[....] Starting enhanced syslogd: rsyslogd[ 13.122964] audit: type=1400 audit(1516050056.010:5): avc: denied { syslog } for pid=3499 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: [ 19.645690] audit: type=1400 audit(1516050062.533:6): avc: denied { map } for pid=3640 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 '10.128.15.214' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 25.893940] audit: type=1400 audit(1516050068.781:7): avc: denied { map } for pid=3654 comm="syzkaller593716" path="/root/syzkaller593716470" 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 [ 26.277283] 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 [ 26.617677] skbuff: skb_under_panic: text:00000000eb682093 len:31 put:24 head:00000000d2727673 data:0000000081fbf0c8 tail:0x7 end:0xc0 dev:gre0 [ 26.630849] ------------[ cut here ]------------ [ 26.635580] kernel BUG at net/core/skbuff.c:104! [ 26.640382] invalid opcode: 0000 [#1] SMP KASAN [ 26.645044] Dumping ftrace buffer: [ 26.648563] (ftrace buffer empty) [ 26.652248] Modules linked in: [ 26.655437] CPU: 1 PID: 3654 Comm: syzkaller593716 Not tainted 4.15.0-rc7+ #190 [ 26.662863] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.672217] RIP: 0010:skb_panic+0x162/0x1f0 [ 26.676512] RSP: 0018:ffff8801bc727840 EFLAGS: 00010282 [ 26.681847] RAX: 0000000000000083 RBX: ffff8801d522e640 RCX: 0000000000000000 [ 26.689089] RDX: 0000000000000083 RSI: 1ffff100378e4ec8 RDI: ffffed00378e4efc [ 26.696329] RBP: ffff8801bc7278a8 R08: 1ffff100378e4e8a R09: 0000000000000000 [ 26.703578] R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff861f9760 [ 26.710818] R13: ffffffff84a4e64d R14: 0000000000000018 R15: ffff8801d320a180 [ 26.718057] FS: 00000000012c6880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 26.726262] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.732123] CR2: 00000000208bc000 CR3: 00000001d9b52004 CR4: 00000000001606e0 [ 26.739368] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.746620] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.753861] Call Trace: [ 26.756426] ? check_stack_object+0x140/0x140 [ 26.760894] ? ipgre_header+0x6d/0x4e0 [ 26.764754] skb_push+0xce/0xf0 [ 26.768009] ipgre_header+0x6d/0x4e0 [ 26.771699] pppoe_sendmsg+0x58e/0x8b0 [ 26.775561] ? prepare_fb_xmit+0x990/0x990 [ 26.779770] ? pppoe_getname+0x210/0x210 [ 26.783806] ? selinux_socket_sendmsg+0x36/0x40 [ 26.788456] ? security_socket_sendmsg+0x89/0xb0 [ 26.793182] ? pppoe_getname+0x210/0x210 [ 26.797214] sock_sendmsg+0xca/0x110 [ 26.800909] sock_write_iter+0x31a/0x5d0 [ 26.805213] ? sock_sendmsg+0x110/0x110 [ 26.809163] ? bpf_fd_pass+0x280/0x280 [ 26.813025] ? __might_sleep+0x6c/0x190 [ 26.816973] do_iter_readv_writev+0x525/0x7f0 [ 26.821450] ? vfs_dedupe_file_range+0x8f0/0x8f0 [ 26.826178] ? rw_verify_area+0xe5/0x2b0 [ 26.830210] do_iter_write+0x154/0x540 [ 26.834079] ? dup_iter+0x260/0x260 [ 26.837683] vfs_writev+0x18a/0x340 [ 26.841281] ? __fget_light+0x297/0x380 [ 26.845226] ? vfs_iter_write+0xb0/0xb0 [ 26.849183] ? up_read+0x1a/0x40 [ 26.852523] ? __do_page_fault+0x3d6/0xc90 [ 26.856733] ? mm_fault_error+0x2c0/0x2c0 [ 26.860854] ? __fdget_pos+0x130/0x190 [ 26.864712] ? __fdget_raw+0x20/0x20 [ 26.868397] ? __do_page_fault+0xc90/0xc90 [ 26.872604] do_writev+0xfc/0x2a0 [ 26.876032] ? do_writev+0xfc/0x2a0 [ 26.879641] ? vfs_writev+0x340/0x340 [ 26.883500] ? entry_SYSCALL_64_fastpath+0x5/0x9a [ 26.888315] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.893306] SyS_writev+0x27/0x30 [ 26.896732] entry_SYSCALL_64_fastpath+0x23/0x9a [ 26.901458] RIP: 0033:0x445009 [ 26.904621] RSP: 002b:00007ffeffd24058 EFLAGS: 00000217 ORIG_RAX: 0000000000000014 [ 26.912926] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000445009 [ 26.920168] RDX: 0000000000000001 RSI: 0000000020211f90 RDI: 0000000000000004 [ 26.927409] RBP: 00007ffeffd24158 R08: 0000000020adffb2 R09: 0000000020adffb2 [ 26.934652] R10: 0000000020adffb2 R11: 0000000000000217 R12: 00007ffeffd24158 [ 26.941893] R13: 0000000000402510 R14: 0000000000000000 R15: 0000000000000000 [ 26.949152] 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 [ 26.968225] RIP: skb_panic+0x162/0x1f0 RSP: ffff8801bc727840 [ 26.974111] ---[ end trace 69f91fae1380e907 ]--- [ 26.978979] Kernel panic - not syncing: Fatal exception [ 26.984772] Dumping ftrace buffer: [ 26.988285] (ftrace buffer empty) [ 26.991969] Kernel Offset: disabled [ 26.995577] Rebooting in 86400 seconds..