INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-upstream-next-kasan-gce-4,10.128.15.210' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 50.999133] netlink: 13 bytes leftover after parsing attributes in process `syzkaller884563'. [ 51.000499] kasan: CONFIG_KASAN_INLINE enabled [ 51.001221] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 51.002217] general protection fault: 0000 [#1] SMP KASAN [ 51.002950] Dumping ftrace buffer: [ 51.003423] (ftrace buffer empty) [ 51.003914] Modules linked in: [ 51.004346] CPU: 1 PID: 2935 Comm: syzkaller884563 Not tainted 4.13.0-rc4-next-20170811 #1 [ 51.005506] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.006722] task: ffff8801d0a2c740 task.stack: ffff8801d0b20000 [ 51.007549] RIP: 0010:fib_dump_info+0x3aa/0x1470 [ 51.008177] RSP: 0018:ffff8801d0b26c08 EFLAGS: 00010206 [ 51.008883] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 51.009863] RDX: 0000000000000006 RSI: 0000000000000002 RDI: 0000000000000030 [ 51.010859] RBP: ffff8801d0b26e60 R08: ffffed003a02ec61 R09: ffffed003a02ec61 [ 51.011818] R10: 0000000000000001 R11: ffffed003a02ec60 R12: ffff8801d01762f5 [ 51.012925] R13: 0000000000000000 R14: ffff8801d01762e4 R15: ffff8801cf97aa00 [ 51.013936] FS: 0000000001c49880(0000) GS:ffff8801dc100000(0000) knlGS:0000000000000000 [ 51.015127] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 51.015986] CR2: 0000000020b9fff0 CR3: 00000001d00f5000 CR4: 00000000001406e0 [ 51.016970] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 51.018120] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 51.019160] Call Trace: [ 51.019542] ? ip_route_input_noref+0x1e0/0x1e0 [ 51.024192] ? kmem_cache_alloc_node_trace+0x323/0x710 [ 51.029456] ? fib_create_info+0x3870/0x3870 [ 51.033858] ? __kmalloc_node_track_caller+0x47/0x70 [ 51.038950] ? memset+0x31/0x40 [ 51.042215] ? __alloc_skb+0x548/0x740 [ 51.046094] ? lock_acquire+0x1d5/0x580 [ 51.050052] ? lock_acquire+0x1d5/0x580 [ 51.054014] ? inet_rtm_getroute+0xaa0/0x2d40 [ 51.058496] ? lock_release+0xa40/0xa40 [ 51.062456] ? nla_parse+0x29a/0x3d0 [ 51.066165] inet_rtm_getroute+0xfb7/0x2d40 [ 51.070476] ? rtnetlink_rcv_msg+0x65c/0x1090 [ 51.074966] ? ipv4_sk_update_pmtu+0xa90/0xa90 [ 51.079543] ? __might_sleep+0x95/0x190 [ 51.083501] ? rtnetlink_rcv_msg+0x65c/0x1090 [ 51.087985] ? __mutex_lock+0x16f/0x1870 [ 51.092499] ? rtnetlink_rcv_msg+0x65c/0x1090 [ 51.096966] ? rtnetlink_rcv_msg+0x65c/0x1090 [ 51.101453] ? mutex_lock_io_nested+0x1740/0x1740 [ 51.106266] ? __lock_acquire+0x6aa/0x3bc0 [ 51.110469] ? check_noncircular+0x20/0x20 [ 51.114670] ? __lock_acquire+0x6aa/0x3bc0 [ 51.118885] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 51.124048] ? find_held_lock+0x35/0x1d0 [ 51.128091] ? check_noncircular+0x20/0x20 [ 51.132295] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 51.137460] ? __lock_acquire+0x6aa/0x3bc0 [ 51.141668] ? check_noncircular+0x20/0x20 [ 51.145887] ? ipv4_sk_update_pmtu+0xa90/0xa90 [ 51.150481] rtnetlink_rcv_msg+0x733/0x1090 [ 51.154796] ? rtnl_calcit.isra.23+0x4f0/0x4f0 [ 51.159377] ? trace_hardirqs_on+0xd/0x10 [ 51.163512] ? check_noncircular+0x20/0x20 [ 