[....] Starting enhanced syslogd: rsyslogd[ 16.599973] audit: type=1400 audit(1518240013.474:5): avc: denied { syslog } for pid=4012 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: [ 18.763547] audit: type=1400 audit(1518240015.638:6): avc: denied { map } for pid=4150 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 '10.128.0.53' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 36.602896] audit: type=1400 audit(1518240033.477:7): avc: denied { map } for pid=4168 comm="syzkaller206231" path="/root/syzkaller206231170" 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 [ 36.610081] IPVS: ftp: loaded support on port[0] = 21 RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 36.855446] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument executing program [ 37.207621] skbuff: skb_over_panic: text:000000008799e2ef len:1584 put:1584 head:0000000049a6d341 data:0000000017b26397 tail:0x6c8 end:0x6c0 dev: [ 37.221560] ------------[ cut here ]------------ [ 37.226296] kernel BUG at net/core/skbuff.c:104! [ 37.231086] invalid opcode: 0000 [#1] SMP KASAN [ 37.235730] Dumping ftrace buffer: [ 37.239242] (ftrace buffer empty) [ 37.242931] Modules linked in: [ 37.246098] CPU: 1 PID: 4169 Comm: syzkaller206231 Not tainted 4.15.0+ #306 [ 37.253166] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.262597] RIP: 0010:skb_panic+0x162/0x1f0 [ 37.266887] RSP: 0018:ffff8801b13c6fd8 EFLAGS: 00010282 [ 37.272219] RAX: 000000000000008b RBX: ffff8801b66c4dc0 RCX: 0000000000000000 [ 37.279472] RDX: 000000000000008b RSI: 1ffff10036278db0 RDI: ffffed0036278def [ 37.286743] RBP: ffff8801b13c7040 R08: 1ffff10036278d47 R09: 0000000000000000 [ 37.294012] R10: 0000000000000004 R11: 0000000000000000 R12: ffffffff86405e60 [ 37.301271] R13: ffffffff84c3af4c R14: 0000000000000630 R15: ffffffff864056a0 [ 37.308518] FS: 0000000000763880(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 37.316717] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.322584] CR2: 0000000020024000 CR3: 00000001b2752005 CR4: 00000000001606e0 [ 37.329917] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.337162] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.344420] Call Trace: [ 37.346987] ? skb_set_owner_w+0x330/0x330 [ 37.351203] ? __sys_sendmsg+0xe5/0x210 [ 37.355151] ? __ip6_append_data.isra.44+0x1edc/0x3390 [ 37.360398] skb_put+0x18d/0x1d0 [ 37.363752] __ip6_append_data.isra.44+0x1edc/0x3390 [ 37.368830] ? ip6_mtu+0x369/0x4d0 [ 37.372350] ? ip6_cork_release.isra.42+0x2c0/0x2c0 [ 37.377341] ? ip6_mtu+0x1c7/0x4d0 [ 37.380859] ? ip6_dst_ifdown+0x3d0/0x3d0 [ 37.384995] ? memcpy+0x45/0x50 [ 37.388249] ? ip6_setup_cork+0xeb8/0x1740 [ 37.392460] ? ip6_dst_mtu_forward+0x3c0/0x3c0 [ 37.397021] ? lock_acquire+0x1d5/0x580 [ 37.400965] ? lock_sock_nested+0xa3/0x110 [ 37.405185] ? lock_acquire+0x1d5/0x580 [ 37.409132] ? rawv6_sendmsg+0x1d86/0x40c0 [ 37.413345] ip6_append_data+0x189/0x290 [ 37.417392] ? rawv6_mh_filter_unregister+0xd0/0xd0 [ 37.422394] ? rawv6_mh_filter_unregister+0xd0/0xd0 [ 37.427384] rawv6_sendmsg+0x1e09/0x40c0 [ 37.431425] ? rawv6_bind+0x8c0/0x8c0 [ 37.435203] ? avc_has_perm+0x35e/0x680 [ 37.439149] ? lock_downgrade+0x980/0x980 [ 