[....] Starting enhanced syslogd: rsyslogd[ 12.509646] audit: type=1400 audit(1516053896.102:5): avc: denied { syslog } for pid=3505 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: [ 18.713935] audit: type=1400 audit(1516053902.306:6): avc: denied { map } for pid=3645 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 '10.128.0.35' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 24.939239] audit: type=1400 audit(1516053908.532:7): avc: denied { map } for pid=3659 comm="syzkaller542825" path="/root/syzkaller542825031" 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 RTNETLINK answers: Operation not supported [ 25.201895] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument executing program [ 25.507449] skbuff: skb_under_panic: text:000000002dfd8080 len:82 put:24 head:00000000a0a56971 data:00000000ad8a9d13 tail:0x3a end:0xc0 dev:gre0 [ 25.520695] ------------[ cut here ]------------ [ 25.525420] kernel BUG at net/core/skbuff.c:104! [ 25.530175] invalid opcode: 0000 [#1] SMP KASAN [ 25.534810] Dumping ftrace buffer: [ 25.538315] (ftrace buffer empty) [ 25.541994] Modules linked in: [ 25.545157] CPU: 0 PID: 3659 Comm: syzkaller542825 Not tainted 4.15.0-rc7-mm1+ #56 [ 25.552827] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.562157] RIP: 0010:skb_panic+0x162/0x1f0 [ 25.566444] RSP: 0018:ffff8801c0af7840 EFLAGS: 00010282 [ 25.571774] RAX: 0000000000000084 RBX: ffff8801d49b86c0 RCX: 0000000000000000 [ 25.579012] RDX: 0000000000000084 RSI: 1ffff1003815ee92 RDI: ffffed003815eefc [ 25.586250] RBP: ffff8801c0af78a8 R08: 1ffff1003815ee8a R09: 0000000000000000 [ 25.593489] R10: 0000000000000008 R11: 0000000000000000 R12: ffffffff862001e0 [ 25.600736] R13: ffffffff84a9161d R14: 0000000000000018 R15: ffff8801d2d20140 [ 25.607976] FS: 0000000000aae880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 25.616177] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.622026] CR2: 0000000020fa3000 CR3: 00000001bbe51001 CR4: 00000000001606f0 [ 25.629265] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.636503] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.643738] Call Trace: [ 25.646300] ? report_usercopy+0xd0/0xd0 [ 25.650330] ? ipgre_header+0x6d/0x4e0 [ 25.654185] skb_push+0xce/0xf0 [ 25.657434] ipgre_header+0x6d/0x4e0 [ 25.661116] pppoe_sendmsg+0x58e/0x8b0 [ 25.664973] ? prepare_fb_xmit+0x990/0x990 [ 25.669180] ? pppoe_getname+0x210/0x210 [ 25.673214] ? selinux_socket_sendmsg+0x36/0x40 [ 25.677849] ? security_socket_sendmsg+0x89/0xb0 [ 25.682571] ? pppoe_getname+0x210/0x210 [ 25.686600] sock_sendmsg+0xca/0x110 [ 25.690282] sock_write_iter+0x31a/0x5d0 [ 25.694312] ? sock_sendmsg+0x110/0x110 [ 25.698257] ? bpf_fd_pass+0x280/0x280 [ 25.702112] ? __might_sleep+0x4c/0x190 [ 25.706055] do_iter_readv_writev+0x525/0x7f0 [ 25.710520] ? vfs_dedupe_file_range+0x8f0/0x8f0 [ 25.715247] ? rw_verify_area+0xe5/0x2b0 [ 25.719278] do_iter_write+0x154/0x540 [ 25.723134] ? dup_iter+0x260/0x260 [ 25.726740] vfs_writev+0x18a/0x340 [ 25.730337] ? __fget_light+0x297/0x380 [ 25.734280] ? vfs_iter_write+0xb0/0xb0 [ 25.738225] ? up_read+0x1a/0x40 [ 25.741562] ? __do_page_fault+0x3d6/0xc90 [ 25.745768] ? mm_fault_error+0x2c0/0x2c0 [ 25.749890] ? __fdget_raw+0x20/0x20 [ 25.753586] ? __do_page_fault+0xc90/0xc90 [ 25.757791] do_writev+0xfc/0x2a0 [ 25.761212] ? do_writev+0xfc/0x2a0 [ 25.765858] ? vfs_writev+0x340/0x340 [ 25.769626] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 25.774437] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.779684] SyS_writev+0x27/0x30 [ 25.783367] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 25.788090] RIP: 0033:0x445109 [ 25.791248] RSP: 002b:00007fff30bcc408 EFLAGS: 00000217 ORIG_RAX: 0000000000000014 [ 25.798924] RAX: ffffffffffffffda RBX: 00000000004a6952 RCX: 0000000000445109 [ 25.806160] RDX: 0000000000000006 RSI: 0000000020935fa0 RDI: 0000000000000004 [ 25.813397] RBP: 00007fff30bcc508 R08: 0000000020ae0000 R09: 0000000020ae0000 [ 25.820634] R10: 0000000020ae0000 R11: 0000000000000217 R12: 00007fff30bcc508 [ 25.827870] R13: 0000000000402610 R14: 0000000000000000 R15: 0000000000000000 [ 25.835117] 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 [ 25.854181] RIP: skb_panic+0x162/0x1f0 RSP: ffff8801c0af7840 [ 25.860032] ---[ end trace a2a0285170f7f4de ]--- [ 25.865039] Kernel panic - not syncing: Fatal exception [ 25.870817] Dumping ftrace buffer: [ 25.874338] (ftrace buffer empty) [ 25.878021] Kernel Offset: disabled [ 25.881627] Rebooting in 86400 seconds..