[....] Starting enhanced syslogd: rsyslogd[ 18.655283] audit: type=1400 audit(1520961264.814:5): avc: denied { syslog } for pid=4099 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: [ 23.894578] audit: type=1400 audit(1520961270.053:6): avc: denied { map } for pid=4240 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 '10.128.0.46' (ECDSA) to the list of known hosts. [ 30.205890] audit: type=1400 audit(1520961276.364:7): avc: denied { map } for pid=4254 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 17:14:36 parsed 1 programs 2018/03/13 17:14:36 executed programs: 0 [ 30.439603] audit: type=1400 audit(1520961276.598:8): avc: denied { map } for pid=4254 comm="syz-execprog" path="/root/syzkaller-shm545653810" 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 [ 30.451745] IPVS: ftp: loaded support on port[0] = 21 [ 30.465241] audit: type=1400 audit(1520961276.605:9): avc: denied { sys_admin } for pid=4259 comm="syz-executor0" 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 [ 30.494663] audit: type=1400 audit(1520961276.647:10): avc: denied { net_admin } for pid=4260 comm="syz-executor0" 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 [ 30.717516] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 31.064641] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 31.070762] 8021q: adding VLAN 0 to HW filter on device bond0 [ 31.110034] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 31.148236] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 31.161554] audit: type=1400 audit(1520961277.320:11): avc: denied { sys_chroot } for pid=4260 comm="syz-executor0" 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 [ 31.171702] ================================================================== [ 31.193330] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 31.199797] Read of size 8 at addr ffff8801bc6c0418 by task syz-executor0/4421 [ 31.207124] [ 31.208729] CPU: 0 PID: 4421 Comm: syz-executor0 Not tainted 4.16.0-rc5+ #262 [ 31.215972] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.225303] Call Trace: [ 31.227867] dump_stack+0x194/0x24d [ 31.231469] ? arch_local_irq_restore+0x53/0x53 [ 31.236111] ? show_regs_print_info+0x18/0x18 [ 31.240583] ? ip6_xmit+0x1f76/0x2260 [ 31.244362] print_address_description+0x73/0x250 [ 31.249181] ? ip6_xmit+0x1f76/0x2260 [ 31.252956] kasan_report+0x23c/0x360 [ 31.256742] __asan_report_load8_noabort+0x14/0x20 [ 31.261648] ip6_xmit+0x1f76/0x2260 [ 31.265262] ? ip6_finish_output2+0x23a0/0x23a0 [ 31.269920] ? fl6_update_dst+0x127/0x2b0 [ 31.274047] ? inet6_csk_route_socket+0x691/0xe80 [ 31.278878] ? trace_hardirqs_off+0x10/0x10 [ 31.283176] ? lock_acquire+0x1d5/0x580 [ 31.287121] ? lock_acquire+0x1d5/0x580 [ 31.291088] ? inet6_csk_xmit+0x114/0x580 [ 31.295212] ? trace_hardirqs_off+0x10/0x10 [ 31.299508] ? lock_release+0xa40/0xa40 [ 31.303471] inet6_csk_xmit+0x2fc/0x580 [ 31.307420] ? inet6_csk_update_pmtu+0x160/0x160 [ 31.312148] ? __sk_dst_check+0x1a5/0x380 [ 31.316273] ? sock_kfree_s+0x60/0x60 [ 31.320080] l2tp_xmit_skb+0x105f/0x1410 [ 31.324124] ? l2tp_session_create+0xb80/0xb80 [ 31.328682] ? sock_wmalloc+0x15d/0x1d0 [ 31.332631] ? iov_iter_advance+0x13f0/0x13f0 [ 31.337102] ? pppol2tp_sendmsg+0x41b/0x670 [ 31.341402] pppol2tp_sendmsg+0x470/0x670 [ 31.345526] ? selinux_socket_sendmsg+0x36/0x40 [ 31.350169] ? pppol2tp_getsockopt+0x900/0x900 [ 31.354735] sock_sendmsg+0xca/0x110 [ 31.358425] SYSC_sendto+0x361/0x5c0 [ 31.362117] ? SYSC_connect+0x4a0/0x4a0 [ 31.366072] ? find_held_lock+0x35/0x1d0 [ 31.370115] ? lock_downgrade+0x980/0x980 [ 31.374270] ? __do_page_fault+0x3d6/0xc90 [ 31.378485] SyS_sendto+0x40/0x50 [ 31.381914] ? SyS_getpeername+0x30/0x30 [ 31.385949] do_fast_syscall_32+0x3ec/0xf9f [ 31.390248] ? do_int80_syscall_32+0x9c0/0x9c0 [ 31.394802] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 31.400315] ? syscall_return_slowpath+0x2ac/0x550 [ 31.405227] ? sysret32_from_system_call+0x5/0x3c [ 31.410047] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.414868] entry_SYSENTER_compat+0x70/0x7f [ 31.419247] RIP: 0023:0xf7f31c99 [ 31.422585] RSP: 002b:000000000844e9cc EFLAGS: 00000202 ORIG_RAX: 0000000000000171 [ 31.430363] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001180 [ 31.437617] RDX: 0000000000000000 RSI: 0000000000040001 RDI: 00000000200021c0 [ 31.444857] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 31.452109] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 31.459352] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 31.466610] [ 