serialport: Connected to syzkaller.us-central1-c.ci-upstream-kasan-gce-0 port 1 (session ID: 56b2619c641ac86e3fa8d41694a8e6f5e88b1690d3a291946aaab56e1ca36594, active connections: 1). 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-kasan-gce-0,10.128.0.53' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 23.491815] netlink: 13 bytes leftover after parsing attributes in process `syzkaller008768'. [ 23.493315] kasan: CONFIG_KASAN_INLINE enabled [ 23.494247] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 23.495371] general protection fault: 0000 [#1] SMP KASAN [ 23.496257] Dumping ftrace buffer: [ 23.496889] (ftrace buffer empty) [ 23.497501] Modules linked in: [ 23.497960] CPU: 1 PID: 2916 Comm: syzkaller008768 Not tainted 4.13.0-rc4+ #23 [ 23.498957] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.500249] task: ffff8801d2ec67c0 task.stack: ffff8801c1628000 [ 23.501090] RIP: 0010:fib_dump_info+0x3aa/0x13b0 [ 23.501842] RSP: 0018:ffff8801c162eeb0 EFLAGS: 00010206 [ 23.502809] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 23.503898] RDX: 0000000000000006 RSI: 0000000000000002 RDI: 0000000000000030 [ 23.504961] RBP: ffff8801c162f108 R08: ffffed003a35e1c9 R09: ffffed003a35e1c9 [ 23.506233] R10: 0000000000000001 R11: ffffed003a35e1c8 R12: ffff8801d1af0e35 [ 23.507396] R13: 0000000000000000 R14: ffff8801d1af0e24 R15: ffff8801d2e763c0 [ 23.508469] FS: 00000000025a6880(0000) GS:ffff8801dc100000(0000) knlGS:0000000000000000 [ 23.509676] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.510635] CR2: 0000000020b9fff0 CR3: 00000001d1855000 CR4: 00000000001406e0 [ 23.511843] Call Trace: [ 23.514106] ? ip_route_input_noref+0x1e0/0x1e0 [ 23.518771] ? kmem_cache_alloc_node_trace+0x323/0x710 [ 23.524040] ? fib_create_info+0x3880/0x3880 [ 23.528437] ? __kmalloc_node_track_caller+0x47/0x70 [ 23.533535] ? memset+0x31/0x40 [ 23.536804] ? lock_acquire+0x1d5/0x580 [ 23.540771] ? lock_acquire+0x1d5/0x580 [ 23.544736] ? inet_rtm_getroute+0xaa0/0x2d40 [ 23.549247] ? lock_release+0xa40/0xa40 [ 23.553209] ? nla_parse+0x29a/0x3d0 [ 23.556924] inet_rtm_getroute+0xfb7/0x2d40 [ 23.561235] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 23.566438] ? ipv4_sk_update_pmtu+0xa90/0xa90 [ 23.571009] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 23.576186] ? lock_acquire+0x1d5/0x580 [ 23.580127] ? lock_acquire+0x1d5/0x580 [ 23.584067] ? rtnetlink_rcv+0x1b/0x40 [ 23.587919] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 23.593074] ? lock_release+0xa40/0xa40 [ 23.597022] ? check_same_owner+0x320/0x320 [ 23.601311] ? do_raw_spin_trylock+0x190/0x190 [ 23.605859] ? __might_sleep+0x95/0x190 [ 23.609797] ? rtnetlink_rcv+0x1b/0x40 [ 23.613660] ? __mutex_lock+0x16f/0x1870 [ 23.617683] ? rtnetlink_rcv+0x1b/0x40 [ 23.621544] ? rtnetlink_rcv+0x1b/0x40 [ 