[....] Starting enhanced syslogd: rsyslogd[ 16.971590] audit: type=1400 audit(1521003160.437:5): avc: denied { syslog } for pid=4121 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: [ 19.222645] audit: type=1400 audit(1521003162.688:6): avc: denied { map } for pid=4261 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 '10.128.0.61' (ECDSA) to the list of known hosts. [ 25.529203] audit: type=1400 audit(1521003168.995:7): avc: denied { map } for pid=4275 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 04:52:49 parsed 1 programs 2018/03/14 04:52:49 executed programs: 0 [ 25.786482] audit: type=1400 audit(1521003169.252:8): avc: denied { map } for pid=4275 comm="syz-execprog" path="/root/syzkaller-shm190877058" 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 [ 25.824754] IPVS: ftp: loaded support on port[0] = 21 [ 26.059315] ip (4328) used greatest stack depth: 16248 bytes left [ 26.094288] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 26.461878] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 26.468004] 8021q: adding VLAN 0 to HW filter on device bond0 [ 26.508124] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 26.549781] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 26.566738] ================================================================== [ 26.574195] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 26.580681] Read of size 8 at addr ffff8801cb32d118 by task syz-executor0/4441 [ 26.588022] [ 26.589648] CPU: 0 PID: 4441 Comm: syz-executor0 Not tainted 4.16.0-rc5+ #262 [ 26.596891] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.606217] Call Trace: [ 26.608785] dump_stack+0x194/0x24d [ 26.612389] ? arch_local_irq_restore+0x53/0x53 [ 26.617039] ? show_regs_print_info+0x18/0x18 [ 26.621514] ? ip6_xmit+0x1f76/0x2260 [ 26.625299] print_address_description+0x73/0x250 [ 26.630118] ? ip6_xmit+0x1f76/0x2260 [ 26.633892] kasan_report+0x23c/0x360 [ 26.637685] __asan_report_load8_noabort+0x14/0x20 [ 26.642593] ip6_xmit+0x1f76/0x2260 [ 26.646206] ? ip6_finish_output2+0x23a0/0x23a0 [ 26.650851] ? fl6_update_dst+0x127/0x2b0 [ 26.654993] ? inet6_csk_route_socket+0x691/0xe80 [ 26.659816] ? trace_hardirqs_off+0x10/0x10 [ 26.664111] ? lock_acquire+0x1d5/0x580 [ 26.668062] ? lock_acquire+0x1d5/0x580 [ 26.672017] ? inet6_csk_xmit+0x114/0x580 [ 26.676151] ? trace_hardirqs_off+0x10/0x10 [ 26.680450] ? lock_release+0xa40/0xa40 [ 26.684429] inet6_csk_xmit+0x2fc/0x580 [ 26.688379] ? inet6_csk_update_pmtu+0x160/0x160 [ 26.693114] ? __sk_dst_check+0x1a5/0x380 [ 26.697237] ? sock_kfree_s+0x60/0x60 [ 26.701044] l2tp_xmit_skb+0x105f/0x1410 [ 26.705092] ? l2tp_session_create+0xb80/0xb80 [ 26.709652] ? sock_wmalloc+0x15d/0x1d0 [ 26.713606] ? iov_iter_advance+0x13f0/0x13f0 [ 26.718081] ? pppol2tp_sendmsg+0x41b/0x670 [ 26.722383] pppol2tp_sendmsg+0x470/0x670 [ 26.726509] ? selinux_socket_sendmsg+0x36/0x40 [ 26.731152] ? pppol2tp_getsockopt+0x900/0x900 [ 26.735718] sock_sendmsg+0xca/0x110 [ 26.739413] SYSC_sendto+0x361/0x5c0 [ 26.743104] ? SYSC_connect+0x4a0/0x4a0 [ 26.747056] ? find_held_lock+0x35/0x1d0 [ 26.751101] ? lock_downgrade+0x980/0x980 [ 26.755246] ? __do_page_fault+0x3d6/0xc90 [ 26.759463] SyS_sendto+0x40/0x50 [ 26.762900] ? SyS_getpeername+0x30/0x30 [ 26.766946] do_fast_syscall_32+0x3ec/0xf9f [ 26.771263] ? do_int80_syscall_32+0x9c0/0x9c0 [ 26.775818] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 26.780554] ? syscall_return_slowpath+0x2ac/0x550 [ 26.785463] ? prepare_exit_to_usermode+0x350/0x350 [ 26.790456] ? sysret32_from_system_call+0x5/0x3c [ 26.795277] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.800106] entry_SYSENTER_compat+0x70/0x7f [ 26.804521] RIP: 0023:0xf7fcec99 [ 26.807857] RSP: 002b:00000000fffe53cc EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 26.815541] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001180 [ 26.822788] RDX: 0000000000000000 RSI: 0000000000040001 RDI: 00000000200021c0 [ 26.830037] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 26.837284] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 26.844531] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 26.851804] [ 26.853419] Allocated by task 0: [ 26.856758] (stack is not available) [ 26.860446] [ 26.862059] Freed by task 0: [ 26.865054] (stack is not available) [ 26.868747] [ 26.870357] The buggy address belongs to the object at