[....] Starting enhanced syslogd: rsyslogd[ 17.322347] audit: type=1400 audit(1519836177.869:5): avc: denied { syslog } for pid=4097 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: [ 22.406417] audit: type=1400 audit(1519836182.953:6): avc: denied { map } for pid=4237 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 '10.128.0.13' (ECDSA) to the list of known hosts. executing program [ 28.714988] audit: type=1400 audit(1519836189.261:7): avc: denied { map } for pid=4251 comm="syzkaller092998" path="/root/syzkaller092998485" 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 [ 28.718141] ------------[ cut here ]------------ [ 28.745695] kernel BUG at ./include/linux/skbuff.h:2073! [ 28.751299] invalid opcode: 0000 [#1] SMP KASAN [ 28.755952] Dumping ftrace buffer: [ 28.759462] (ftrace buffer empty) [ 28.763143] Modules linked in: [ 28.766308] CPU: 0 PID: 4251 Comm: syzkaller092998 Not tainted 4.16.0-rc3+ #332 [ 28.773720] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.783051] RIP: 0010:__ip6_make_skb+0x1ac8/0x2190 [ 28.787948] RSP: 0018:ffff8801c381f1f0 EFLAGS: 00010293 [ 28.793281] RAX: ffff8801ae58a180 RBX: 00000000000006e0 RCX: ffffffff84efbde8 [ 28.800524] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8801b1243d18 [ 28.807791] RBP: ffff8801c381f460 R08: ffff8801b0c19b04 R09: 0000000000000000 [ 28.815033] R10: ffff8801c381f480 R11: fd676b049aac0ae7 R12: 00000000000005a1 [ 28.822272] R13: ffff8801b1243840 R14: dffffc0000000000 R15: ffff8801b0c19a80 [ 28.829514] FS: 00000000006d1880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 28.837707] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.843558] CR2: 0000000020000280 CR3: 00000001ca0ff005 CR4: 00000000001606f0 [ 28.850799] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.858040] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.865279] Call Trace: [ 28.867848] ? ip6_output+0x840/0x840 [ 28.871621] ? __lock_acquire+0x664/0x3e00 [ 28.875830] ? trace_hardirqs_off+0x10/0x10 [ 28.880131] ? trace_hardirqs_off+0x10/0x10 [ 28.884431] ? print_irqtrace_events+0x270/0x270 [ 28.889154] ? find_held_lock+0x35/0x1d0 [ 28.893187] ? lock_acquire+0x1d5/0x580 [ 28.897132] ? lock_sock_nested+0xa3/0x110 [ 28.901337] ? lock_acquire+0x1d5/0x580 [ 28.905281] ? udpv6_sendmsg+0x9c5/0x3400 [ 28.909404] udp_v6_push_pending_frames+0x269/0x3b0 [ 28.914391] ? udp_v6_push_pending_frames+0x269/0x3b0 [ 28.919550] ? udp_v6_send_skb+0xf70/0xf70 [ 28.923756] ? ip6_append_data+0x189/0x290 [ 28.927968] udpv6_sendmsg+0x2a96/0x3400 [ 28.932001] ? ip_reply_glue_bits+0xb0/0xb0 [ 28.936307] ? udpv6_setsockopt+0x80/0x80 [ 28.940431] ? avc_has_perm+0x43e/0x680 [ 28.944378] ? avc_has_perm_noaudit+0x520/0x520 [ 28.949029] ? __might_sleep+0x95/0x190 [ 28.952980] ? kasan_check_write+0x14/0x20 [ 28.957188] ? _copy_from_user+0x99/0x110 [ 28.961309] ? rw_copy_check_uvector+0x1be/0x280 [ 28.966039] ? sock_has_perm+0x2a4/0x420 [ 28.970074] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 28.975407] ? dup_iter+0x1d2/0x260 [ 28.979012] inet_sendmsg+0x11f/0x5e0 [ 28.982787] ? inet_sendmsg+0x11f/0x5e0 [ 28.986736] ? copy_msghdr_from_user+0x3a6/0x590 [ 28.991463] ? rcu_pm_notify+0xc0/0xc0 [ 28.995319] ? inet_create+0xf50/0xf50 [ 28.999176] ? selinux_socket_sendmsg+0x36/0x40 [ 29.003815] ? security_socket_sendmsg+0x89/0xb0 [ 29.008542] ? inet_create+0xf50/0xf50 [ 29.012399] sock_sendmsg+0xca/0x110 [ 29.016085] ___sys_sendmsg+0x767/0x8b0 [ 29.020041] ? copy_msghdr_from_user+0x590/0x590 [ 29.024775] ? __local_bh_enable_ip+0x121/0x230 [ 29.029417] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.034401] ? release_sock+0x1d4/0x2a0 [ 29.038346] ? trace_hardirqs_on+0xd/0x10 [ 29.042465] ? __local_bh_enable_ip+0x121/0x230 [ 29.047107] ? __fget_light+0x2b2/0x3c0 [ 29.051052] ? fget_raw+0x20/0x20 [ 29.054475] ? release_sock+0x1d4/0x2a0 [ 29.058421] ? __release_sock+0x360/0x360 [ 29.062537] ? lock_sock_nested+0x91/0x110 [ 29.066741] ? trace_hardirqs_on+0xd/0x10 [ 29.070860] ? __local_bh_enable_ip+0x121/0x230 [ 29.075504] ? ip6_datagram_connect+0x3a/0x50 [ 29.079975] __sys_sendmsg+0xe5/0x210 [ 29.083744] ? __sys_sendmsg+0xe5/0x210 [ 29.087689] ? SyS_shutdown+0x290/0x290 [ 29.091644] ? move_addr_to_kernel+0x60/0x60 [ 29.096035] SyS_sendmsg+0x2d/0x50 [ 29.099548] ? __sys_sendmsg+0x210/0x210 [ 29.103581] do_syscall_64+0x281/0x940 [ 29.107441] ? __do_page_fault+0xc90/0xc90 [ 29.111646] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 29.116373] ? syscall_return_slowpath+0x550/0x550 [ 29.121274] ? syscall_return_slowpath+0x2ac/0x550 [ 29.126175] ? prepare_exit_to_usermode+0x350/0x350 [ 29.131164] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 29.136499] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.141316] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 29.146475] RIP: 0033:0x4402a9 [ 29.149636] RSP: 002b:00007ffcbb6929c8 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 29.157310] RAX: ffffffffffffffda RBX: 0100000000000000 RCX: 00000000004402a9 [ 29.164549] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 [ 29.171787] RBP: 00000000006cb018 R08: 0000000000000001 R09: 0000000000000001 [ 29.179032] R10: 0000000000000001 R11: 0000000000000217 R12: 0000000000401bd0 [ 29.186272] R13: 0000000000401c60 R14: 0000000000000000 R15: 0000000000000000 [ 29.193520] Code: ff e8 6d 74 b9 fc e9 15 e9 ff ff e8 63 74 b9 fc e9 44 e8 ff ff e8 79 74 b9 fc e9 c0 e6 ff ff e8 5f 36 81 fc 0f 0b e8 58 36 81 fc <0f> 0b 49 8d 87 80 00 00 00 4d 8d 87 84 00 00 00 48 89 85 20 fe [ 29.212588] RIP: __ip6_make_skb+0x1ac8/0x2190 RSP: ffff8801c381f1f0 [ 29.219178] ---[ end trace 07ff165e0714390f ]--- [ 29.223945] Kernel panic - not syncing: Fatal exception [ 29.229679] Dumping ftrace buffer: [ 29.233200] (ftrace buffer empty) [ 29.236881] Kernel Offset: disabled [ 29.240477] Rebooting in 86400 seconds..