23.625402] ? netlink_lookup+0x5f7/0xa90 [ 23.629525] ? netlink_lookup+0x620/0xa90 [ 23.633640] ? ipv4_sk_update_pmtu+0xa90/0xa90 [ 23.638190] rtnetlink_rcv_msg+0x5ea/0x840 [ 23.642402] ? rtnl_newlink+0x1b00/0x1b00 [ 23.646516] ? netlink_deliver_tap+0x176/0xa60 [ 23.651066] ? iov_iter_advance+0x2a1/0x13f0 [ 23.655442] ? sock_has_perm+0x29c/0x400 [ 23.659475] netlink_rcv_skb+0x216/0x440 [ 23.663509] ? rtnl_newlink+0x1b00/0x1b00 [ 23.667626] ? netlink_ack+0xab0/0xab0 [ 23.671478] ? netlink_skb_destructor+0x1d0/0x1d0 [ 23.676299] rtnetlink_rcv+0x2a/0x40 [ 23.679975] netlink_unicast+0x4e8/0x6f0 [ 23.684002] ? netlink_attachskb+0x8a0/0x8a0 [ 23.688378] ? security_netlink_send+0x81/0xb0 [ 23.692933] netlink_sendmsg+0xa4a/0xe60 [ 23.696972] ? netlink_unicast+0x6f0/0x6f0 [ 23.701173] ? security_socket_sendmsg+0x89/0xb0 [ 23.705892] ? netlink_unicast+0x6f0/0x6f0 [ 23.710107] sock_sendmsg+0xca/0x110 [ 23.713786] sock_write_iter+0x31a/0x5d0 [ 23.717809] ? sock_sendmsg+0x110/0x110 [ 23.721751] ? selinux_capset+0x100/0x100 [ 23.725865] ? ___might_sleep+0x41c/0x470 [ 23.729980] do_iter_readv_writev+0x525/0x7f0 [ 23.734454] ? vfs_dedupe_file_range+0x900/0x900 [ 23.739178] ? rw_verify_area+0xe5/0x2b0 [ 23.743204] do_iter_write+0x154/0x540 [ 23.747055] ? dup_iter+0x260/0x260 [ 23.750651] vfs_writev+0x18a/0x340 [ 23.754259] ? __fget_light+0x297/0x380 [ 23.758199] ? vfs_iter_write+0xb0/0xb0 [ 23.762137] ? lock_acquire+0x1d5/0x580 [ 23.766075] ? lock_acquire+0x1d5/0x580 [ 23.770031] ? __fdget_pos+0x130/0x190 [ 23.773891] ? __fdget_raw+0x20/0x20 [ 23.777573] ? down_read_trylock+0xdb/0x170 [ 23.781861] do_writev+0xfc/0x2a0 [ 23.785281] ? do_writev+0xfc/0x2a0 [ 23.788874] ? vfs_writev+0x340/0x340 [ 23.792641] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 23.797462] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.802443] SyS_writev+0x27/0x30 [ 23.805863] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 23.810583] RIP: 0033:0x43fd19 [ 23.813737] RSP: 002b:00007ffdae437288 EFLAGS: 00000203 ORIG_RAX: 0000000000000014 [ 23.821410] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd19 [ 23.828644] RDX: 0000000000000001 RSI: 0000000020b9fff0 RDI: 0000000000000003 [ 23.835878] RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000 [ 23.843112] R10: 0000000000000000 R11: 0000000000000203 R12: 0000000000401680 [ 23.850346] R13: 0000000000401710 R14: 0000000000000000 R15: 0000000000000000 [ 23.857588] 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 ba 0f 00 00 48 8b 45 28 44 [ 23.876655] RIP: fib_dump_info+0x3aa/0x13b0 RSP: ffff8801c162eeb0 [ 23.882971] ---[ end trace 19a6ac07399e2ce1 ]--- [ 23.887719] Kernel panic - not syncing: Fatal exception [ 23.893090] Dumping ftrace buffer: [ 23.896611] (ftrace buffer empty) [ 23.900296] Kernel Offset: disabled [ 23.903894] Rebooting in 86400 seconds..