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-net-kasan-gce-7,10.128.15.192' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 41.736821] netlink: 13 bytes leftover after parsing attributes in process `syzkaller954391'. [ 41.738180] kasan: CONFIG_KASAN_INLINE enabled [ 41.738813] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 41.739977] general protection fault: 0000 [#1] SMP KASAN [ 41.740713] Dumping ftrace buffer: [ 41.741186] (ftrace buffer empty) [ 41.741680] Modules linked in: [ 41.742112] CPU: 1 PID: 3002 Comm: syzkaller954391 Not tainted 4.13.0-rc5+ #13 [ 41.743074] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.744324] task: ffff8801d0f622c0 task.stack: ffff8801d1458000 [ 41.745125] RIP: 0010:fib_dump_info+0x3aa/0x1470 [ 41.745754] RSP: 0018:ffff8801d145ec08 EFLAGS: 00010206 [ 41.746477] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 41.747427] RDX: 0000000000000006 RSI: 0000000000000002 RDI: 0000000000000030 [ 41.748378] RBP: ffff8801d145ee60 R08: ffffed003a04a199 R09: ffffed003a04a199 [ 41.749328] R10: 0000000000000001 R11: ffffed003a04a198 R12: ffff8801d0250cb5 [ 41.750301] R13: 0000000000000000 R14: ffff8801d0250ca4 R15: ffff8801d0fea480 [ 41.751252] FS: 00000000022a2880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 41.752373] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.753193] CR2: 0000000020b9fff0 CR3: 00000001c170f000 CR4: 00000000001406e0 [ 41.754145] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.755136] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.756086] Call Trace: [ 41.756446] ? ip_route_input_noref+0x1e0/0x1e0 [ 41.757785] ? fib_create_info+0x38d0/0x38d0 [ 41.762162] ? __kmalloc_node_track_caller+0x47/0x70 [ 41.767239] ? memset+0x31/0x40 [ 41.770491] ? __alloc_skb+0x548/0x740 [ 41.774353] ? lock_acquire+0x1d5/0x580 [ 41.778298] ? lock_acquire+0x1d5/0x580 [ 41.782239] ? inet_rtm_getroute+0xaa0/0x2d60 [ 41.786702] ? lock_release+0xa40/0xa40 [ 41.790645] ? nla_parse+0x29a/0x3d0 [ 41.794326] ? __lock_acquire+0x6ef/0x3dc0 [ 41.798543] inet_rtm_getroute+0xf9c/0x2d60 [ 41.802847] ? ipv4_sk_update_pmtu+0xa90/0xa90 [ 41.807402] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 41.812567] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 41.817734] ? check_noncircular+0x20/0x20 [ 41.821989] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 41.827154] ? __lock_acquire+0x6ef/0x3dc0 [ 41.831365] ? check_noncircular+0x20/0x20 [ 41.835567] ? check_noncircular+0x20/0x20 [ 41.839772] ? find_held_lock+0x35/0x1d0 [ 41.843820] ? __lock_acquire+0x6ef/0x3dc0 [ 41.848022] ? check_noncircular+0x20/0x20 [ 41.852221] ? find_held_lock+0x35/0x1d0 [ 41.856262] ? find_held_lock+0x35/0x1d0 [ 41.860308] ? ipv4_sk_update_pmtu+0xa90/0xa90 [ 41.864858] rtnetlink_rcv_msg+0x51c/0x1090 [ 41.869151] ? rtnl_calcit.isra.23+0x4f0/0x4f0 [ 41.873699] ? trace_hardirqs_on+0xd/0x10 [ 41.877815] ? check_noncircular+0x20/0x20 [ 41.882018] ? find_held_lock+0x35/0x1d0 [ 41.886065] ? netlink_lookup+0x5f7/0xa90 [ 