[....] Starting enhanced syslogd: rsyslogd[ 15.198337] audit: type=1400 audit(1520657520.777:5): avc: denied { syslog } for pid=4041 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: [ 18.336480] audit: type=1400 audit(1520657523.915:6): avc: denied { map } for pid=4181 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 '10.128.0.59' (ECDSA) to the list of known hosts. [ 26.869685] audit: type=1400 audit(1520657532.448:7): avc: denied { map } for pid=4196 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 2018/03/10 04:52:12 parsed 1 programs 2018/03/10 04:52:12 executed programs: 0 [ 27.102106] audit: type=1400 audit(1520657532.680:8): avc: denied { map } for pid=4196 comm="syz-execprog" path="/root/syzkaller-shm976474126" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 [ 27.112179] IPVS: ftp: loaded support on port[0] = 21 [ 27.388385] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 27.793242] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 27.799366] 8021q: adding VLAN 0 to HW filter on device bond0 [ 27.839767] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 27.881296] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 27.896778] ================================================================== [ 27.904289] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 27.910769] Read of size 8 at addr ffff8801c0167118 by task syz-executor0/4362 [ 27.918103] [ 27.919709] CPU: 0 PID: 4362 Comm: syz-executor0 Not tainted 4.16.0-rc4+ #257 [ 27.926951] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.936278] Call Trace: [ 27.938932] dump_stack+0x194/0x24d [ 27.942546] ? arch_local_irq_restore+0x53/0x53 [ 27.947190] ? show_regs_print_info+0x18/0x18 [ 27.951668] ? ip6_xmit+0x1f76/0x2260 [ 27.955452] print_address_description+0x73/0x250 [ 27.960271] ? ip6_xmit+0x1f76/0x2260 [ 27.964046] kasan_report+0x23c/0x360 [ 27.967825] __asan_report_load8_noabort+0x14/0x20 [ 27.972814] ip6_xmit+0x1f76/0x2260 [ 27.976427] ? ip6_finish_output2+0x23a0/0x23a0 [ 27.981073] ? fl6_update_dst+0x127/0x2b0 [ 27.985199] ? inet6_csk_route_socket+0x691/0xe80 [ 27.990020] ? trace_hardirqs_off+0x10/0x10 [ 27.994401] ? lock_acquire+0x1d5/0x580 [ 27.998347] ? lock_acquire+0x1d5/0x580 [ 28.002291] ? inet6_csk_xmit+0x114/0x580 [ 28.007019] ? trace_hardirqs_off+0x10/0x10 [ 28.011317] ? lock_release+0xa40/0xa40 [ 28.015279] inet6_csk_xmit+0x2fc/0x580 [ 28.019232] ? inet6_csk_update_pmtu+0x160/0x160 [ 28.023965] ? __sk_dst_check+0x1a5/0x380 [ 28.028086] ? sock_kfree_s+0x60/0x60 [ 28.031877] l2tp_xmit_skb+0x105f/0x1410 [ 28.035922] ? l2tp_session_create+0xb80/0xb80 [ 28.040488] ? sock_wmalloc+0x15d/0x1d0 [ 28.044435] ? iov_iter_advance+0x13f0/0x13f0 [ 28.048914] ? pppol2tp_sendmsg+0x41b/0x670 [ 28.053211] pppol2tp_sendmsg+0x470/0x670 [ 28.057348] ? selinux_socket_sendmsg+0x36/0x40 [ 28.062002] ? pppol2tp_getsockopt+0x900/0x900 [ 28.066570] sock_sendmsg+0xca/0x110 [ 28.070270] SYSC_sendto+0x361/0x5c0 [ 28.073963] ? SYSC_connect+0x4a0/0x4a0 [ 28.077924] ? find_held_lock+0x35/0x1d0 [ 28.081976] ? lock_downgrade+0x980/0x980 [ 28.086142] ? __do_page_fault+0x3d6/0xc90 [ 28.090368] SyS_sendto+0x40/0x50 [ 28.093809] ? SyS_getpeername+0x30/0x30 [ 28.097849] do_fast_syscall_32+0x3ec/0xf9f [ 28.102149] ? do_int80_syscall_32+0x9c0/0x9c0 [ 28.106888] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 28.111623] ? syscall_return_slowpath+0x2ac/0x550 [ 28.116525] ? prepare_exit_to_usermode+0x350/0x350 [ 28.121518] ? sysret32_from_system_call+0x5/0x3c [ 28.126356] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.131191] entry_SYSENTER_compat+0x70/0x7f [ 28.135576] RIP: 0023:0xf7f7cc99 [ 28.138914] RSP: 002b:00000000ffc97acc EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 28.146692] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020de7000 [ 28.153935] RDX: 0000000000000000 RSI: 00000000a9554f8b RDI: 000000002064eff0 [ 28.161179] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 28.168435] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 28.175687] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 28.182945] [ 28.184554] Allocated by task 0: [ 28.187977] (stack is not available) [ 28.192029] [ 28.193628] Freed by task 0: [ 28.196615] (stack is not available) [ 28.200297] [ 28.201898] The buggy address belongs to the object at ffff8801c0167100 [ 28.201898] which