31.468222] Allocated by task 0: [ 31.471556] (stack is not available) [ 31.475237] [ 31.476834] Freed by task 0: [ 31.479820] (stack is not available) [ 31.483501] [ 31.485100] The buggy address belongs to the object at ffff8801bc6c0400 [ 31.485100] which belongs to the cache ip_dst_cache of size 168 [ 31.498166] The buggy address is located 24 bytes inside of [ 31.498166] 168-byte region [ffff8801bc6c0400, ffff8801bc6c04a8) [ 31.509928] The buggy address belongs to the page: [ 31.514830] page:ffffea0006f1b000 count:1 mapcount:0 mapping:ffff8801bc6c0000 index:0xffff8801bc6c0000 [ 31.524251] flags: 0x2fffc0000000100(slab) [ 31.528459] raw: 02fffc0000000100 ffff8801bc6c0000 ffff8801bc6c0000 000000010000000f [ 31.536314] raw: ffff8801d6bc8438 ffff8801d6bc8438 ffff8801d5bbc680 0000000000000000 [ 31.544167] page dumped because: kasan: bad access detected [ 31.549846] [ 31.551444] Memory state around the buggy address: [ 31.556830] ffff8801bc6c0300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.564166] ffff8801bc6c0380: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 31.571498] >ffff8801bc6c0400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.578827] ^ [ 31.582946] ffff8801bc6c0480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.590275] ffff8801bc6c0500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.597603] ================================================================== [ 31.604931] Disabling lock debugging due to kernel taint [ 31.610397] Kernel panic - not syncing: panic_on_warn set ... [ 31.610397] [ 31.617730] CPU: 0 PID: 4421 Comm: syz-executor0 Tainted: G B 4.16.0-rc5+ #262 [ 31.626271] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.635593] Call Trace: [ 31.638154] dump_stack+0x194/0x24d [ 31.641751] ? arch_local_irq_restore+0x53/0x53 [ 31.646388] ? kasan_end_report+0x32/0x50 [ 31.650506] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 31.655230] ? vsnprintf+0x1ed/0x1900 [ 31.659007] ? ip6_xmit+0x1f30/0x2260 [ 31.662783] panic+0x1e4/0x41c [ 31.665947] ? refcount_error_report+0x214/0x214 [ 31.670675] ? add_taint+0x1c/0x50 [ 31.674182] ? add_taint+0x1c/0x50 [ 31.677694] ? ip6_xmit+0x1f76/0x2260 [ 31.681463] kasan_end_report+0x50/0x50 [ 31.685407] kasan_report+0x149/0x360 [ 31.689178] __asan_report_load8_noabort+0x14/0x20 [ 31.694078] ip6_xmit+0x1f76/0x2260 [ 31.697681] ? ip6_finish_output2+0x23a0/0x23a0 [ 31.702321] ? fl6_update_dst+0x127/0x2b0 [ 31.706438] ? inet6_csk_route_socket+0x691/0xe80 [ 31.711250] ? trace_hardirqs_off+0x10/0x10 [ 31.715539] ? lock_acquire+0x1d5/0x580 [ 31.719482] ? lock_acquire+0x1d5/0x580 [ 31.723424] ? inet6_csk_xmit+0x114/0x580 [ 31.727542] ? trace_hardirqs_off+0x10/0x10 [ 31.731833] ? lock_release+0xa40/0xa40 [ 31.735783] inet6_csk_xmit+0x2fc/0x580 [ 31.739728] ? inet6_csk_update_pmtu+0x160/0x160 [ 31.744453] ? __sk_dst_check+0x1a5/0x380 [ 31.748569] ? sock_kfree_s+0x60/0x60 [ 31.752348] l2tp_xmit_skb+0x105f/0x1410 [ 31.756382] ? l2tp_session_create+0xb80/0xb80 [ 31.760933] ? sock_wmalloc+0x15d/0x1d0 [ 31.764877] ? iov_iter_advance+0x13f0/0x13f0 [ 31.769343] ? pppol2tp_sendmsg+0x41b/0x670 [ 31.773634] pppol2tp_sendmsg+0x470/0x670 [ 31.777754] ? selinux_socket_sendmsg+0x36/0x40 [ 31.782392] ? pppol2tp_getsockopt+0x900/0x900 [ 31.786942] sock_sendmsg+0xca/0x110 [ 31.790638] SYSC_sendto+0x361/0x5c0 [ 31.794323] ? SYSC_connect+0x4a0/0x4a0 [ 31.798267] ? find_held_lock+0x35/0x1d0 [ 31.802301] ? lock_downgrade+0x980/0x980 [ 31.806442] ? __do_page_fault+0x3d6/0xc90 [ 31.810650] SyS_sendto+0x40/0x50 [ 31.814072] ? SyS_getpeername+0x30/0x30 [ 31.818103] do_fast_syscall_32+0x3ec/0xf9f [ 31.822396] ? do_int80_syscall_32+0x9c0/0x9c0 [ 31.826948] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 31.832458] ? syscall_return_slowpath+0x2ac/0x550 [ 31.837360] ? sysret32_from_system_call+0x5/0x3c [ 31.842175] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.846993] entry_SYSENTER_compat+0x70/0x7f [ 31.851373] RIP: 0023:0xf7f31c99 [ 31.854705] RSP: 002b:000000000844e9cc EFLAGS: 00000202 ORIG_RAX: 0000000000000171 [ 31.862381] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001180 [ 31.869618] RDX: 0000000000000000 RSI: 0000000000040001 RDI: 00000000200021c0 [ 31.876857] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 31.884097] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 31.891335] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 31.898939] Dumping ftrace buffer: [ 31.902448] (ftrace buffer empty) [ 31.906128] Kernel Offset: disabled [ 31.909724] Rebooting in 86400 seconds..