37.443269] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 37.448259] ? lock_release+0xa40/0xa40 [ 37.452206] ? depot_save_stack+0x2ca/0x460 [ 37.456514] ? save_stack+0xa3/0xd0 [ 37.460114] ? save_stack+0x43/0xd0 [ 37.463714] ? avc_has_perm+0x43e/0x680 [ 37.467663] ? avc_has_perm_noaudit+0x520/0x520 [ 37.472306] ? check_noncircular+0x20/0x20 [ 37.476510] ? lock_downgrade+0x980/0x980 [ 37.480633] ? lock_release+0xa40/0xa40 [ 37.484585] ? find_held_lock+0x35/0x1d0 [ 37.488629] inet_sendmsg+0x11f/0x5e0 [ 37.492400] ? inet_sendmsg+0x11f/0x5e0 [ 37.496360] ? inet_create+0xf50/0xf50 [ 37.500221] ? selinux_socket_sendmsg+0x36/0x40 [ 37.504864] ? security_socket_sendmsg+0x89/0xb0 [ 37.509591] ? inet_create+0xf50/0xf50 [ 37.513467] sock_sendmsg+0xca/0x110 [ 37.517155] ___sys_sendmsg+0x767/0x8b0 [ 37.521107] ? copy_msghdr_from_user+0x590/0x590 [ 37.525839] ? __local_bh_enable_ip+0x121/0x230 [ 37.530478] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 37.535466] ? release_sock+0x1d4/0x2a0 [ 37.539424] ? trace_hardirqs_on+0xd/0x10 [ 37.543544] ? __local_bh_enable_ip+0x121/0x230 [ 37.548198] ? _raw_spin_unlock_bh+0x30/0x40 [ 37.552580] ? __fget_light+0x2b2/0x3c0 [ 37.556537] ? fget_raw+0x20/0x20 [ 37.559970] ? lock_sock_nested+0x91/0x110 [ 37.564176] ? trace_hardirqs_on+0xd/0x10 [ 37.568294] ? __local_bh_enable_ip+0x121/0x230 [ 37.572939] ? ip6_datagram_connect+0x3a/0x50 [ 37.577407] ? ip6_datagram_connect_v6_only+0x66/0x80 [ 37.582592] __sys_sendmsg+0xe5/0x210 [ 37.586375] ? __sys_sendmsg+0xe5/0x210 [ 37.590322] ? SyS_shutdown+0x290/0x290 [ 37.594279] ? move_addr_to_kernel+0x60/0x60 [ 37.598660] SyS_sendmsg+0x2d/0x50 [ 37.602170] ? __sys_sendmsg+0x210/0x210 [ 37.606209] do_syscall_64+0x282/0x940 [ 37.610067] ? __do_page_fault+0xc90/0xc90 [ 37.614274] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 37.619000] ? syscall_return_slowpath+0x550/0x550 [ 37.623916] ? syscall_return_slowpath+0x2ac/0x550 [ 37.628817] ? prepare_exit_to_usermode+0x350/0x350 [ 37.633805] ? entry_SYSCALL_64_after_hwframe+0x36/0x9b [ 37.639150] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.643986] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 37.649150] RIP: 0033:0x4456c9 [ 37.652318] RSP: 002b:00007ffe43f8afa8 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 37.660003] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 00000000004456c9 [ 37.667244] RDX: 0000000000008000 RSI: 0000000020000000 RDI: 0000000000000004 [ 37.674487] RBP: 00000000004a7273 R08: 0000000000000000 R09: 0000000000000000 [ 37.681729] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000402800 [ 37.688973] R13: 0000000000402890 R14: 0000000000000000 R15: 0000000000000000 [ 37.696239] Code: 04 01 84 c0 74 04 3c 03 7e 23 8b 8b 80 00 00 00 41 57 48 c7 c7 e0 56 40 86 52 56 4c 89 ea 41 50 4c 89 e6 45 89 f0 e8 d6 63 22 fd <0f> 0b 4c 89 4d b8 4c 89 45 c0 48 89 75 c8 48 89 55 d0 e8 f7 0e [ 37.715322] RIP: skb_panic+0x162/0x1f0 RSP: ffff8801b13c6fd8 [ 37.721420] ---[ end trace e2ebe6f48e7f5b6c ]--- [ 37.726181] Kernel panic - not syncing: Fatal exception [ 37.731893] Dumping ftrace buffer: [ 37.735411] (ftrace buffer empty) [ 37.739096] Kernel Offset: disabled [ 37.742696] Rebooting in 86400 seconds..