[....] Starting enhanced syslogd: rsyslogd[ 15.802949] audit: type=1400 audit(1519832640.249:5): avc: denied { syslog } for pid=3941 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: [ 18.902280] audit: type=1400 audit(1519832643.348:6): avc: denied { map } for pid=4079 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 '10.128.0.40' (ECDSA) to the list of known hosts. executing program [ 25.241576] audit: type=1400 audit(1519832649.688:7): avc: denied { map } for pid=4093 comm="syzkaller235605" path="/root/syzkaller235605920" 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 [ 25.243912] ------------[ cut here ]------------ [ 25.272220] kernel BUG at ./include/linux/skbuff.h:2076! [ 25.277829] invalid opcode: 0000 [#1] SMP KASAN [ 25.282470] Dumping ftrace buffer: [ 25.285976] (ftrace buffer empty) [ 25.289652] Modules linked in: [ 25.292814] CPU: 1 PID: 4093 Comm: syzkaller235605 Not tainted 4.16.0-rc2+ #245 [ 25.300225] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.309554] RIP: 0010:__ip6_make_skb+0x1ac8/0x2190 [ 25.314450] RSP: 0018:ffff8801cc06f1f0 EFLAGS: 00010293 [ 25.319786] RAX: ffff8801cc03e680 RBX: 00000000000006e0 RCX: ffffffff84f027a8 [ 25.327026] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8801ce3e7d60 [ 25.334265] RBP: ffff8801cc06f460 R08: ffff8801cda19384 R09: 0000000000000000 [ 25.341502] R10: ffff8801cc06f480 R11: fd676b049aac0ae7 R12: 00000000000005a1 [ 25.348741] R13: ffff8801ce3e7880 R14: dffffc0000000000 R15: ffff8801cda19300 [ 25.355981] FS: 0000000001f4b880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 25.364175] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.370023] CR2: 000056238bfe3100 CR3: 00000001cae34006 CR4: 00000000001606e0 [ 25.377269] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.384509] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.391748] Call Trace: [ 25.394314] ? ip6_output+0x840/0x840 [ 25.398082] ? __lock_acquire+0x664/0x3e00 [ 25.402285] ? check_noncircular+0x20/0x20 [ 25.406488] ? check_noncircular+0x20/0x20 [ 25.410699] ? print_irqtrace_events+0x270/0x270 [ 25.415421] ? find_held_lock+0x35/0x1d0 [ 25.419456] ? lock_acquire+0x1d5/0x580 [ 25.423398] ? lock_sock_nested+0xa3/0x110 [ 25.427600] ? lock_acquire+0x1d5/0x580 [ 25.431544] ? udpv6_sendmsg+0x9c5/0x3400 [ 25.435662] udp_v6_push_pending_frames+0x269/0x3b0 [ 25.440643] ? udp_v6_push_pending_frames+0x269/0x3b0 [ 25.445803] ? udp_v6_send_skb+0xf70/0xf70 [ 25.450004] ? ip6_append_data+0x189/0x290 [ 25.454211] udpv6_sendmsg+0x2a96/0x3400 [ 25.458243] ? ip_reply_glue_bits+0xb0/0xb0 [ 25.462538] ? udpv6_setsockopt+0x80/0x80 [ 25.466663] ? avc_has_perm+0x43e/0x680 [ 25.470606] ? avc_has_perm_noaudit+0x520/0x520 [ 25.475248] ? __might_sleep+0x95/0x190 [ 25.479195] ? kasan_check_write+0x14/0x20 [ 25.483400] ? _copy_from_user+0x99/0x110 [ 25.487516] ? rw_copy_check_uvector+0x1be/0x280 [ 25.492241] ? sock_has_perm+0x2a4/0x420 [ 25.496272] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 25.501604] ? dup_iter+0x182/0x260 [ 25.505204] inet_sendmsg+0x11f/0x5e0 [ 25.508971] ? inet_sendmsg+0x11f/0x5e0 [ 25.512914] ? copy_msghdr_from_user+0x3a6/0x590 [ 25.517639] ? rcu_pm_notify+0xc0/0xc0 [ 25.521493] ? inet_create+0xf50/0xf50 [ 25.525348] ? selinux_socket_sendmsg+0x36/0x40 [ 25.529995] ? security_socket_sendmsg+0x89/0xb0 [ 25.534719] ? inet_create+0xf50/0xf50 [ 25.538580] sock_sendmsg+0xca/0x110 [ 25.542264] ___sys_sendmsg+0x767/0x8b0 [ 25.546211] ? copy_msghdr_from_user+0x590/0x590 [ 25.550941] ? __local_bh_enable_ip+0x121/0x230 [ 25.555578] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.560563] ? release_sock+0x1d4/0x2a0 [ 25.564506] ? trace_hardirqs_on+0xd/0x10 [ 25.568623] ? __local_bh_enable_ip+0x121/0x230 [ 25.573270] ? __fget_light+0x2b2/0x3c0 [ 25.577215] ? fget_raw+0x20/0x20 [ 25.580638] ? release_sock+0x1d4/0x2a0 [ 25.584585] ? __release_sock+0x360/0x360 [ 25.588704] ? lock_sock_nested+0x91/0x110 [ 25.592911] ? trace_hardirqs_on+0xd/0x10 [ 25.597029] ? __local_bh_enable_ip+0x121/0x230 [ 25.601672] ? ip6_datagram_connect+0x3a/0x50 [ 25.606145] __sys_sendmsg+0xe5/0x210 [ 25.609917] ? __sys_sendmsg+0xe5/0x210 [ 25.613861] ? SyS_shutdown+0x290/0x290 [ 25.617813] ? move_addr_to_kernel+0x60/0x60 [ 25.622189] ? __sys_sendmsg+0x210/0x210 [ 25.626219] SyS_sendmsg+0x2d/0x50 [ 25.629732] do_syscall_64+0x280/0x940 [ 25.633587] ? __do_page_fault+0xc90/0xc90 [ 25.637791] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.642515] ? syscall_return_slowpath+0x550/0x550 [ 25.647413] ? syscall_return_slowpath+0x2ac/0x550 [ 25.652310] ? prepare_exit_to_usermode+0x350/0x350 [ 25.657296] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 25.663177] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.667992] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 25.673150] RIP: 0033:0x4402a9 [ 25.676307] RSP: 002b:00007ffc38f4a348 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 25.683983] RAX: ffffffffffffffda RBX: 0100000000000000 RCX: 00000000004402a9 [ 25.691222] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 [ 25.698457] RBP: 00000000006cb018 R08: 0000000000000001 R09: 0000000000000001 [ 25.705695] R10: 0000000000000001 R11: 0000000000000217 R12: 0000000000401bd0 [ 25.712934] R13: 0000000000401c60 R14: 0000000000000000 R15: 0000000000000000 [ 25.720179] Code: ff e8 8d 53 b9 fc e9 15 e9 ff ff e8 83 53 b9 fc e9 44 e8 ff ff e8 99 53 b9 fc e9 c0 e6 ff ff e8 8f e9 80 fc 0f 0b e8 88 e9 80 fc <0f> 0b 49 8d 87 80 00 00 00 4d 8d 87 84 00 00 00 48 89 85 20 fe [ 25.739244] RIP: __ip6_make_skb+0x1ac8/0x2190 RSP: ffff8801cc06f1f0 [ 25.745753] ---[ end trace e592c021f58b3063 ]--- [ 25.750497] Kernel panic - not syncing: Fatal exception [ 25.756176] Dumping ftrace buffer: [ 25.759686] (ftrace buffer empty) [ 25.763368] Kernel Offset: disabled [ 25.766966] Rebooting in 86400 seconds..