? lock_acquire+0x1d5/0x580 [ 31.181674] ? lock_acquire+0x1d5/0x580 [ 31.185617] ? inet6_csk_xmit+0x114/0x580 [ 31.189737] ? trace_hardirqs_off+0x10/0x10 [ 31.194033] ? lock_release+0xa40/0xa40 [ 31.197988] inet6_csk_xmit+0x2fc/0x580 [ 31.201935] ? inet6_csk_update_pmtu+0x160/0x160 [ 31.206661] ? __sk_dst_check+0x1a5/0x380 [ 31.210786] ? sock_kfree_s+0x60/0x60 [ 31.214569] l2tp_xmit_skb+0x105f/0x1410 [ 31.218608] ? l2tp_session_create+0xb80/0xb80 [ 31.223163] ? sock_wmalloc+0x15d/0x1d0 [ 31.227109] ? iov_iter_advance+0x13f0/0x13f0 [ 31.231575] ? pppol2tp_sendmsg+0x41b/0x670 [ 31.235868] pppol2tp_sendmsg+0x470/0x670 [ 31.239990] ? selinux_socket_sendmsg+0x36/0x40 [ 31.244632] ? pppol2tp_getsockopt+0x900/0x900 [ 31.249188] sock_sendmsg+0xca/0x110 [ 31.252874] SYSC_sendto+0x361/0x5c0 [ 31.256559] ? SYSC_connect+0x4a0/0x4a0 [ 31.260505] ? find_held_lock+0x35/0x1d0 [ 31.264543] ? lock_downgrade+0x980/0x980 [ 31.268673] ? __do_page_fault+0x3d6/0xc90 [ 31.272876] ? compat_writev+0x420/0x420 [ 31.276910] SyS_sendto+0x40/0x50 [ 31.280335] ? SyS_getpeername+0x30/0x30 [ 31.284377] do_fast_syscall_32+0x3ec/0xf9f [ 31.288673] ? do_int80_syscall_32+0x9c0/0x9c0 [ 31.293225] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 31.297959] ? syscall_return_slowpath+0x2ac/0x550 [ 31.302860] ? prepare_exit_to_usermode+0x350/0x350 [ 31.308334] ? sysret32_from_system_call+0x5/0x3c [ 31.313158] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.317976] entry_SYSENTER_compat+0x70/0x7f [ 31.322355] RIP: 0023:0xf7fe0c99 [ 31.325687] RSP: 002b:00000000ffcd03ec EFLAGS: 00000286 ORIG_RAX: 0000000000000171 [ 31.333364] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001180 [ 31.340604] RDX: 0000000000000000 RSI: 0000000000040001 RDI: 00000000200021c0 [ 31.347842] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 31.355081] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 31.362320] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 31.369987] Dumping ftrace buffer: [ 31.373507] (ftrace buffer empty) [ 31.377185] Kernel Offset: disabled [ 31.380783] Rebooting in 86400 seconds..