[....] Starting enhanced syslogd: rsyslogd[ 12.754617] audit: type=1400 audit(1516048681.343:5): avc: denied { syslog } for pid=3504 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: [ 20.183454] audit: type=1400 audit(1516048688.772:6): 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 '10.128.15.225' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 26.383345] audit: type=1400 audit(1516048694.972:7): avc: denied { map } for pid=3659 comm="syzkaller782086" path="/root/syzkaller782086924" 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 [ 26.640100] ip (3726) used greatest stack depth: 16992 bytes left [ 26.673477] 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 [ 27.028543] skbuff: skb_under_panic: text:00000000de6dcf34 len:31 put:24 head:00000000b5dc57c6 data:000000003a772092 tail:0x7 end:0xc0 dev:gre0 [ 27.041753] ------------[ cut here ]------------ [ 27.046491] kernel BUG at net/core/skbuff.c:104! [ 27.051297] invalid opcode: 0000 [#1] SMP KASAN [ 27.055950] Dumping ftrace buffer: [ 27.059472] (ftrace buffer empty) [ 27.063175] Modules linked in: [ 27.066351] CPU: 0 PID: 3659 Comm: syzkaller782086 Not tainted 4.15.0-rc7-mm1+ #56 [ 27.074051] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.083394] RIP: 0010:skb_panic+0x162/0x1f0 [ 27.087690] RSP: 0018:ffff8801bc2af840 EFLAGS: 00010282 [ 27.093034] RAX: 0000000000000083 RBX: ffff8801d4ef2800 RCX: 0000000000000000 [ 27.100288] RDX: 0000000000000083 RSI: 1ffff10037855e92 RDI: ffffed0037855efc [ 27.107713] RBP: ffff8801bc2af8a8 R08: 1ffff10037855e8a R09: 0000000000000000 [ 27.114979] R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff862001e0 [ 27.122267] R13: ffffffff84a9161d R14: 0000000000000018 R15: ffff8801d2d14140 [ 27.129532] FS: 0000000000c85880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 27.137749] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.143607] CR2: 00000000208bc000 CR3: 00000001d9194004 CR4: 00000000001606f0 [ 27.150855] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.158100] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.165341] Call Trace: [ 27.167911] ? report_usercopy+0xd0/0xd0 [ 27.171950] ? ipgre_header+0x6d/0x4e0 [ 27.175811] skb_push+0xce/0xf0 [ 27.179065] ipgre_header+0x6d/0x4e0 [ 27.182759] pppoe_sendmsg+0x58e/0x8b0 [ 27.186624] ? prepare_fb_xmit+0x990/0x990 [ 27.190831] ? pppoe_getname+0x210/0x210 [ 27.194868] ? selinux_socket_sendmsg+0x36/0x40 [ 27.199525] ? security_socket_sendmsg+0x89/0xb0 [ 27.204256] ? pppoe_getname+0x210/0x210 [ 27.208293] sock_sendmsg+0xca/0x110 [ 27.211992] sock_write_iter+0x31a/0x5d0 [ 27.216037] ? sock_sendmsg+0x110/0x110 [ 27.219987] ? bpf_fd_pass+0x280/0x280 [ 27.223846] ? __might_sleep+0x4c/0x190 [ 27.227795] do_iter_readv_writev+0x525/0x7f0 [ 27.232273] ? vfs_dedupe_file_range+0x8f0/0x8f0 [ 27.237012] ? rw_verify_area+0xe5/0x2b0 [ 27.241046] do_iter_write+0x154/0x540 [ 27.244911] ? dup_iter+0x260/0x260 [ 27.248514] vfs_writev+0x18a/0x340 [ 27.252114] ? __fget_light+0x297/0x380 [ 27.256062] ? vfs_iter_write+0xb0/0xb0 [ 27.260025] ? up_read+0x1a/0x40 [ 27.263366] ? __do_page_fault+0x3d6/0xc90 [ 27.267579] ? mm_fault_error+0x2c0/0x2c0 [ 27.271712] ? __fdget_pos+0x130/0x190 [ 27.275579] ? __fdget_raw+0x20/0x20 [ 27.279282] ? __do_page_fault+0xc90/0xc90 [ 27.283495] do_writev+0xfc/0x2a0 [ 27.286920] ? do_writev+0xfc/0x2a0 [ 27.290520] ? vfs_writev+0x340/0x340 [ 27.294294] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 27.299113] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.304107] SyS_writev+0x27/0x30 [ 27.307563] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 27.312311] RIP: 0033:0x445009 [ 27.315474] RSP: 002b:00007ffe62e26248 EFLAGS: 00000217 ORIG_RAX: 0000000000000014 [ 27.323155] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000445009 [ 27.330413] RDX: 0000000000000001 RSI: 0000000020211f90 RDI: 0000000000000004 [ 27.337680] RBP: 00007ffe62e26348 R08: 0000000020adffb2 R09: 0000000020adffb2 [ 27.344954] R10: 0000000020adffb2 R11: 0000000000000217 R12: 00007ffe62e26348 [ 27.352219] R13: 0000000000402510 R14: 0000000000000000 R15: 0000000000000000 [ 27.359476] 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 [ 27.378569] RIP: skb_panic+0x162/0x1f0 RSP: ffff8801bc2af840 [ 27.384549] ---[ end trace 36743bef732eba8a ]--- [ 27.389572] Kernel panic - not syncing: Fatal exception [ 27.395342] Dumping ftrace buffer: [ 27.398870] (ftrace buffer empty) [ 27.402569] Kernel Offset: disabled [ 27.406186] Rebooting in 86400 seconds..