[....] Starting enhanced syslogd: rsyslogd[ 13.229709] audit: type=1400 audit(1516052018.372:5): avc: denied { syslog } for pid=3517 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: [ 18.775501] audit: type=1400 audit(1516052023.918:6): avc: denied { map } for pid=3657 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 '10.128.15.223' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 25.031157] audit: type=1400 audit(1516052030.173:7): avc: denied { map } for pid=3671 comm="syzkaller817543" path="/root/syzkaller817543701" 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 [ 25.406565] 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 [ 25.746129] skbuff: skb_under_panic: text:00000000e7f891ec len:82 put:24 head:00000000fabd8df9 data:00000000dad53169 tail:0x3a end:0xc0 dev:gre0 [ 25.759631] ------------[ cut here ]------------ [ 25.764377] kernel BUG at net/core/skbuff.c:104! [ 25.769347] invalid opcode: 0000 [#1] SMP KASAN [ 25.774006] Dumping ftrace buffer: [ 25.777550] (ftrace buffer empty) [ 25.781255] Modules linked in: [ 25.784424] CPU: 0 PID: 3671 Comm: syzkaller817543 Not tainted 4.15.0-rc7-next-20180115+ #97 [ 25.792966] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.802300] RIP: 0010:skb_panic+0x162/0x1f0 [ 25.806588] RSP: 0018:ffff8801d944f840 EFLAGS: 00010282 [ 25.811920] RAX: 0000000000000084 RBX: ffff8801d459f640 RCX: 0000000000000000 [ 25.819161] RDX: 0000000000000084 RSI: 1ffff1003b289e92 RDI: ffffed003b289efc [ 25.826411] RBP: ffff8801d944f8a8 R08: 1ffff1003b289e8a R09: 0000000000000000 [ 25.833659] R10: 0000000000000008 R11: 0000000000000000 R12: ffffffff86200de0 [ 25.840902] R13: ffffffff84a981ad R14: 0000000000000018 R15: ffff8801d2d46180 [ 25.848155] FS: 00000000007a1880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 25.856350] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.862214] CR2: 0000000020fa3000 CR3: 00000001bbaf7002 CR4: 00000000001606f0 [ 25.869458] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.876698] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.883938] Call Trace: [ 25.886512] ? usercopy_abort+0xd0/0xd0 [ 25.890460] ? ipgre_header+0x6d/0x4e0 [ 25.894329] skb_push+0xce/0xf0 [ 25.897580] ipgre_header+0x6d/0x4e0 [ 25.901270] pppoe_sendmsg+0x58e/0x8b0 [ 25.905130] ? prepare_fb_xmit+0x990/0x990 [ 25.909350] ? pppoe_getname+0x210/0x210 [ 25.913403] ? selinux_socket_sendmsg+0x36/0x40 [ 25.918051] ? security_socket_sendmsg+0x89/0xb0 [ 25.922779] ? pppoe_getname+0x210/0x210 [ 25.926821] sock_sendmsg+0xca/0x110 [ 25.930517] sock_write_iter+0x31a/0x5d0 [ 25.934551] ? sock_sendmsg+0x110/0x110 [ 25.938511] ? bpf_fd_pass+0x280/0x280 [ 25.942375] ? ___might_sleep+0x44c/0x470 [ 25.946515] do_iter_readv_writev+0x525/0x7f0 [ 25.950986] ? vfs_dedupe_file_range+0x8f0/0x8f0 [ 25.955716] ? rw_verify_area+0xe5/0x2b0 [ 25.959752] do_iter_write+0x154/0x540 [ 25.963625] ? dup_iter+0x260/0x260 [ 25.967233] vfs_writev+0x18a/0x340 [ 25.970848] ? __fget_light+0x297/0x380 [ 25.974797] ? vfs_iter_write+0xb0/0xb0 [ 25.978744] ? up_read+0x1a/0x40 [ 25.982082] ? __do_page_fault+0x3d6/0xc90 [ 25.986292] ? mm_fault_error+0x2c0/0x2c0 [ 25.990425] ? __fdget_raw+0x20/0x20 [ 25.994113] ? __do_page_fault+0xc90/0xc90 [ 25.998319] do_writev+0xfc/0x2a0 [ 26.001743] ? do_writev+0xfc/0x2a0 [ 26.005341] ? vfs_writev+0x340/0x340 [ 26.009129] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 26.013944] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.018934] SyS_writev+0x27/0x30 [ 26.022381] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 26.027107] RIP: 0033:0x445109 [ 26.030279] RSP: 002b:00007ffda1ba2f88 EFLAGS: 00000217 ORIG_RAX: 0000000000000014 [ 26.037955] RAX: ffffffffffffffda RBX: 00000000004a6952 RCX: 0000000000445109 [ 26.045196] RDX: 0000000000000006 RSI: 0000000020935fa0 RDI: 0000000000000004 [ 26.052435] RBP: 00007ffda1ba3088 R08: 0000000020ae0000 R09: 0000000020ae0000 [ 26.059678] R10: 0000000020ae0000 R11: 0000000000000217 R12: 00007ffda1ba3088 [ 26.066917] R13: 0000000000402610 R14: 0000000000000000 R15: 0000000000000000 [ 26.074165] 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 [ 26.093239] RIP: skb_panic+0x162/0x1f0 RSP: ffff8801d944f840 [ 26.099321] ---[ end trace 052c7e8774169f4b ]--- [ 26.104154] Kernel panic - not syncing: Fatal exception [ 26.109999] Dumping ftrace buffer: [ 26.113514] (ftrace buffer empty) [ 26.117197] Kernel Offset: disabled [ 26.120804] Rebooting in 86400 seconds..