[....] Starting enhanced syslogd: rsyslogd[ 12.794622] audit: type=1400 audit(1516051220.762:5): avc: denied { syslog } for pid=3506 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: [ 17.796066] audit: type=1400 audit(1516051225.763:6): avc: denied { map } for pid=3647 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 '10.128.15.202' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 24.132211] audit: type=1400 audit(1516051232.099:7): avc: denied { map } for pid=3661 comm="syzkaller130625" path="/root/syzkaller130625785" 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 RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 24.512767] 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 [ 24.855990] skbuff: skb_under_panic: text:000000002071414a len:31 put:24 head:00000000719deb85 data:0000000024baddf4 tail:0x7 end:0xc0 dev:gre0 [ 24.869213] ------------[ cut here ]------------ [ 24.873963] kernel BUG at net/core/skbuff.c:104! [ 24.878759] invalid opcode: 0000 [#1] SMP KASAN [ 24.883418] Dumping ftrace buffer: [ 24.886930] (ftrace buffer empty) [ 24.890633] Modules linked in: [ 24.893800] CPU: 0 PID: 3661 Comm: syzkaller130625 Not tainted 4.15.0-rc7-next-20180115+ #97 [ 24.902345] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.911688] RIP: 0010:skb_panic+0x162/0x1f0 [ 24.915976] RSP: 0018:ffff8801bbdff840 EFLAGS: 00010282 [ 24.921315] RAX: 0000000000000083 RBX: ffff8801d4f39000 RCX: 0000000000000000 [ 24.928572] RDX: 0000000000000083 RSI: 1ffff100377bfe92 RDI: ffffed00377bfefc [ 24.935818] RBP: ffff8801bbdff8a8 R08: 1ffff100377bfe8a R09: 0000000000000000 [ 24.943056] R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff86200de0 [ 24.950295] R13: ffffffff84a981ad R14: 0000000000000018 R15: ffff8801d2d0a180 [ 24.957536] FS: 0000000001cb0880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 24.965731] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.971590] CR2: 00000000208bc000 CR3: 00000001d9a57003 CR4: 00000000001606f0 [ 24.978831] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.986069] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.993307] Call Trace: [ 24.995870] ? usercopy_abort+0xd0/0xd0 [ 24.999827] ? ipgre_header+0x6d/0x4e0 [ 25.003696] skb_push+0xce/0xf0 [ 25.006945] ipgre_header+0x6d/0x4e0 [ 25.010628] pppoe_sendmsg+0x58e/0x8b0 [ 25.014491] ? prepare_fb_xmit+0x990/0x990 [ 25.018696] ? pppoe_getname+0x210/0x210 [ 25.022727] ? selinux_socket_sendmsg+0x36/0x40 [ 25.027374] ? security_socket_sendmsg+0x89/0xb0 [ 25.032098] ? pppoe_getname+0x210/0x210 [ 25.036130] sock_sendmsg+0xca/0x110 [ 25.039810] sock_write_iter+0x31a/0x5d0 [ 25.043839] ? sock_sendmsg+0x110/0x110 [ 25.047794] ? bpf_fd_pass+0x280/0x280 [ 25.051651] ? ___might_sleep+0x44c/0x470 [ 25.055780] do_iter_readv_writev+0x525/0x7f0 [ 25.060255] ? vfs_dedupe_file_range+0x8f0/0x8f0 [ 25.064980] ? rw_verify_area+0xe5/0x2b0 [ 25.069015] do_iter_write+0x154/0x540 [ 25.072875] ? dup_iter+0x260/0x260 [ 25.076483] vfs_writev+0x18a/0x340 [ 25.080090] ? __fget_light+0x297/0x380 [ 25.084032] ? vfs_iter_write+0xb0/0xb0 [ 25.087979] ? up_read+0x1a/0x40 [ 25.091314] ? __do_page_fault+0x3d6/0xc90 [ 25.095523] ? mm_fault_error+0x2c0/0x2c0 [ 25.099641] ? __fdget_pos+0x130/0x190 [ 25.103497] ? __fdget_raw+0x20/0x20 [ 25.107189] ? __do_page_fault+0xc90/0xc90 [ 25.111396] do_writev+0xfc/0x2a0 [ 25.114816] ? do_writev+0xfc/0x2a0 [ 25.118412] ? vfs_writev+0x340/0x340 [ 25.122182] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 25.127010] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.132008] SyS_writev+0x27/0x30 [ 25.135446] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 25.140192] RIP: 0033:0x445029 [ 25.143362] RSP: 002b:00007ffd70bd92b8 EFLAGS: 00000217 ORIG_RAX: 0000000000000014 [ 25.151037] RAX: ffffffffffffffda RBX: 00000000004a6872 RCX: 0000000000445029 [ 25.158537] RDX: 0000000000000001 RSI: 0000000020211f90 RDI: 0000000000000004 [ 25.165786] RBP: 00007ffd70bd93c8 R08: 0000000000000000 R09: 0000000000000000 [ 25.173038] R10: 0000000000000000 R11: 0000000000000217 R12: 00007ffd70bd93c8 [ 25.180284] R13: 0000000000402530 R14: 0000000000000000 R15: 0000000000000000 [ 25.187556] Code: 04 01 84 c0 74 04 3c 03 7e 23 8b 8b 80 00 00 00 41 57 48 c7 c7 a0 06 20 86 52 56 4c 89 ea 41 50 4c 89 e6 45 89 f0 e8 b6 c9 23 fd <0f> 0b 4c 89 4d b8 4c 89 45 c0 48 89 75 c8 48 89 55 d0 e8 37 42 [ 25.206647] RIP: skb_panic+0x162/0x1f0 RSP: ffff8801bbdff840 [ 25.212636] ---[ end trace 0d73d47b4ef0141f ]--- [ 25.217473] Kernel panic - not syncing: Fatal exception [ 25.223352] Dumping ftrace buffer: [ 25.226873] (ftrace buffer empty) [ 25.230552] Kernel Offset: disabled [ 25.234157] Rebooting in 86400 seconds..