[....] Starting enhanced syslogd: rsyslogd[ 13.555483] audit: type=1400 audit(1516827473.372:5): avc: denied { syslog } for pid=3513 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 18.040685] audit: type=1400 audit(1516827477.857:6): avc: denied { map } for pid=3653 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 '10.128.0.50' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 26.646466] audit: type=1400 audit(1516827486.463:7): avc: denied { map } for pid=3667 comm="syzkaller904186" path="/root/syzkaller904186359" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 26.672474] audit: type=1400 audit(1516827486.463:8): avc: denied { sys_admin } for pid=3667 comm="syzkaller904186" 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 [ 26.697766] audit: type=1400 audit(1516827486.463:9): avc: denied { net_admin } for pid=3668 comm="syzkaller904186" 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 RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported [ 26.854368] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument executing program [ 27.171514] audit: type=1400 audit(1516827486.988:10): avc: denied { sys_chroot } for pid=3668 comm="syzkaller904186" 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 [ 27.201762] ================================================================== [ 27.209177] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1ce9/0x2090 [ 27.215641] Read of size 8 at addr ffff8801c36bf318 by task syzkaller904186/3668 [ 27.223226] [ 27.224827] CPU: 1 PID: 3668 Comm: syzkaller904186 Not tainted 4.15.0-rc9+ #207 [ 27.232241] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.241561] Call Trace: [ 27.244120] dump_stack+0x194/0x257 [ 27.247738] ? arch_local_irq_restore+0x53/0x53 [ 27.252382] ? show_regs_print_info+0x18/0x18 [ 27.256861] ? ip6_xmit+0x1ce9/0x2090 [ 27.260643] print_address_description+0x73/0x250 [ 27.265457] ? ip6_xmit+0x1ce9/0x2090 [ 27.269228] kasan_report+0x25b/0x340 [ 27.273002] __asan_report_load8_noabort+0x14/0x20 [ 27.277900] ip6_xmit+0x1ce9/0x2090 [ 27.281510] ? ip6_finish_output2+0x23a0/0x23a0 [ 27.286152] ? fl6_update_dst+0x127/0x2b0 [ 27.290272] ? check_noncircular+0x20/0x20 [ 27.294478] ? inet6_csk_route_socket+0x691/0xe80 [ 27.299311] ? lock_acquire+0x1d5/0x580 [ 27.303251] ? lock_acquire+0x1d5/0x580 [ 27.307192] ? inet6_csk_xmit+0x114/0x580 [ 27.311323] ? lock_release+0xa40/0xa40 [ 27.315284] inet6_csk_xmit+0x2fc/0x580 [ 27.319232] ? inet6_csk_update_pmtu+0x160/0x160 [ 27.323959] ? __sk_dst_check+0x1a5/0x380 [ 27.328077] ? sk_wait_data+0x610/0x610 [ 27.332049] l2tp_xmit_skb+0x105f/0x1410 [ 27.336092] ? l2tp_session_create+0xb80/0xb80 [ 27.340645] ? sock_wmalloc+0x15d/0x1d0 [ 27.344591] ? iov_iter_advance+0x13f0/0x13f0 [ 27.349053] ? lock_release+0xa40/0xa40 [ 27.352999] ? pppol2tp_sendmsg+0x41b/0x670 [ 27.357295] pppol2tp_sendmsg+0x470/0x670 [ 27.361418] ? selinux_socket_sendmsg+0x36/0x40 [ 27.366060] ? pppol2tp_session_ioctl+0xa90/0xa90 [ 27.370876] sock_sendmsg+0xca/0x110 [ 27.374563] ___sys_sendmsg+0x320/0x8b0 [ 27.378513] ? copy_msghdr_from_user+0x590/0x590 [ 27.383238] ? __pmd_alloc+0x4e0/0x4e0 [ 27.387113] ? __fget_light+0x297/0x380 [ 27.391056] ? fget_raw+0x20/0x20 [ 27.394479] ? find_held_lock+0x35/0x1d0 [ 27.398517] ? __do_page_fault+0x5f7/0xc90 [ 27.402724] ? lock_downgrade+0x980/0x980 [ 27.406858] __sys_sendmmsg+0x1ee/0x620 [ 27.410805] ? __sys_sendmmsg+0x1ee/0x620 [ 27.414935] ? SyS_sendmsg+0x50/0x50 [ 27.418622] ? mm_fault_error+0x2c0/0x2c0 [ 27.422744] ? SYSC_bind+0x410/0x410 [ 27.426433] ? __do_page_fault+0xc90/0xc90 [ 27.430644] ? sock_map_fd+0x53/0x90 [ 27.434329] ? SyS_socket+0x12d/0x1d0 [ 27.438105] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.443100] SyS_sendmmsg+0x35/0x60 [ 27.446710] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 27.451436] RIP: 0033:0x44e199 [ 27.454596] RSP: 002b:00000000007efdf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 27.462275] RAX: ffffffffffffffda RBX: 00000000004b0010 RCX: 000000000044e199 [ 27.469517] RDX: 0000000000000007 RSI: 00000000204f2e78 RDI: 0000000000000005 [ 27.476759] RBP: 0000000000000068 R08: 00000000004b0010 R09: 00000000004b0010 [ 27.484003] R10: 000000002000c801 R11: 0000000000000246 R12: 0000000000000000 [ 27.491254] R13: 000000000000000a R14: 0000000000000000 R15: 0000000000000000 [ 27.498523] [ 27.500124] Allocated by task 0: [ 27.503459] (stack is not available) [ 27.507142] [ 27.508737] Freed by task 0: [ 27.511723] (stack is not available) [ 27.515410] [ 27.517009] The buggy address belongs to the object at ffff8801c36bf300 [ 27.517009] which belongs to the cache ip_dst_cache of size 168 [ 27.529723] The buggy address is located 24 bytes inside of [ 27.529723] 168-byte region [ffff8801c36bf300, ffff8801c36bf3a8) [ 27.541496] The buggy address belongs to the page: [ 27.546401] page:ffffea00070dafc0 count:1 mapcount:0 mapping:ffff8801c36bf000 index:0x0 [ 27.554516] flags: 0x2fffc0000000100(slab) [ 27.558722] raw: 02fffc0000000100 ffff8801c36bf000 0000000000000000 0000000100000010 [ 27.566572] raw: ffffea0007110560 ffff8801d6f55c48 ffff8801d6f54980 0000000000000000 [ 27.574419] page dumped because: kasan: bad access detected [ 27.580099] [ 27.581695] Memory state around the buggy address: [ 27.586594] ffff8801c36bf200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.593918] ffff8801c36bf280: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 27.601247] >ffff8801c36bf300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.608574] ^ [ 27.612689] ffff8801c36bf380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.620015] ffff8801c36bf400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.627346] ================================================================== [ 27.634670] Disabling lock debugging due to kernel taint [ 27.640122] Kernel panic - not syncing: panic_on_warn set ... [ 27.640122] [ 27.647463] CPU: 1 PID: 3668 Comm: syzkaller904186 Tainted: G B 4.15.0-rc9+ #207 [ 27.656180] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.665501] Call Trace: [ 