[....] Starting enhanced syslogd: rsyslogd[ 13.674239] audit: type=1400 audit(1516049244.073:5): 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: [ 15.959779] audit: type=1400 audit(1516049246.358:6): avc: denied { map } for pid=3649 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 '10.128.15.241' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 22.539813] audit: type=1400 audit(1516049252.938:7): avc: denied { map } for pid=3663 comm="syzkaller149576" path="/root/syzkaller149576426" 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 [ 22.953532] 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 [ 23.337669] skbuff: skb_under_panic: text:00000000ce43aa81 len:82 put:24 head:00000000fd5b4fda data:0000000066ee7fac tail:0x3a end:0xc0 dev:gre0 [ 23.351272] ------------[ cut here ]------------ [ 23.356040] kernel BUG at net/core/skbuff.c:104! [ 23.360984] invalid opcode: 0000 [#1] SMP KASAN [ 23.365662] Dumping ftrace buffer: [ 23.369180] (ftrace buffer empty) [ 23.372867] Modules linked in: [ 23.376049] CPU: 0 PID: 3663 Comm: syzkaller149576 Not tainted 4.15.0-rc7+ #190 [ 23.383466] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.392805] RIP: 0010:skb_panic+0x162/0x1f0 [ 23.397098] RSP: 0018:ffff8801d99b7840 EFLAGS: 00010282 [ 23.402434] RAX: 0000000000000084 RBX: ffff8801d53e3dc0 RCX: 0000000000000000 [ 23.409680] RDX: 0000000000000084 RSI: 1ffff1003b336ec8 RDI: ffffed003b336efc [ 23.416926] RBP: ffff8801d99b78a8 R08: 1ffff1003b336e8a R09: 0000000000000000 [ 23.424172] R10: 0000000000000008 R11: 0000000000000000 R12: ffffffff861f9760 [ 23.431430] R13: ffffffff84a4e64d R14: 0000000000000018 R15: ffff8801d3212180 [ 23.438678] FS: 000000000074f880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 23.446887] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.452747] CR2: 0000000020fa3000 CR3: 00000001bc241004 CR4: 00000000001606f0 [ 23.459997] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.467259] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.474516] Call Trace: [ 23.477089] ? check_stack_object+0x140/0x140 [ 23.481582] ? ipgre_header+0x6d/0x4e0 [ 23.485447] skb_push+0xce/0xf0 [ 23.488699] ipgre_header+0x6d/0x4e0 [ 23.492391] pppoe_sendmsg+0x58e/0x8b0 [ 23.496255] ? prepare_fb_xmit+0x990/0x990 [ 23.500466] ? pppoe_getname+0x210/0x210 [ 23.504504] ? selinux_socket_sendmsg+0x36/0x40 [ 23.509160] ? security_socket_sendmsg+0x89/0xb0 [ 23.513890] ? pppoe_getname+0x210/0x210 [ 23.517940] sock_sendmsg+0xca/0x110 [ 23.521631] sock_write_iter+0x31a/0x5d0 [ 23.525672] ? sock_sendmsg+0x110/0x110 [ 23.529627] ? bpf_fd_pass+0x280/0x280 [ 23.533491] ? __might_sleep+0x6c/0x190 [ 23.537464] do_iter_readv_writev+0x525/0x7f0 [ 23.541944] ? vfs_dedupe_file_range+0x8f0/0x8f0 [ 23.546679] ? rw_verify_area+0xe5/0x2b0 [ 23.550726] do_iter_write+0x154/0x540 [ 23.554598] ? dup_iter+0x260/0x260 [ 23.558212] vfs_writev+0x18a/0x340 [ 23.561820] ? __fget_light+0x297/0x380 [ 23.565773] ? vfs_iter_write+0xb0/0xb0 [ 23.569732] ? up_read+0x1a/0x40 [ 23.573078] ? __do_page_fault+0x3d6/0xc90 [ 23.577302] ? mm_fault_error+0x2c0/0x2c0 [ 23.581440] ? __fdget_raw+0x20/0x20 [ 23.585130] ? __do_page_fault+0xc90/0xc90 [ 23.589347] do_writev+0xfc/0x2a0 [ 23.592785] ? do_writev+0xfc/0x2a0 [ 23.596386] ? vfs_writev+0x340/0x340 [ 23.600162] ? entry_SYSCALL_64_fastpath+0x5/0x9a [ 23.604981] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.609977] SyS_writev+0x27/0x30 [ 23.613416] entry_SYSCALL_64_fastpath+0x23/0x9a [ 23.618144] RIP: 0033:0x445109 [ 23.621308] RSP: 002b:00007ffecc387138 EFLAGS: 00000217 ORIG_RAX: 0000000000000014 [ 23.628989] RAX: ffffffffffffffda RBX: 00000000004a6952 RCX: 0000000000445109 [ 23.636235] RDX: 0000000000000006 RSI: 0000000020935fa0 RDI: 0000000000000004 [ 23.643479] RBP: 00007ffecc387238 R08: 0000000020ae0000 R09: 0000000020ae0000 [ 23.650724] R10: 0000000020ae0000 R11: 0000000000000217 R12: 00007ffecc387238 [ 23.657979] R13: 0000000000402610 R14: 0000000000000000 R15: 0000000000000000 [ 23.665235] Code: 04 01 84 c0 74 04 3c 03 7e 23 8b 8b 80 00 00 00 41 57 48 c7 c7 20 90 1f 86 52 56 4c 89 ea 41 50 4c 89 e6 45 89 f0 e8 46 a1 27 fd <0f> 0b 4c 89 4d b8 4c 89 45 c0 48 89 75 c8 48 89 55 d0 e8 37 d0 [ 23.684318] RIP: skb_panic+0x162/0x1f0 RSP: ffff8801d99b7840 [ 23.690501] ---[ end trace 92a88b81cf30cb02 ]--- [ 23.695542] Kernel panic - not syncing: Fatal exception [ 23.701333] Dumping ftrace buffer: [ 23.704853] (ftrace buffer empty) [ 23.708538] Kernel Offset: disabled [ 23.712154] Rebooting in 86400 seconds..