[....] Starting enhanced syslogd: rsyslogd[ 17.831504] audit: type=1400 audit(1520959211.712:5): avc: denied { syslog } for pid=4122 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: [ 22.331915] audit: type=1400 audit(1520959216.212:6): avc: denied { map } for pid=4262 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 '10.128.0.54' (ECDSA) to the list of known hosts. [ 34.456767] audit: type=1400 audit(1520959228.337:7): avc: denied { map } for pid=4277 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 2018/03/13 16:40:28 parsed 1 programs 2018/03/13 16:40:28 executed programs: 0 [ 34.702314] audit: type=1400 audit(1520959228.582:8): avc: denied { map } for pid=4277 comm="syz-execprog" path="/root/syzkaller-shm810882388" 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 [ 34.722558] IPVS: ftp: loaded support on port[0] = 21 [ 35.012807] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 35.399363] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 35.405482] 8021q: adding VLAN 0 to HW filter on device bond0 [ 35.446510] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 35.487967] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 35.505887] ================================================================== [ 35.513323] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 35.519787] Read of size 8 at addr ffff8801afb60218 by task syz-executor0/4444 [ 35.527120] [ 35.528727] CPU: 0 PID: 4444 Comm: syz-executor0 Not tainted 4.16.0-rc5+ #262 [ 35.535972] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.545297] Call Trace: [ 35.547863] dump_stack+0x194/0x24d [ 35.551466] ? arch_local_irq_restore+0x53/0x53 [ 35.556113] ? show_regs_print_info+0x18/0x18 [ 35.560588] ? ip6_xmit+0x1f76/0x2260 [ 35.564362] print_address_description+0x73/0x250 [ 35.569176] ? ip6_xmit+0x1f76/0x2260 [ 35.572953] kasan_report+0x23c/0x360 [ 35.576731] __asan_report_load8_noabort+0x14/0x20 [ 35.581632] ip6_xmit+0x1f76/0x2260 [ 35.585245] ? ip6_finish_output2+0x23a0/0x23a0 [ 35.589888] ? fl6_update_dst+0x127/0x2b0 [ 35.594012] ? inet6_csk_route_socket+0x691/0xe80 [ 35.598832] ? trace_hardirqs_off+0x10/0x10 [ 35.603126] ? lock_acquire+0x1d5/0x580 [ 35.607070] ? lock_acquire+0x1d5/0x580 [ 35.611014] ? inet6_csk_xmit+0x114/0x580 [ 35.615141] ? trace_hardirqs_off+0x10/0x10 [ 35.619437] ? lock_release+0xa40/0xa40 [ 35.623398] inet6_csk_xmit+0x2fc/0x580 [ 35.627351] ? inet6_csk_update_pmtu+0x160/0x160 [ 35.632078] ? __sk_dst_check+0x1a5/0x380 [ 35.636203] ? sock_kfree_s+0x60/0x60 [ 35.640003] l2tp_xmit_skb+0x105f/0x1410 [ 35.644061] ? l2tp_session_create+0xb80/0xb80 [ 35.648632] ? sock_wmalloc+0x15d/0x1d0 [ 35.652593] ? iov_iter_advance+0x13f0/0x13f0 [ 35.657072] ? pppol2tp_sendmsg+0x41b/0x670 [ 35.661370] pppol2tp_sendmsg+0x470/0x670 [ 35.665497] ? selinux_socket_sendmsg+0x36/0x40 [ 35.670151] ? pppol2tp_getsockopt+0x900/0x900 [ 35.674705] sock_sendmsg+0xca/0x110 [ 35.678393] SYSC_sendto+0x361/0x5c0 [ 35.682083] ? SYSC_connect+0x4a0/0x4a0 [ 35.686035] ? find_held_lock+0x35/0x1d0 [ 35.690077] ? lock_downgrade+0x980/0x980 [ 35.694221] ? __do_page_fault+0x3d6/0xc90 [ 35.698439] SyS_sendto+0x40/0x50 [ 35.701869] ? SyS_getpeername+0x30/0x30 [ 35.705906] do_fast_syscall_32+0x3ec/0xf9f [ 35.710211] ? do_int80_syscall_32+0x9c0/0x9c0 [ 35.714766] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 35.719500] ? syscall_return_slowpath+0x2ac/0x550 [ 35.724404] ? prepare_exit_to_usermode+0x350/0x350 [ 35.729396] ? sysret32_from_system_call+0x5/0x3c [ 35.734227] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.739049] entry_SYSENTER_compat+0x70/0x7f [ 35.743434] RIP: 0023:0xf7f71c99 [ 35.746769] RSP: 002b:00000000ff9a24ac EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 35.754448] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001180 [ 35.761694] RDX: 0000000000000000 RSI: 0000000000040001 RDI: 00000000200021c0 [ 35.768945] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 35.776195] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 35.783446] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 35.790710] [ 35.792320] Allocated by task 0: [ 35.795660] (stack is not available) [ 35.799345] [ 35.800946] Freed by task 0: [ 35.803930] (stack is not available) [ 35.807609] [ 35.809216] The buggy address belongs to the object at ffff8801afb60200 [ 35.809216] which