belongs to the cache ip_dst_cache of size 168 [ 28.214615] The buggy address is located 24 bytes inside of [ 28.214615] 168-byte region [ffff8801c0167100, ffff8801c01671a8) [ 28.226375] The buggy address belongs to the page: [ 28.231275] page:ffffea00070059c0 count:1 mapcount:0 mapping:ffff8801c0167000 index:0x0 [ 28.239389] flags: 0x2fffc0000000100(slab) [ 28.243598] raw: 02fffc0000000100 ffff8801c0167000 0000000000000000 0000000100000010 [ 28.251452] raw: ffffea0007382220 ffff8801d5bccc48 ffff8801d6bf4340 0000000000000000 [ 28.259303] page dumped because: kasan: bad access detected [ 28.264983] [ 28.266599] Memory state around the buggy address: [ 28.271501] ffff8801c0167000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.278920] ffff8801c0167080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 28.286263] >ffff8801c0167100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.293600] ^ [ 28.297719] ffff8801c0167180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.305049] ffff8801c0167200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.312377] ================================================================== [ 28.319703] Disabling lock debugging due to kernel taint [ 28.325150] Kernel panic - not syncing: panic_on_warn set ... [ 28.325150] [ 28.332486] CPU: 0 PID: 4362 Comm: syz-executor0 Tainted: G B 4.16.0-rc4+ #257 [ 28.341039] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.350363] Call Trace: [ 28.352925] dump_stack+0x194/0x24d [ 28.356524] ? arch_local_irq_restore+0x53/0x53 [ 28.361164] ? kasan_end_report+0x32/0x50 [ 28.365286] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 28.370013] ? vsnprintf+0x1ed/0x1900 [ 28.373790] ? ip6_xmit+0x1f30/0x2260 [ 28.377568] panic+0x1e4/0x41c [ 28.380736] ? refcount_error_report+0x214/0x214 [ 28.385465] ? add_taint+0x1c/0x50 [ 28.388977] ? add_taint+0x1c/0x50 [ 28.392492] ? ip6_xmit+0x1f76/0x2260 [ 28.396268] kasan_end_report+0x50/0x50 [ 28.400218] kasan_report+0x149/0x360 [ 28.404003] __asan_report_load8_noabort+0x14/0x20 [ 28.408907] ip6_xmit+0x1f76/0x2260 [ 28.412518] ? ip6_finish_output2+0x23a0/0x23a0 [ 28.417160] ? fl6_update_dst+0x127/0x2b0 [ 28.421282] ? inet6_csk_route_socket+0x691/0xe80 [ 28.426109] ? trace_hardirqs_off+0x10/0x10 [ 28.430404] ? lock_acquire+0x1d5/0x580 [ 28.434350] ? lock_acquire+0x1d5/0x580 [ 28.438296] ? inet6_csk_xmit+0x114/0x580 [ 28.442414] ? trace_hardirqs_off+0x10/0x10 [ 28.446708] ? lock_release+0xa40/0xa40 [ 28.450660] inet6_csk_xmit+0x2fc/0x580 [ 28.454608] ? inet6_csk_update_pmtu+0x160/0x160 [ 28.459352] ? __sk_dst_check+0x1a5/0x380 [ 28.463481] ? sock_kfree_s+0x60/0x60 [ 28.467278] l2tp_xmit_skb+0x105f/0x1410 [ 28.471318] ? l2tp_session_create+0xb80/0xb80 [ 28.475964] ? sock_wmalloc+0x15d/0x1d0 [ 28.479913] ? iov_iter_advance+0x13f0/0x13f0 [ 28.484387] ? pppol2tp_sendmsg+0x41b/0x670 [ 28.488683] pppol2tp_sendmsg+0x470/0x670 [ 28.492804] ? selinux_socket_sendmsg+0x36/0x40 [ 28.497458] ? pppol2tp_getsockopt+0x900/0x900 [ 28.502012] sock_sendmsg+0xca/0x110 [ 28.505698] SYSC_sendto+0x361/0x5c0 [ 28.509385] ? SYSC_connect+0x4a0/0x4a0 [ 28.513333] ? find_held_lock+0x35/0x1d0 [ 28.517545] ? lock_downgrade+0x980/0x980 [ 28.521678] ? __do_page_fault+0x3d6/0xc90 [ 28.525897] SyS_sendto+0x40/0x50 [ 28.529322] ? SyS_getpeername+0x30/0x30 [ 28.533353] do_fast_syscall_32+0x3ec/0xf9f [ 28.537649] ? do_int80_syscall_32+0x9c0/0x9c0 [ 28.542201] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 28.546929] ? syscall_return_slowpath+0x2ac/0x550 [ 28.551832] ? prepare_exit_to_usermode+0x350/0x350 [ 28.556823] ? sysret32_from_system_call+0x5/0x3c [ 28.561639] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.566459] entry_SYSENTER_compat+0x70/0x7f [ 28.570846] RIP: 0023:0xf7f7cc99 [ 28.574181] RSP: 002b:00000000ffc97acc EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 28.582380] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020de7000 [ 28.589622] RDX: 0000000000000000 RSI: 00000000a9554f8b RDI: 000000002064eff0 [ 28.596863] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 28.604202] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 28.611449] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 28.619134] Dumping ftrace buffer: [ 28.622648] (ftrace buffer empty) [ 28.626331] Kernel Offset: disabled [ 28.629933] Rebooting in 86400 seconds..