ffff8801cb32d100 [ 26.870357] which belongs to the cache ip_dst_cache of size 168 [ 26.883077] The buggy address is located 24 bytes inside of [ 26.883077] 168-byte region [ffff8801cb32d100, ffff8801cb32d1a8) [ 26.894840] The buggy address belongs to the page: [ 26.899747] page:ffffea00072ccb40 count:1 mapcount:0 mapping:ffff8801cb32d000 index:0x0 [ 26.908734] flags: 0x2fffc0000000100(slab) [ 26.912965] raw: 02fffc0000000100 ffff8801cb32d000 0000000000000000 0000000100000010 [ 26.920908] raw: ffff8801d6bbc248 ffff8801d6bbc248 ffff8801d5b91680 0000000000000000 [ 26.928762] page dumped because: kasan: bad access detected [ 26.934446] [ 26.936050] Memory state around the buggy address: [ 26.940957] ffff8801cb32d000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.948290] ffff8801cb32d080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 26.955626] >ffff8801cb32d100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.962961] ^ [ 26.967083] ffff8801cb32d180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.974419] ffff8801cb32d200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.981756] ================================================================== [ 26.989090] Disabling lock debugging due to kernel taint [ 26.994542] Kernel panic - not syncing: panic_on_warn set ... [ 26.994542] [ 27.001895] CPU: 0 PID: 4441 Comm: syz-executor0 Tainted: G B 4.16.0-rc5+ #262 [ 27.010451] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.019777] Call Trace: [ 27.022343] dump_stack+0x194/0x24d [ 27.025945] ? arch_local_irq_restore+0x53/0x53 [ 27.030587] ? kasan_end_report+0x32/0x50 [ 27.034725] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 27.039455] ? vsnprintf+0x1ed/0x1900 [ 27.043243] ? ip6_xmit+0x1f30/0x2260 [ 27.047022] panic+0x1e4/0x41c [ 27.050193] ? refcount_error_report+0x214/0x214 [ 27.054924] ? add_taint+0x1c/0x50 [ 27.058438] ? add_taint+0x1c/0x50 [ 27.061953] ? ip6_xmit+0x1f76/0x2260 [ 27.065726] kasan_end_report+0x50/0x50 [ 27.069675] kasan_report+0x149/0x360 [ 27.073451] __asan_report_load8_noabort+0x14/0x20 [ 27.078356] ip6_xmit+0x1f76/0x2260 [ 27.081964] ? ip6_finish_output2+0x23a0/0x23a0 [ 27.086607] ? fl6_update_dst+0x127/0x2b0 [ 27.090738] ? inet6_csk_route_socket+0x691/0xe80 [ 27.095557] ? trace_hardirqs_off+0x10/0x10 [ 27.099850] ? lock_acquire+0x1d5/0x580 [ 27.103794] ? lock_acquire+0x1d5/0x580 [ 27.107742] ? inet6_csk_xmit+0x114/0x580 [ 27.111862] ? trace_hardirqs_off+0x10/0x10 [ 27.116167] ? lock_release+0xa40/0xa40 [ 27.120122] inet6_csk_xmit+0x2fc/0x580 [ 27.124070] ? inet6_csk_update_pmtu+0x160/0x160 [ 27.128798] ? __sk_dst_check+0x1a5/0x380 [ 27.132920] ? sock_kfree_s+0x60/0x60 [ 27.136703] l2tp_xmit_skb+0x105f/0x1410 [ 27.140754] ? l2tp_session_create+0xb80/0xb80 [ 27.145310] ? sock_wmalloc+0x15d/0x1d0 [ 27.149258] ? iov_iter_advance+0x13f0/0x13f0 [ 27.153725] ? pppol2tp_sendmsg+0x41b/0x670 [ 27.158027] pppol2tp_sendmsg+0x470/0x670 [ 27.162154] ? selinux_socket_sendmsg+0x36/0x40 [ 27.166796] ? pppol2tp_getsockopt+0x900/0x900 [ 27.171352] sock_sendmsg+0xca/0x110 [ 27.175047] SYSC_sendto+0x361/0x5c0 [ 27.178752] ? SYSC_connect+0x4a0/0x4a0 [ 27.182713] ? find_held_lock+0x35/0x1d0 [ 27.187117] ? lock_downgrade+0x980/0x980 [ 27.191248] ? __do_page_fault+0x3d6/0xc90 [ 27.195460] SyS_sendto+0x40/0x50 [ 27.198885] ? SyS_getpeername+0x30/0x30 [ 27.202919] do_fast_syscall_32+0x3ec/0xf9f [ 27.207214] ? do_int80_syscall_32+0x9c0/0x9c0 [ 27.211767] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 27.216494] ? syscall_return_slowpath+0x2ac/0x550 [ 27.221395] ? prepare_exit_to_usermode+0x350/0x350 [ 27.226384] ? sysret32_from_system_call+0x5/0x3c [ 27.231200] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.236024] entry_SYSENTER_compat+0x70/0x7f [ 27.240410] RIP: 0023:0xf7fcec99 [ 27.243746] RSP: 002b:00000000fffe53cc EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 27.251423] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001180 [ 27.258662] RDX: 0000000000000000 RSI: 0000000000040001 RDI: 00000000200021c0 [ 27.265903] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 27.273147] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 27.280387] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 27.288137] Dumping ftrace buffer: [ 27.291655] (ftrace buffer empty) [ 27.295337] Kernel Offset: disabled [ 27.298939] Rebooting in 86400 seconds..