51.167731] ? find_held_lock+0x35/0x1d0 [ 51.171770] ? netlink_lookup+0x5f7/0xa90 [ 51.175896] ? find_held_lock+0x35/0x1d0 [ 51.179931] ? ipv4_sk_update_pmtu+0xa90/0xa90 [ 51.184500] ? lock_downgrade+0x990/0x990 [ 51.188637] ? lock_release+0xa40/0xa40 [ 51.192584] ? netlink_lookup+0x620/0xa90 [ 51.196701] ? ipv4_sk_update_pmtu+0xa90/0xa90 [ 51.201246] ? netlink_connect+0x4e0/0x4e0 [ 51.205461] ? netlink_deliver_tap+0x176/0xa60 [ 51.210010] ? iov_iter_advance+0x2a1/0x13f0 [ 51.214391] ? sock_has_perm+0x29c/0x400 [ 51.218420] netlink_rcv_skb+0x216/0x440 [ 51.222449] ? rtnl_calcit.isra.23+0x4f0/0x4f0 [ 51.227013] ? netlink_ack+0xab0/0xab0 [ 51.230873] ? netlink_skb_destructor+0x1d0/0x1d0 [ 51.235693] ? selinux_nlmsg_lookup+0x32b/0x430 [ 51.240334] rtnetlink_rcv+0x1c/0x20 [ 51.244016] netlink_unicast+0x4e8/0x6f0 [ 51.248050] ? netlink_attachskb+0x8a0/0x8a0 [ 51.252428] ? security_netlink_send+0x81/0xb0 [ 51.256979] netlink_sendmsg+0xa4a/0xe60 [ 51.261014] ? netlink_unicast+0x6f0/0x6f0 [ 51.265222] ? security_socket_sendmsg+0x89/0xb0 [ 51.269945] ? netlink_unicast+0x6f0/0x6f0 [ 51.274156] sock_sendmsg+0xca/0x110 [ 51.277836] sock_write_iter+0x31a/0x5d0 [ 51.281864] ? sock_sendmsg+0x110/0x110 [ 51.285811] ? selinux_capset+0x100/0x100 [ 51.289929] ? ___might_sleep+0x45c/0x470 [ 51.294049] do_iter_readv_writev+0x525/0x7f0 [ 51.298514] ? vfs_dedupe_file_range+0x900/0x900 [ 51.303242] ? rw_verify_area+0xe5/0x2b0 [ 51.307277] do_iter_write+0x154/0x540 [ 51.311132] ? dup_iter+0x260/0x260 [ 51.314730] vfs_writev+0x18a/0x340 [ 51.318324] ? __fget_light+0x297/0x380 [ 51.322266] ? vfs_iter_write+0xb0/0xb0 [ 51.326208] ? lock_acquire+0x1d5/0x580 [ 51.330149] ? lock_acquire+0x1d5/0x580 [ 51.334099] ? __fdget_pos+0x130/0x190 [ 51.337951] ? __fdget_raw+0x20/0x20 [ 51.341636] ? down_read_trylock+0xdb/0x170 [ 51.345950] do_writev+0xfc/0x2a0 [ 51.349378] ? do_writev+0xfc/0x2a0 [ 51.352977] ? vfs_writev+0x340/0x340 [ 51.356788] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 51.361598] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 51.366581] SyS_writev+0x27/0x30 [ 51.370001] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 51.374736] RIP: 0033:0x43fd19 [ 51.377903] RSP: 002b:00007ffd0ee96688 EFLAGS: 00000203 ORIG_RAX: 0000000000000014 [ 51.385573] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd19 [ 51.392810] RDX: 0000000000000001 RSI: 0000000020b9fff0 RDI: 0000000000000003 [ 51.400045] RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000 [ 51.407290] R10: 0000000000000000 R11: 0000000000000203 R12: 0000000000401680 [ 51.414535] R13: 0000000000401710 R14: 0000000000000000 R15: 0000000000000000 [ 51.421781] Code: 0f b6 b5 e4 fd ff ff 48 8b 85 f0 fd ff ff 40 88 70 17 48 8b 45 28 48 8d 78 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 8d 0e 00 00 48 8b 45 28 44 [ 51.440859] RIP: fib_dump_info+0x3aa/0x1470 RSP: ffff8801d0b26c08 [ 51.447173] ---[ end trace f7421809f7558a51 ]--- [ 51.451917] Kernel panic - not syncing: Fatal exception [ 51.457277] Dumping ftrace buffer: [ 51.460782] (ftrace buffer empty) [ 51.464456] Kernel Offset: disabled [ 51.468046] Rebooting in 86400 seconds..