belongs to the cache ip_dst_cache of size 168 [ 35.821930] The buggy address is located 24 bytes inside of [ 35.821930] 168-byte region [ffff8801afb60200, ffff8801afb602a8) [ 35.833694] The buggy address belongs to the page: [ 35.838609] page:ffffea0006bed800 count:1 mapcount:0 mapping:ffff8801afb60000 index:0xffff8801afb60c00 [ 35.848029] flags: 0x2fffc0000000100(slab) [ 35.852243] raw: 02fffc0000000100 ffff8801afb60000 ffff8801afb60c00 0000000100000009 [ 35.860092] raw: ffff8801d5434f38 ffffea0006bd72a0 ffff8801d541fe00 0000000000000000 [ 35.867964] page dumped because: kasan: bad access detected [ 35.873650] [ 35.875249] Memory state around the buggy address: [ 35.880149] ffff8801afb60100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.887479] ffff8801afb60180: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 35.894807] >ffff8801afb60200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.902137] ^ [ 35.906256] ffff8801afb60280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.913583] ffff8801afb60300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.920912] ================================================================== [ 35.928246] Disabling lock debugging due to kernel taint [ 35.933724] Kernel panic - not syncing: panic_on_warn set ... [ 35.933724] [ 35.941068] CPU: 0 PID: 4444 Comm: syz-executor0 Tainted: G B 4.16.0-rc5+ #262 [ 35.949620] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.958953] Call Trace: [ 35.961523] dump_stack+0x194/0x24d [ 35.965125] ? arch_local_irq_restore+0x53/0x53 [ 35.969765] ? kasan_end_report+0x32/0x50 [ 35.973898] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 35.978624] ? vsnprintf+0x1ed/0x1900 [ 35.982417] ? ip6_xmit+0x1f30/0x2260 [ 35.986194] panic+0x1e4/0x41c [ 35.989357] ? refcount_error_report+0x214/0x214 [ 35.994097] ? add_taint+0x1c/0x50 [ 35.997609] ? add_taint+0x1c/0x50 [ 36.001121] ? ip6_xmit+0x1f76/0x2260 [ 36.004892] kasan_end_report+0x50/0x50 [ 36.008839] kasan_report+0x149/0x360 [ 36.012612] __asan_report_load8_noabort+0x14/0x20 [ 36.017511] ip6_xmit+0x1f76/0x2260 [ 36.021118] ? ip6_finish_output2+0x23a0/0x23a0 [ 36.025759] ? fl6_update_dst+0x127/0x2b0 [ 36.029885] ? inet6_csk_route_socket+0x691/0xe80 [ 36.034698] ? trace_hardirqs_off+0x10/0x10 [ 36.038991] ? lock_acquire+0x1d5/0x580 [ 36.042936] ? lock_acquire+0x1d5/0x580 [ 36.046878] ? inet6_csk_xmit+0x114/0x580 [ 36.050998] ? trace_hardirqs_off+0x10/0x10 [ 36.055290] ? lock_release+0xa40/0xa40 [ 36.059246] inet6_csk_xmit+0x2fc/0x580 [ 36.063190] ? inet6_csk_update_pmtu+0x160/0x160 [ 36.067917] ? __sk_dst_check+0x1a5/0x380 [ 36.072036] ? sock_kfree_s+0x60/0x60 [ 36.075817] l2tp_xmit_skb+0x105f/0x1410 [ 36.079853] ? l2tp_session_create+0xb80/0xb80 [ 36.084408] ? sock_wmalloc+0x15d/0x1d0 [ 36.088371] ? iov_iter_advance+0x13f0/0x13f0 [ 36.092840] ? pppol2tp_sendmsg+0x41b/0x670 [ 36.097134] pppol2tp_sendmsg+0x470/0x670 [ 36.101258] ? selinux_socket_sendmsg+0x36/0x40 [ 36.105901] ? pppol2tp_getsockopt+0x900/0x900 [ 36.110456] sock_sendmsg+0xca/0x110 [ 36.114140] SYSC_sendto+0x361/0x5c0 [ 36.117827] ? SYSC_connect+0x4a0/0x4a0 [ 36.121778] ? find_held_lock+0x35/0x1d0 [ 36.125813] ? lock_downgrade+0x980/0x980 [ 36.130097] ? __do_page_fault+0x3d6/0xc90 [ 36.134311] SyS_sendto+0x40/0x50 [ 36.137741] ? SyS_getpeername+0x30/0x30 [ 36.141776] do_fast_syscall_32+0x3ec/0xf9f [ 36.146072] ? do_int80_syscall_32+0x9c0/0x9c0 [ 36.150629] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 36.155357] ? syscall_return_slowpath+0x2ac/0x550 [ 36.160255] ? prepare_exit_to_usermode+0x350/0x350 [ 36.165242] ? sysret32_from_system_call+0x5/0x3c [ 36.170064] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.174880] entry_SYSENTER_compat+0x70/0x7f [ 36.179260] RIP: 0023:0xf7f71c99 [ 36.182592] RSP: 002b:00000000ff9a24ac EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 36.190268] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001180 [ 36.197507] RDX: 0000000000000000 RSI: 0000000000040001 RDI: 00000000200021c0 [ 36.204749] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 36.211994] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 36.219493] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 36.227317] Dumping ftrace buffer: [ 36.230825] (ftrace buffer empty) [ 36.234616] Kernel Offset: disabled [ 36.238221] Rebooting in 86400 seconds..