41.890186] ? find_held_lock+0x35/0x1d0 [ 41.894223] ? ipv4_sk_update_pmtu+0xa90/0xa90 [ 41.898781] ? lock_downgrade+0x990/0x990 [ 41.902914] ? lock_release+0xa40/0xa40 [ 41.906856] ? netlink_lookup+0x620/0xa90 [ 41.910980] ? ipv4_sk_update_pmtu+0xa90/0xa90 [ 41.915532] ? netlink_connect+0x4e0/0x4e0 [ 41.919737] ? netlink_deliver_tap+0x176/0xa60 [ 41.924286] ? iov_iter_advance+0x2a1/0x13f0 [ 41.928661] ? sock_has_perm+0x29c/0x400 [ 41.932697] netlink_rcv_skb+0x216/0x440 [ 41.936725] ? rtnl_calcit.isra.23+0x4f0/0x4f0 [ 41.941277] ? netlink_ack+0xab0/0xab0 [ 41.945135] ? netlink_skb_destructor+0x1d0/0x1d0 [ 41.949948] ? selinux_nlmsg_lookup+0x32b/0x430 [ 41.954590] rtnetlink_rcv+0x1c/0x20 [ 41.958272] netlink_unicast+0x4e8/0x6f0 [ 41.962306] ? netlink_attachskb+0x8a0/0x8a0 [ 41.966687] ? security_netlink_send+0x81/0xb0 [ 41.971253] netlink_sendmsg+0xa4a/0xe60 [ 41.975288] ? netlink_unicast+0x6f0/0x6f0 [ 41.979495] ? security_socket_sendmsg+0x89/0xb0 [ 41.984225] ? netlink_unicast+0x6f0/0x6f0 [ 41.988435] sock_sendmsg+0xca/0x110 [ 41.992123] sock_write_iter+0x31a/0x5d0 [ 41.996162] ? sock_sendmsg+0x110/0x110 [ 42.000121] ? selinux_capset+0x100/0x100 [ 42.004252] ? ___might_sleep+0x42c/0x470 [ 42.008376] do_iter_readv_writev+0x525/0x7f0 [ 42.012855] ? vfs_dedupe_file_range+0x900/0x900 [ 42.017586] ? rw_verify_area+0xe5/0x2b0 [ 42.021629] do_iter_write+0x154/0x540 [ 42.025493] ? dup_iter+0x260/0x260 [ 42.029089] ? __pmd_alloc+0x4e0/0x4e0 [ 42.032958] ? __lock_is_held+0xb6/0x140 [ 42.036994] vfs_writev+0x18a/0x340 [ 42.040595] ? __fget_light+0x297/0x380 [ 42.044544] ? vfs_iter_write+0xb0/0xb0 [ 42.048487] ? handle_mm_fault+0x23e/0x940 [ 42.052700] ? __fdget_pos+0x130/0x190 [ 42.056557] ? __fdget_raw+0x20/0x20 [ 42.060239] ? handle_mm_fault+0x4e3/0x940 [ 42.064443] ? down_read_trylock+0xdb/0x170 [ 42.068735] do_writev+0xfc/0x2a0 [ 42.072162] ? do_writev+0xfc/0x2a0 [ 42.075766] ? vfs_writev+0x340/0x340 [ 42.079544] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 42.084360] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.089355] SyS_writev+0x27/0x30 [ 42.092794] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 42.097518] RIP: 0033:0x43fd19 [ 42.100674] RSP: 002b:00007fff044065d8 EFLAGS: 00000203 ORIG_RAX: 0000000000000014 [ 42.108355] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd19 [ 42.115594] RDX: 0000000000000001 RSI: 0000000020b9fff0 RDI: 0000000000000003 [ 42.122834] RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000 [ 42.130082] R10: 0000000000000000 R11: 0000000000000203 R12: 0000000000401680 [ 42.137327] R13: 0000000000401710 R14: 0000000000000000 R15: 0000000000000000 [ 42.144578] 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 [ 42.163652] RIP: fib_dump_info+0x3aa/0x1470 RSP: ffff8801d145ec08 [ 42.169919] ---[ end trace 69de7207f3866aca ]--- [ 42.174681] Kernel panic - not syncing: Fatal exception [ 42.180301] Dumping ftrace buffer: [ 42.183814] (ftrace buffer empty) [ 42.187497] Kernel Offset: disabled [ 42.191098] Rebooting in 86400 seconds..