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-6,10.128.0.61' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 executing program syzkaller login: [ 32.935401] netlink: 13 bytes leftover after parsing attributes in process `syzkaller978188'. [ 32.944184] ------------[ cut here ]------------ [ 32.949031] WARNING: CPU: 1 PID: 3029 at mm/slab_common.c:962 kmalloc_slab+0x5d/0x70 [ 32.956929] Kernel panic - not syncing: panic_on_warn set ... [ 32.956929] [ 32.964274] CPU: 1 PID: 3029 Comm: syzkaller978188 Not tainted 4.13.0-rc5-next-20170817+ #5 [ 32.972729] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.982049] Call Trace: [ 32.984606] dump_stack+0x194/0x257 [ 32.988207] ? arch_local_irq_restore+0x53/0x53 [ 32.992856] panic+0x1e4/0x417 [ 32.996015] ? __warn+0x1d9/0x1d9 [ 32.999435] ? show_regs_print_info+0x65/0x65 [ 33.003911] ? kmalloc_slab+0x5d/0x70 [ 33.007679] __warn+0x1c4/0x1d9 [ 33.010924] ? kmalloc_slab+0x5d/0x70 [ 33.014693] report_bug+0x211/0x2d0 [ 33.018290] fixup_bug+0x40/0x90 [ 33.021630] do_trap+0x260/0x390 [ 33.024970] do_error_trap+0x120/0x390 [ 33.028826] ? rtnetlink_rcv+0x1c/0x20 [ 33.032683] ? netlink_unicast+0x4e8/0x6f0 [ 33.036883] ? netlink_sendmsg+0xa4a/0xe60 [ 33.041087] ? do_trap+0x390/0x390 [ 33.044597] ? kmalloc_slab+0x5d/0x70 [ 33.048372] ? __lock_is_held+0xb6/0x140 [ 33.052405] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.057219] do_invalid_op+0x1b/0x20 [ 33.060911] invalid_op+0x18/0x20 [ 33.064331] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 33.068704] RSP: 0018:ffff8801cf0cea98 EFLAGS: 00010246 [ 33.074034] RAX: 0000000000000000 RBX: ffff8801cf1441c0 RCX: 0000000000000000 [ 33.081279] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000700040 [ 33.088528] RBP: ffff8801cf0cea98 R08: 0000000000000001 R09: 0000000000000000 [ 33.095766] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 33.103003] R13: 0000000000000001 R14: 00000000014080c0 R15: dffffc0000000000 [ 33.110271] __kmalloc+0x25/0x760 [ 33.113692] ? dev_map_notification+0x9a/0x5e0 [ 33.118246] ? tun_device_event+0x403/0xcb0 [ 33.122543] tun_device_event+0x403/0xcb0 [ 33.126661] ? sel_netif_destroy+0x250/0x250 [ 33.131056] notifier_call_chain+0x136/0x2c0 [ 33.135436] ? raw_notifier_chain_unregister+0x1b0/0x1b0 [ 33.140854] ? dev_set_rx_mode+0x2f/0x40 [ 33.144882] ? __dev_change_flags+0x643/0x990 [ 33.149350] ? lock_downgrade+0x990/0x990 [ 33.153465] ? __dev_notify_flags+0x155/0x2e0 [ 33.157928] ? rtnl_is_locked+0x54/0xb0 [ 33.161870] ? rtnl_kfree_skbs+0x70/0x70 [ 33.165904] raw_notifier_call_chain+0x2d/0x40 [ 33.170456] call_netdevice_notifiers_info+0x51/0x90 [ 33.175532] call_netdevice_notifiers+0x6a/0x90 [ 33.180169] ? call_netdevice_notifiers_info+0x90/0x90 [ 33.185419] ? dev_change_flags+0xfa/0x140 [ 33.189627] do_setlink+0xbe5/0x38d0 [ 33.193311] ? console_unlock+0x69c/0xd80 [ 33.197433] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 33.202421] ? rtnl_register+0x70/0x70 [ 33.206281] ? __down_trylock_console_sem+0x20/0x1e0 [ 33.211352] ? wake_up_klogd+0x100/0x100 [ 33.215379] ? vprintk_emit+0x49b/0x590 [ 33.219351] ? __down_trylock_console_sem+0x18b/0x1e0 [ 33.224506] ? __down_trylock_console_sem+0x10d/0x1e0 [ 33.229665] ? vprintk_emit+0x3ea/0x590 [ 33.233614] ? vprintk_default+0x28/0x30 [ 33.237650] ? vprintk_func+0x5e/0xc0 [ 33.241420] ? printk+0xaa/0xca [ 33.244667] ? show_regs_print_info+0x65/0x65 [ 