[....] Starting enhanced syslogd: rsyslogd[ 12.712637] audit: type=1400 audit(1516053185.246:5): avc: denied { syslog } for pid=3511 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: [ 19.796377] audit: type=1400 audit(1516053192.330:6): avc: denied { map } for pid=3650 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 '10.128.0.51' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 40.743337] audit: type=1400 audit(1516053213.277:7): avc: denied { map } for pid=3667 comm="syzkaller562792" path="/root/syzkaller562792523" 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 [ 41.088795] 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 [ 41.481156] skbuff: skb_under_panic: text:00000000537b635f len:31 put:24 head:00000000e223ee69 data:0000000039098830 tail:0x7 end:0xc0 dev:gre0 [ 41.494358] ------------[ cut here ]------------ [ 41.499092] kernel BUG at net/core/skbuff.c:104! [ 41.503886] invalid opcode: 0000 [#1] SMP KASAN [ 41.508529] Dumping ftrace buffer: [ 41.512051] (ftrace buffer empty) [ 41.515745] Modules linked in: [ 41.518913] CPU: 0 PID: 3667 Comm: syzkaller562792 Not tainted 4.15.0-rc7-mm1+ #56 [ 41.526587] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.535938] RIP: 0010:skb_panic+0x162/0x1f0 [ 41.540227] RSP: 0018:ffff8801c30cf840 EFLAGS: 00010282 [ 41.545557] RAX: 0000000000000083 RBX: ffff8801d521d440 RCX: 0000000000000000 [ 41.552800] RDX: 0000000000000083 RSI: 1ffff10038619e92 RDI: ffffed0038619efc [ 41.560050] RBP: ffff8801c30cf8a8 R08: 1ffff10038619e8a R09: 0000000000000000 [ 41.567308] R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff862001e0 [ 41.574568] R13: ffffffff84a9161d R14: 0000000000000018 R15: ffff8801d2c6c140 [ 41.581820] FS: 0000000000edd880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 41.590016] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.595865] CR2: 00000000208bc000 CR3: 00000001bb8c2001 CR4: 00000000001606f0 [ 41.603118] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.610359] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.617686] Call Trace: [ 41.620259] ? report_usercopy+0xd0/0xd0 [ 41.624304] ? ipgre_header+0x6d/0x4e0 [ 41.628171] skb_push+0xce/0xf0 [ 41.631446] ipgre_header+0x6d/0x4e0 [ 41.635137] pppoe_sendmsg+0x58e/0x8b0 [ 41.638990] ? prepare_fb_xmit+0x990/0x990 [ 41.643216] ? pppoe_getname+0x210/0x210 [ 41.647254] ? selinux_socket_sendmsg+0x36/0x40 [ 41.651892] ? security_socket_sendmsg+0x89/0xb0 [ 41.656621] ? pppoe_getname+0x210/0x210 [ 41.660657] sock_sendmsg+0xca/0x110 [ 41.664345] sock_write_iter+0x31a/0x5d0 [ 41.668404] ? sock_sendmsg+0x110/0x110 [ 41.672371] ? bpf_fd_pass+0x280/0x280 [ 41.676241] ? __might_sleep+0x4c/0x190 [ 41.680194] do_iter_readv_writev+0x525/0x7f0 [ 41.684661] ? vfs_dedupe_file_range+0x8f0/0x8f0 [ 41.689391] ? rw_verify_area+0xe5/0x2b0 [ 41.693436] do_iter_write+0x154/0x540 [ 41.697301] ? dup_iter+0x260/0x260 [ 41.700905] vfs_writev+0x18a/0x340 [ 41.704502] ? __fget_light+0x297/0x380 [ 41.708446] ? vfs_iter_write+0xb0/0xb0 [ 41.712416] ? up_read+0x1a/0x40 [ 41.715752] ? __do_page_fault+0x3d6/0xc90 [ 41.719960] ? mm_fault_error+0x2c0/0x2c0 [ 41.724091] ? __fdget_pos+0x130/0x190 [ 41.727959] ? __fdget_raw+0x20/0x20 [ 41.731646] ? __do_page_fault+0xc90/0xc90 [ 41.735860] do_writev+0xfc/0x2a0 [ 41.739282] ? do_writev+0xfc/0x2a0 [ 41.742889] ? vfs_writev+0x340/0x340 [ 41.746664] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 41.751491] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 41.756481] SyS_writev+0x27/0x30 [ 41.759908] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 41.764635] RIP: 0033:0x445029 [ 41.767809] RSP: 002b:00007fff618d9708 EFLAGS: 00000217 ORIG_RAX: 0000000000000014 [ 41.775488] RAX: ffffffffffffffda RBX: 00000000004a6872 RCX: 0000000000445029 [ 41.782737] RDX: 0000000000000001 RSI: 0000000020211f90 RDI: 0000000000000004 [ 41.789989] RBP: 00007fff618d9818 R08: 0000000000000000 R09: 0000000000000000 [ 41.797244] R10: 0000000000000000 R11: 0000000000000217 R12: 00007fff618d9818 [ 41.804483] R13: 0000000000402530 R14: 0000000000000000 R15: 0000000000000000 [ 41.811733] Code: 04 01 84 c0 74 04 3c 03 7e 23 8b 8b 80 00 00 00 41 57 48 c7 c7 a0 fa 1f 86 52 56 4c 89 ea 41 50 4c 89 e6 45 89 f0 e8 46 c8 23 fd <0f> 0b 4c 89 4d b8 4c 89 45 c0 48 89 75 c8 48 89 55 d0 e8 d7 3e [ 41.830809] RIP: skb_panic+0x162/0x1f0 RSP: ffff8801c30cf840 [ 41.836866] ---[ end trace 347b1f05b581dad9 ]--- [ 41.841904] Kernel panic - not syncing: Fatal exception [ 41.847710] Dumping ftrace buffer: [ 41.851225] (ftrace buffer empty) [ 41.854914] Kernel Offset: disabled [ 41.858520] Rebooting in 86400 seconds..