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-0,10.128.0.38' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.164720] netlink: 13 bytes leftover after parsing attributes in process `syzkaller255709'. [ 43.166066] kasan: CONFIG_KASAN_INLINE enabled [ 43.166695] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 43.167810] general protection fault: 0000 [#1] SMP KASAN [ 43.168557] Dumping ftrace buffer: [ 43.169030] (ftrace buffer empty) [ 43.169521] Modules linked in: [ 43.170002] CPU: 1 PID: 3029 Comm: syzkaller255709 Not tainted 4.13.0-rc5-next-20170817+ #5 [ 43.171123] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.172371] task: ffff8801cf668080 task.stack: ffff8801cf2f0000 [ 43.173191] RIP: 0010:fib_dump_info+0x3aa/0x1470 [ 43.173818] RSP: 0018:ffff8801cf2f6c08 EFLAGS: 00010206 [ 43.174526] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 43.175599] RDX: 0000000000000006 RSI: 0000000000000002 RDI: 0000000000000030 [ 43.176549] RBP: ffff8801cf2f6e60 R08: ffffed0039ef8cf9 R09: ffffed0039ef8cf9 [ 43.177520] R10: 0000000000000001 R11: ffffed0039ef8cf8 R12: ffff8801cf7c67b5 [ 43.178490] R13: 0000000000000000 R14: ffff8801cf7c67a4 R15: ffff8801cf6e6ac0 [ 43.179442] FS: 00000000015e5880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 43.180513] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.181310] CR2: 0000000020b9fff0 CR3: 00000001cf150000 CR4: 00000000001406e0 [ 43.182262] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.183211] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.184175] Call Trace: [ 43.184530] ? ip_route_input_noref+0x1e0/0x1e0 [ 43.187377] ? fib_create_info+0x38c0/0x38c0 [ 43.191753] ? __kmalloc_node_track_caller+0x47/0x70 [ 43.196821] ? memset+0x31/0x40 [ 43.200063] ? __alloc_skb+0x548/0x740 [ 43.203914] ? lock_acquire+0x1d5/0x580 [ 43.207850] ? lock_acquire+0x1d5/0x580 [ 43.211788] ? inet_rtm_getroute+0xaa0/0x2d60 [ 43.216255] ? lock_release+0xa40/0xa40 [ 43.220192] ? nla_parse+0x29a/0x3d0 [ 43.223875] inet_rtm_getroute+0xf9c/0x2d60 [ 43.228168] ? ipv4_sk_update_pmtu+0xa90/0xa90 [ 43.232716] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 43.237874] ? __lock_acquire+0x6aa/0x3bc0 [ 43.242075] ? __lock_acquire+0x6aa/0x3bc0 [ 43.246279] ? check_noncircular+0x20/0x20 [ 43.250478] ? __lock_acquire+0x6aa/0x3bc0 [ 43.254680] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 43.259832] ? find_held_lock+0x35/0x1d0 [ 43.263869] ? check_noncircular+0x20/0x20 [ 43.268073] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 43.273235] ? __lock_acquire+0x6aa/0x3bc0 [ 43.277438] ? find_held_lock+0x35/0x1d0 [ 43.281480] ? ipv4_sk_update_pmtu+0xa90/0xa90 [ 43.286026] rtnetlink_rcv_msg+0x51c/0x1090 [ 43.290313] ? rtnl_calcit.isra.23+0x4f0/0x4f0 [ 43.294857] ? trace_hardirqs_on+0xd/0x10 [ 43.298972] ? check_noncircular+0x20/0x20 [ 43.303175] ? find_held_lock+0x35/0x1d0 [ 43.307205] ? netlink_lookup+0x5f7/0xa90 [ 43.311320] ? find_held_lock+0x35/0x1d0 [ 43.315350] ? ipv4_sk_update_pmtu+0xa90/0xa90 [ 43.319898] ? lock_downgrade+0x990/0x990 [ 43.324009] ? lock_release+0xa40/0xa40 [ 43.327950] ? netlink_lookup+0x620/0xa90 [ 43.332059] ? ipv4_sk_update_pmtu+0xa90/0xa90 [ 43.336605] ? netlink_connect+0x4e0/0x4e0 [ 43.340804] ? netlink_deliver_tap+0x176/0xa60 [ 43.345351] ? iov_iter_advance+0x2a1/0x13f0 [ 43.349727] netlink_rcv_skb+0x216/0x440 [ 43.353752] ? rtnl_calcit.isra.23+0x4f0/0x4f0 [ 43.358298] ? netlink_ack+0xab0/0xab0 [ 43.362151] ? netlink_skb_destructor+0x1d0/0x1d0 [ 43.366959] ? selinux_nlmsg_lookup+0x32b/0x430 [ 43.371592] rtnetlink_rcv+0x1c/0x20 [ 43.375267] netlink_unicast+0x4e8/0x6f0 [ 43.379292] ? netlink_attachskb+0x8a0/0x8a0 [ 43.383666] ? security_netlink_send+0x81/0xb0 [ 43.388216] netlink_sendmsg+0xa4a/0xe60 [ 43.392248] ? netlink_unicast+0x6f0/0x6f0 [ 43.396447] ? security_socket_sendmsg+0x89/0xb0 [ 43.401169] ? netlink_unicast+0x6f0/0x6f0 [ 43.405369] sock_sendmsg+0xca/0x110 [ 43.409046] sock_write_iter+0x31a/0x5d0 [ 43.413112] ? sock_sendmsg+0x110/0x110 [ 43.417054] ? selinux_capset+0x100/0x100 [ 43.421164] ? __might_sleep+0x4c/0x190 [ 43.425103] do_iter_readv_writev+0x525/0x7f0 [ 43.429569] ? vfs_dedupe_file_range+0x900/0x900 [ 43.434289] ? rw_verify_area+0xe5/0x2b0 [ 43.438314] do_iter_write+0x154/0x540 [ 43.442163] ? dup_iter+0x260/0x260 [ 43.445753] ? __pmd_alloc+0x4e0/0x4e0 [ 43.449612] ? __lock_is_held+0xb6/0x140 [ 43.453639] vfs_writev+0x18a/0x340 [ 43.457229] ? __fget_light+0x297/0x380 [ 43.461252] ? vfs_iter_write+0xb0/0xb0 [ 43.465191] ? handle_mm_fault+0x23e/0x940 [ 43.469400] ? __fdget_pos+0x130/0x190 [ 43.473250] ? __fdget_raw+0x20/0x20 [ 43.476927] ? handle_mm_fault+0x4e3/0x940 [ 43.481125] ? down_read_trylock+0xdb/0x170 [ 43.485413] do_writev+0xfc/0x2a0 [ 43.488828] ? do_writev+0xfc/0x2a0 [ 43.492422] ? vfs_writev+0x340/0x340 [ 43.496188] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 43.500993] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 43.505973] SyS_writev+0x27/0x30 [ 43.509390] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 43.514109] RIP: 0033:0x43fd19 [ 43.517261] RSP: 002b:00007ffdcd4f20f8 EFLAGS: 00000203 ORIG_RAX: 0000000000000014 [ 43.524971] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd19 [ 43.532207] RDX: 0000000000000001 RSI: 0000000020b9fff0 RDI: 0000000000000003 [ 43.539440] RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000 [ 43.546673] R10: 0000000000000000 R11: 0000000000000203 R12: 0000000000401680 [ 43.553912] R13: 0000000000401710 R14: 0000000000000000 R15: 0000000000000000 [ 43.561153] 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 [ 43.580228] RIP: fib_dump_info+0x3aa/0x1470 RSP: ffff8801cf2f6c08 [ 43.586466] ---[ end trace acd0a3c53d7617ab ]--- [ 43.591197] Kernel panic - not syncing: Fatal exception [ 43.596554] Dumping ftrace buffer: [ 43.600059] (ftrace buffer empty) [ 43.603734] Kernel Offset: disabled [ 43.607324] Rebooting in 86400 seconds..