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-9,10.128.0.41' (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: [ 33.062669] netlink: 13 bytes leftover after parsing attributes in process `syzkaller431298'. [ 33.064080] ------------[ cut here ]------------ [ 33.064722] WARNING: CPU: 1 PID: 3005 at mm/slab_common.c:962 kmalloc_slab+0x5d/0x70 [ 33.065939] Kernel panic - not syncing: panic_on_warn set ... [ 33.065939] [ 33.066922] CPU: 1 PID: 3005 Comm: syzkaller431298 Not tainted 4.13.0-rc5+ #13 [ 33.067919] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.069184] Call Trace: [ 33.069544] dump_stack+0x194/0x257 [ 33.070053] ? arch_local_irq_restore+0x53/0x53 [ 33.070686] panic+0x1e4/0x417 [ 33.071120] ? __warn+0x1d9/0x1d9 [ 33.071586] ? show_regs_print_info+0x65/0x65 [ 33.072239] ? kmalloc_slab+0x5d/0x70 [ 33.072783] __warn+0x1c4/0x1d9 [ 33.073227] ? kmalloc_slab+0x5d/0x70 [ 33.073752] report_bug+0x211/0x2d0 [ 33.074248] fixup_bug+0x40/0x90 [ 33.074705] do_trap+0x260/0x390 [ 33.075167] do_error_trap+0x120/0x390 [ 33.075725] ? rtnetlink_rcv+0x1c/0x20 [ 33.076246] ? netlink_unicast+0x4e8/0x6f0 [ 33.076812] ? netlink_sendmsg+0xa4a/0xe60 [ 33.077381] ? do_trap+0x390/0x390 [ 33.077873] ? kmalloc_slab+0x5d/0x70 [ 33.078387] ? __lock_is_held+0xb6/0x140 [ 33.079007] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.079693] do_invalid_op+0x1b/0x20 [ 33.080195] invalid_op+0x1e/0x30 [ 33.080660] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 33.081248] RSP: 0018:ffff8801d0116a98 EFLAGS: 00010246 [ 33.082032] RAX: 0000000000000000 RBX: ffff8801d9a8c280 RCX: 0000000000000000 [ 33.084158] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000700040 [ 33.091396] RBP: ffff8801d0116a98 R08: 0000000000000001 R09: 0000000000000000 [ 33.098634] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 33.105874] R13: 0000000000000001 R14: 00000000014080c0 R15: dffffc0000000000 [ 33.113138] __kmalloc+0x25/0x760 [ 33.116570] ? tun_device_event+0x403/0xcb0 [ 33.120874] tun_device_event+0x403/0xcb0 [ 33.124995] ? sel_netif_destroy+0x250/0x250 [ 33.129391] notifier_call_chain+0x136/0x2c0 [ 33.133790] ? raw_notifier_chain_unregister+0x1b0/0x1b0 [ 33.139212] ? dev_set_rx_mode+0x2f/0x40 [ 33.143246] ? __dev_change_flags+0x643/0x990 [ 33.147712] ? lock_downgrade+0x990/0x990 [ 33.151829] ? __dev_notify_flags+0x155/0x2e0 [ 33.156295] ? rtnl_is_locked+0x54/0xb0 [ 33.160236] ? rtnl_kfree_skbs+0x70/0x70 [ 33.164272] raw_notifier_call_chain+0x2d/0x40 [ 33.168829] call_netdevice_notifiers_info+0x51/0x90 [ 33.173902] call_netdevice_notifiers+0x6a/0x90 [ 33.178550] ? call_netdevice_notifiers_info+0x90/0x90 [ 33.183800] ? dev_change_flags+0xfa/0x140 [ 33.188010] do_setlink+0xbe5/0x38d0 [ 33.191695] ? console_unlock+0x69c/0xd80 [ 33.195817] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 33.200806] ? rtnl_register+0x70/0x70 [ 33.204665] ? devkmsg_poll+0x1e0/0x1e0 [ 33.208613] ? wake_up_klogd+0x100/0x100 [ 33.212639] ? vprintk_emit+0x49b/0x590 [ 33.216582] ? __down_trylock_console_sem+0x18b/0x1e0 [ 33.221740] ? __down_trylock_console_sem+0x10d/0x1e0 [ 33.226903] ? vprintk_emit+0x3ea/0x590 [ 33.230854] ? vprintk_default+0x28/0x30 [ 33.234884] ? vprintk_func+0x5e/0xc0 [ 33.238663] ? printk+0xaa/0xca [ 33.241916] ? show_regs_print_info+0x65/0x65 [ 33.246384] ? idr_get_free+0xff0/0xff0 [ 33.250324] ? mutex_lock_io_nested+0x1740/0x1740 [ 33.255144] ? nla_parse+0x29a/0x3d0 [ 33.258827] ? nla_validate+0x1c0/0x1c0 [ 33.262771] ? __lock_acquire+0x6ef/0x3dc0 [ 33.266973] ? validate_linkmsg+0x31b/0x4e0 [ 33.271266] rtnl_setlink+0x270/0x3c0 [ 33.275037] ? do_setlink+0x38d0/0x38d0 [ 33.278980] ? cred_has_capability+0x1a0/0x3d0 [ 33.283570] ? do_setlink+0x38d0/0x38d0 [ 33.287513] rtnetlink_rcv_msg+0x733/0x1090 [ 33.291807] ? rtnl_calcit.isra.23+0x4f0/0x4f0 [ 33.296355] ? trace_hardirqs_on+0xd/0x10 [ 33.300472] ? check_noncircular+0x20/0x20 [ 33.304683] ? find_held_lock+0x35/0x1d0 [ 33.308720] ? netlink_lookup+0x5f7/0xa90 [ 33.312840] ? find_held_lock+0x35/0x1d0 [ 33.316877] ? do_setlink+0x38d0/0x38d0 [ 33.320820] ? lock_downgrade+0x990/0x990 [ 33.324937] ? lock_release+0xa40/0xa40 [ 33.328880] ? netlink_lookup+0x620/0xa90 [ 33.333001] ? do_setlink+0x38d0/0x38d0 [ 33.336941] ? netlink_connect+0x4e0/0x4e0 [ 33.341149] ? netlink_deliver_tap+0x176/0xa60 [ 33.345702] ? iov_iter_advance+0x2a1/0x13f0 [ 33.350078] ? sock_has_perm+0x29c/0x400 [ 33.354110] netlink_rcv_skb+0x216/0x440 [ 33.358138] ? rtnl_calcit.isra.23+0x4f0/0x4f0 [ 33.362688] ? netlink_ack+0xab0/0xab0 [ 33.366545] ? netlink_skb_destructor+0x1d0/0x1d0 [ 33.371355] ? selinux_nlmsg_lookup+0x32b/0x430 [ 33.375994] rtnetlink_rcv+0x1c/0x20 [ 33.379678] netlink_unicast+0x4e8/0x6f0 [ 33.383711] ? netlink_attachskb+0x8a0/0x8a0 [ 33.388092] ? security_netlink_send+0x81/0xb0 [ 33.392645] netlink_sendmsg+0xa4a/0xe60 [ 33.396684] ? netlink_unicast+0x6f0/0x6f0 [ 33.400888] ? security_socket_sendmsg+0x89/0xb0 [ 33.405610] ? netlink_unicast+0x6f0/0x6f0 [ 33.409815] sock_sendmsg+0xca/0x110 [ 33.413500] sock_write_iter+0x31a/0x5d0 [ 33.417532] ? sock_sendmsg+0x110/0x110 [ 33.421489] ? selinux_capset+0x100/0x100 [ 33.425610] ? ___might_sleep+0x42c/0x470 [ 33.429731] do_iter_readv_writev+0x525/0x7f0 [ 33.434200] ? vfs_dedupe_file_range+0x900/0x900 [ 33.438931] ? rw_verify_area+0xe5/0x2b0 [ 33.442963] do_iter_write+0x154/0x540 [ 33.446820] ? dup_iter+0x260/0x260 [ 33.450417] ? __pmd_alloc+0x4e0/0x4e0 [ 33.454272] ? __lock_is_held+0xb6/0x140 [ 33.458306] vfs_writev+0x18a/0x340 [ 33.461900] ? __fget_light+0x297/0x380 [ 33.465849] ? vfs_iter_write+0xb0/0xb0 [ 33.469796] ? handle_mm_fault+0x23e/0x940 [ 33.474017] ? __fdget_pos+0x130/0x190 [ 33.477872] ? __fdget_raw+0x20/0x20 [ 33.481555] ? handle_mm_fault+0x4e3/0x940 [ 33.485764] ? down_read_trylock+0xdb/0x170 [ 33.490057] do_writev+0xfc/0x2a0 [ 33.493478] ? do_writev+0xfc/0x2a0 [ 33.497078] ? vfs_writev+0x340/0x340 [ 33.500848] ? entry_SYSCALL_64_fastpath+0x5/0xbe [ 33.505679] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 33.510672] SyS_writev+0x27/0x30 [ 33.514097] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 33.518826] RIP: 0033:0x445139 [ 33.521996] RSP: 002b:00000000007efe68 EFLAGS: 00000207 ORIG_RAX: 0000000000000014 [ 33.529678] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000445139 [ 33.536916] RDX: 0000000000000001 RSI: 0000000020001ff0 RDI: 0000000000000004 [ 33.544153] RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000 [ 33.551392] R10: 0000000000000000 R11: 0000000000000207 R12: 00000000004027f0 [ 33.558630] R13: 0000000000402880 R14: 0000000000000000 R15: 0000000000000000 [ 33.566034] Dumping ftrace buffer: [ 33.569594] (ftrace buffer empty) [ 33.573273] Kernel Offset: disabled [ 33.576887] Rebooting in 86400 seconds..