33.249142] ? idr_get_free+0xff0/0xff0 [ 33.253096] ? mutex_lock_io_nested+0x1740/0x1740 [ 33.257919] ? nla_parse+0x29a/0x3d0 [ 33.261603] ? nla_validate+0x1c0/0x1c0 [ 33.265548] ? validate_linkmsg+0x31b/0x4e0 [ 33.269839] rtnl_setlink+0x270/0x3c0 [ 33.273611] ? do_setlink+0x38d0/0x38d0 [ 33.277556] ? cred_has_capability+0x1a0/0x3d0 [ 33.282148] ? do_setlink+0x38d0/0x38d0 [ 33.286094] rtnetlink_rcv_msg+0x733/0x1090 [ 33.290397] ? rtnl_calcit.isra.23+0x4f0/0x4f0 [ 33.294951] ? trace_hardirqs_on+0xd/0x10 [ 33.299067] ? check_noncircular+0x20/0x20 [ 33.303282] ? find_held_lock+0x35/0x1d0 [ 33.307323] ? netlink_lookup+0x5f7/0xa90 [ 33.311452] ? find_held_lock+0x35/0x1d0 [ 33.315490] ? do_setlink+0x38d0/0x38d0 [ 33.319432] ? lock_downgrade+0x990/0x990 [ 33.323549] ? lock_release+0xa40/0xa40 [ 33.327492] ? netlink_lookup+0x620/0xa90 [ 33.331616] ? do_setlink+0x38d0/0x38d0 [ 33.335556] ? netlink_connect+0x4e0/0x4e0 [ 33.339772] ? netlink_deliver_tap+0x176/0xa60 [ 33.344330] ? iov_iter_advance+0x2a1/0x13f0 [ 33.348711] ? sock_has_perm+0x29c/0x400 [ 33.352750] netlink_rcv_skb+0x216/0x440 [ 33.356780] ? rtnl_calcit.isra.23+0x4f0/0x4f0 [ 33.361334] ? netlink_ack+0xab0/0xab0 [ 33.365191] ? netlink_skb_destructor+0x1d0/0x1d0 [ 33.370003] ? selinux_nlmsg_lookup+0x32b/0x430 [ 33.374645] rtnetlink_rcv+0x1c/0x20 [ 33.378332] netlink_unicast+0x4e8/0x6f0 [ 33.382371] ? netlink_attachskb+0x8a0/0x8a0 [ 33.386759] ? security_netlink_send+0x81/0xb0 [ 33.391323] netlink_sendmsg+0xa4a/0xe60 [ 33.395370] ? netlink_unicast+0x6f0/0x6f0 [ 33.399579] ? security_socket_sendmsg+0x89/0xb0 [ 33.404318] ? netlink_unicast+0x6f0/0x6f0 [ 33.408528] sock_sendmsg+0xca/0x110 [ 33.412215] sock_write_iter+0x31a/0x5d0 [ 33.416250] ? sock_sendmsg+0x110/0x110 [ 33.420209] ? selinux_capset+0x100/0x100 [ 33.424325] ? __might_sleep+0x4c/0x190 [ 33.428281] do_iter_readv_writev+0x525/0x7f0 [ 33.432752] ? vfs_dedupe_file_range+0x900/0x900 [ 33.437483] ? rw_verify_area+0xe5/0x2b0 [ 33.441518] do_iter_write+0x154/0x540 [ 33.445378] ? dup_iter+0x260/0x260 [ 33.448980] ? __pmd_alloc+0x4e0/0x4e0 [ 33.452840] ? __lock_is_held+0xb6/0x140 [ 33.456874] vfs_writev+0x18a/0x340 [ 33.460469] ? __fget_light+0x297/0x380 [ 33.464413] ? vfs_iter_write+0xb0/0xb0 [ 33.468353] ? handle_mm_fault+0x23e/0x940 [ 33.472571] ? __fdget_pos+0x130/0x190 [ 33.476428] ? __fdget_raw+0x20/0x20 [ 33.480118] ? handle_mm_fault+0x4e3/0x940 [ 33.484320] ? down_read_trylock+0xdb/0x170 [ 33.488615] do_writev+0xfc/0x2a0 [ 33.492034] ? do_writev+0xfc/0x2a0 [ 33.495633] ? vfs_writev+0x340/0x340 [ 33.499404] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 33.504219] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 33.509211] SyS_writev+0x27/0x30 [ 33.512633] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 33.517358] RIP: 0033:0x445139 [ 33.520517] RSP: 002b:00000000007efe68 EFLAGS: 00000207 ORIG_RAX: 0000000000000014 [ 33.528202] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000445139 [ 33.535439] RDX: 0000000000000001 RSI: 0000000020001ff0 RDI: 0000000000000004 [ 33.542681] RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000 [ 33.549919] R10: 0000000000000000 R11: 0000000000000207 R12: 00000000004027f0 [ 33.557156] R13: 0000000000402880 R14: 0000000000000000 R15: 0000000000000000 [ 33.564614] Dumping ftrace buffer: [ 33.568180] (ftrace buffer empty) [ 33.571863] Kernel Offset: disabled [ 33.575459] Rebooting in 86400 seconds..