27.668066] dump_stack+0x194/0x257 [ 27.671667] ? arch_local_irq_restore+0x53/0x53 [ 27.676315] ? kasan_end_report+0x32/0x50 [ 27.680435] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 27.685165] ? vsnprintf+0x1ed/0x1900 [ 27.688941] ? ip6_xmit+0x1cc0/0x2090 [ 27.692714] panic+0x1e4/0x41c [ 27.695876] ? refcount_error_report+0x214/0x214 [ 27.700604] ? add_taint+0x1c/0x50 [ 27.704112] ? add_taint+0x1c/0x50 [ 27.707623] ? ip6_xmit+0x1ce9/0x2090 [ 27.711394] kasan_end_report+0x50/0x50 [ 27.715337] kasan_report+0x144/0x340 [ 27.719109] __asan_report_load8_noabort+0x14/0x20 [ 27.724007] ip6_xmit+0x1ce9/0x2090 [ 27.727607] ? ip6_finish_output2+0x23a0/0x23a0 [ 27.732248] ? fl6_update_dst+0x127/0x2b0 [ 27.736364] ? check_noncircular+0x20/0x20 [ 27.740567] ? inet6_csk_route_socket+0x691/0xe80 [ 27.745391] ? lock_acquire+0x1d5/0x580 [ 27.749331] ? lock_acquire+0x1d5/0x580 [ 27.753273] ? inet6_csk_xmit+0x114/0x580 [ 27.757392] ? lock_release+0xa40/0xa40 [ 27.761343] inet6_csk_xmit+0x2fc/0x580 [ 27.765287] ? inet6_csk_update_pmtu+0x160/0x160 [ 27.770012] ? __sk_dst_check+0x1a5/0x380 [ 27.774128] ? sk_wait_data+0x610/0x610 [ 27.778081] l2tp_xmit_skb+0x105f/0x1410 [ 27.782117] ? l2tp_session_create+0xb80/0xb80 [ 27.786668] ? sock_wmalloc+0x15d/0x1d0 [ 27.790615] ? iov_iter_advance+0x13f0/0x13f0 [ 27.795081] ? lock_release+0xa40/0xa40 [ 27.799028] ? pppol2tp_sendmsg+0x41b/0x670 [ 27.803320] pppol2tp_sendmsg+0x470/0x670 [ 27.807438] ? selinux_socket_sendmsg+0x36/0x40 [ 27.812080] ? pppol2tp_session_ioctl+0xa90/0xa90 [ 27.816900] sock_sendmsg+0xca/0x110 [ 27.820583] ___sys_sendmsg+0x320/0x8b0 [ 27.824531] ? copy_msghdr_from_user+0x590/0x590 [ 27.829255] ? __pmd_alloc+0x4e0/0x4e0 [ 27.833120] ? __fget_light+0x297/0x380 [ 27.837061] ? fget_raw+0x20/0x20 [ 27.840483] ? find_held_lock+0x35/0x1d0 [ 27.844520] ? __do_page_fault+0x5f7/0xc90 [ 27.848724] ? lock_downgrade+0x980/0x980 [ 27.852846] __sys_sendmmsg+0x1ee/0x620 [ 27.856788] ? __sys_sendmmsg+0x1ee/0x620 [ 27.860907] ? SyS_sendmsg+0x50/0x50 [ 27.864594] ? mm_fault_error+0x2c0/0x2c0 [ 27.868720] ? SYSC_bind+0x410/0x410 [ 27.872405] ? __do_page_fault+0xc90/0xc90 [ 27.876611] ? sock_map_fd+0x53/0x90 [ 27.880304] ? SyS_socket+0x12d/0x1d0 [ 27.884075] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.889060] SyS_sendmmsg+0x35/0x60 [ 27.892656] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 27.897380] RIP: 0033:0x44e199 [ 27.900537] RSP: 002b:00000000007efdf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 27.908212] RAX: ffffffffffffffda RBX: 00000000004b0010 RCX: 000000000044e199 [ 27.915455] RDX: 0000000000000007 RSI: 00000000204f2e78 RDI: 0000000000000005 [ 27.922693] RBP: 0000000000000068 R08: 00000000004b0010 R09: 00000000004b0010 [ 27.929929] R10: 000000002000c801 R11: 0000000000000246 R12: 0000000000000000 [ 27.937174] R13: 000000000000000a R14: 0000000000000000 R15: 0000000000000000 [ 27.944758] Dumping ftrace buffer: [ 27.948266] (ftrace buffer empty) [ 27.951949] Kernel Offset: disabled [ 27.955549] Rebooting in 86400 seconds..