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-0,10.128.0.35' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 32.491453] netlink: 13 bytes leftover after parsing attributes in process `syzkaller083781'. [ 32.493164] kasan: CONFIG_KASAN_INLINE enabled [ 32.493872] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 32.495101] general protection fault: 0000 [#1] SMP KASAN [ 32.495850] Dumping ftrace buffer: [ 32.496432] (ftrace buffer empty) [ 32.497011] Modules linked in: [ 32.497504] CPU: 1 PID: 2916 Comm: syzkaller083781 Not tainted 4.13.0-rc4+ #26 [ 32.498621] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.499935] task: ffff8801d280c1c0 task.stack: ffff8801d2988000 [ 32.500765] RIP: 0010:fib_dump_info+0x3aa/0x13b0 [ 32.501395] RSP: 0018:ffff8801d298eeb0 EFLAGS: 00010206 [ 32.502191] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 32.503217] RDX: 0000000000000006 RSI: 0000000000000002 RDI: 0000000000000030 [ 32.504351] RBP: ffff8801d298f108 R08: ffffed003a2a1439 R09: ffffed003a2a1439 [ 32.505433] R10: 0000000000000001 R11: ffffed003a2a1438 R12: ffff8801d150a1b5 [ 32.506405] R13: 0000000000000000 R14: ffff8801d150a1a4 R15: ffff8801d1ff9940 [ 32.507357] FS: 0000000002109880(0000) GS:ffff8801dc100000(0000) knlGS:0000000000000000 [ 32.508479] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.509270] CR2: 0000000020b9fff0 CR3: 00000001d1a4c000 CR4: 00000000001406e0 [ 32.510295] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.511380] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.517302] Call Trace: [ 32.519863] ? ip_route_input_noref+0x1e0/0x1e0 [ 32.524504] ? kmem_cache_alloc_node_trace+0x323/0x710 [ 32.529751] ? fib_create_info+0x3880/0x3880 [ 32.534215] ? __kmalloc_node_track_caller+0x47/0x70 [ 32.540512] ? memset+0x31/0x40 [ 32.543773] ? lock_acquire+0x1d5/0x580 [ 32.547713] ? lock_acquire+0x1d5/0x580 [ 32.551656] ? inet_rtm_getroute+0xaa0/0x2d40 [ 32.556121] ? lock_release+0xa40/0xa40 [ 32.560063] ? nla_parse+0x29a/0x3d0 [ 32.563751] ? check_noncircular+0x20/0x20 [ 32.567999] inet_rtm_getroute+0xfb7/0x2d40 [ 32.572297] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 32.577460] ? ipv4_sk_update_pmtu+0xa90/0xa90 [ 32.582018] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 32.587182] ? lock_acquire+0x1d5/0x580 [ 32.591121] ? lock_acquire+0x1d5/0x580 [ 32.595064] ? rtnetlink_rcv+0x1b/0x40 [ 32.598926] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 32.604102] ? lock_release+0xa40/0xa40 [ 32.608051] ? check_same_owner+0x320/0x320 [ 32.612340] ? do_raw_spin_trylock+0x190/0x190 [ 32.616894] ? __might_sleep+0x95/0x190 [ 32.620837] ? rtnetlink_rcv+0x1b/0x40 [ 32.624693] ? __mutex_lock+0x16f/0x1870 [ 32.628719] ? rtnetlink_rcv+0x1b/0x40 [ 32.632576] ? rtnetlink_rcv+0x1b/0x40 [ 32.636446] ? netlink_lookup+0x5f7/0xa90 [ 32.640578] ? netlink_lookup+0x620/0xa90 [ 32.644695] ? ipv4_sk_update_pmtu+0xa90/0xa90 [ 32.649344] rtnetlink_rcv_msg+0x5ea/0x840 [ 32.653547] ? rtnl_newlink+0x1b00/0x1b00 [ 32.657672] ? netlink_deliver_tap+0x176/0xa60 [ 32.662240] ? iov_iter_advance+0x2a1/0x13f0 [ 32.666616] netlink_rcv_skb+0x216/0x440 [ 32.670642] ? rtnl_newlink+0x1b00/0x1b00 [ 32.674765] ? netlink_ack+0xab0/0xab0 [ 32.678621] ? netlink_skb_destructor+0x1d0/0x1d0 [ 32.683432] rtnetlink_rcv+0x2a/0x40 [ 32.687112] netlink_unicast+0x4e8/0x6f0 [ 32.691144] ? netlink_attachskb+0x8a0/0x8a0 [ 32.695525] ? security_netlink_send+0x81/0xb0 [ 32.700074] netlink_sendmsg+0xa4a/0xe60 [ 32.704105] ? netlink_unicast+0x6f0/0x6f0 [ 32.708314] ? security_socket_sendmsg+0x89/0xb0 [ 32.713046] ? netlink_unicast+0x6f0/0x6f0 [ 32.717255] sock_sendmsg+0xca/0x110 [ 32.720937] sock_write_iter+0x31a/0x5d0 [ 32.724970] ? sock_sendmsg+0x110/0x110 [ 32.728919] ? selinux_capset+0x100/0x100 [ 32.733033] ? ___might_sleep+0x41c/0x470 [ 32.737148] do_iter_readv_writev+0x525/0x7f0 [ 32.741613] ? vfs_dedupe_file_range+0x900/0x900 [ 32.746338] ? rw_verify_area+0xe5/0x2b0 [ 32.750379] do_iter_write+0x154/0x540 [ 32.754234] ? dup_iter+0x260/0x260 [ 32.757842] vfs_writev+0x18a/0x340 [ 32.761439] ? __fget_light+0x297/0x380 [ 32.765383] ? vfs_iter_write+0xb0/0xb0 [ 32.769327] ? lock_acquire+0x1d5/0x580 [ 32.773269] ? lock_acquire+0x1d5/0x580 [ 32.777218] ? __fdget_pos+0x130/0x190 [ 32.781068] ? __fdget_raw+0x20/0x20 [ 32.784751] ? down_read_trylock+0xdb/0x170 [ 32.789042] do_writev+0xfc/0x2a0 [ 32.792462] ? do_writev+0xfc/0x2a0 [ 32.796057] ? vfs_writev+0x340/0x340 [ 32.799825] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 32.804645] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 32.809628] SyS_writev+0x27/0x30 [ 32.813046] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 32.817768] RIP: 0033:0x43fd19 [ 32.820941] RSP: 002b:00007ffd6c992688 EFLAGS: 00000203 ORIG_RAX: 0000000000000014 [ 32.828620] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd19 [ 32.835859] RDX: 0000000000000001 RSI: 0000000020b9fff0 RDI: 0000000000000003 [ 32.843106] RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000 [ 32.850617] R10: 0000000000000000 R11: 0000000000000203 R12: 0000000000401680 [ 32.857872] R13: 0000000000401710 R14: 0000000000000000 R15: 0000000000000000 [ 32.865115] 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 [ 32.884178] RIP: fib_dump_info+0x3aa/0x13b0 RSP: ffff8801d298eeb0 [ 32.890430] ---[ end trace 7b9b01b24018bfab ]--- [ 32.895166] Kernel panic - not syncing: Fatal exception [ 32.900906] Dumping ftrace buffer: [ 32.904422] (ftrace buffer empty) [ 32.908108] Kernel Offset: disabled [ 32.911796] Rebooting in 86400 seconds..