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 '10.128.0.29' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 23.013961] ------------[ cut here ]------------ [ 23.018868] add_uevent_var: buffer size too small [ 23.024023] WARNING: CPU: 0 PID: 4431 at lib/kobject_uevent.c:594 add_uevent_var+0x2aa/0x2d0 [ 23.032587] Kernel panic - not syncing: panic_on_warn set ... [ 23.032587] [ 23.039921] CPU: 0 PID: 4431 Comm: syzkaller678536 Not tainted 4.16.0-rc7+ #374 [ 23.047334] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.056661] Call Trace: [ 23.059223] dump_stack+0x194/0x24d [ 23.062824] ? arch_local_irq_restore+0x53/0x53 [ 23.067464] ? vsnprintf+0x1ed/0x1900 [ 23.071236] panic+0x1e4/0x41c [ 23.074399] ? refcount_error_report+0x214/0x214 [ 23.079126] ? show_regs_print_info+0x18/0x18 [ 23.083596] ? __warn+0x1c1/0x200 [ 23.087028] ? add_uevent_var+0x2aa/0x2d0 [ 23.091146] __warn+0x1dc/0x200 [ 23.094393] ? add_uevent_var+0x2aa/0x2d0 [ 23.098513] report_bug+0x1f4/0x2b0 [ 23.102111] fixup_bug.part.10+0x37/0x80 [ 23.106144] do_error_trap+0x2d7/0x3e0 [ 23.110001] ? vprintk_default+0x28/0x30 [ 23.114042] ? math_error+0x400/0x400 [ 23.117810] ? printk+0xaa/0xca [ 23.121062] ? show_regs_print_info+0x18/0x18 [ 23.125529] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 23.130350] do_invalid_op+0x1b/0x20 [ 23.134035] invalid_op+0x1b/0x40 [ 23.137461] RIP: 0010:add_uevent_var+0x2aa/0x2d0 [ 23.142208] RSP: 0018:ffff8801adba6810 EFLAGS: 00010286 [ 23.147545] RAX: dffffc0000000008 RBX: ffff8801ad7a6d40 RCX: ffffffff815b193e [ 23.154785] RDX: 0000000000000000 RSI: 1ffff10035b74cb2 RDI: 1ffff10035b74c87 [ 23.162031] RBP: ffff8801adba68d8 R08: 1ffff10035b74c49 R09: 0000000000000000 [ 23.169269] R10: 0000000000000002 R11: 0000000000000000 R12: 1ffff10035b74d03 [ 23.176509] R13: ffff8801ad7a6e58 R14: 00000000000003e6 R15: 0000000000000438 [ 23.183759] ? vprintk_func+0x5e/0xc0 [ 23.187538] ? kobj_bcast_filter+0x1c0/0x1c0 [ 23.191919] ? string+0x180/0x200 [ 23.195361] ? rfkill_dev_uevent+0x1a/0x170 [ 23.199658] rfkill_dev_uevent+0x31/0x170 [ 23.203781] dev_uevent+0x2b6/0x7e0 [ 23.207380] ? rfkill_resume_polling+0x160/0x160 [ 23.212106] ? device_get_devnode+0x2e0/0x2e0 [ 23.216574] ? add_uevent_var+0x202/0x2d0 [ 23.220700] ? kobj_bcast_filter+0x1c0/0x1c0 [ 23.225087] ? kobject_uevent_env+0x1ed/0xd30 [ 23.229557] ? kobject_get_path+0xb9/0x190 [ 23.233763] ? kobject_uevent_env+0x2d0/0xd30 [ 23.238234] ? device_get_devnode+0x2e0/0x2e0 [ 23.242699] kobject_uevent_env+0x3fe/0xd30 [ 23.246991] ? mutex_unlock+0xd/0x10 [ 23.250677] ? device_pm_add+0x23e/0x310 [ 23.254712] kobject_uevent+0x1f/0x30 [ 23.258482] device_add+0xd04/0x1650 [ 23.262173] ? device_private_init+0x230/0x230 [ 23.266728] ? rfkill_register+0xe8/0xd60 [ 23.270858] rfkill_register+0x254/0xd60 [ 23.274890] ? rfkill_fop_write+0x610/0x610 [ 23.279180] ? kfree_skb+0x16a/0x4c0 [ 23.282865] ? nl80211_notify_wiphy+0x234/0x2a0 [ 23.287502] ? __kfree_skb+0x20/0x20 [ 23.291188] ? mntput_no_expire+0x15e/0xa90 [ 23.295480] ? lookup_one_len+0x33e/0x4c0 [ 23.299598] ? do_raw_spin_trylock+0x190/0x190 [ 23.304155] ? nl80211_set_coalesce+0x2620/0x2620 [ 23.308974] wiphy_register+0x19d1/0x2050 [ 23.313096] ? wiphy_unregister+0x1120/0x1120 [ 23.317563] ? rcu_read_lock_sched_held+0x108/0x120 [ 23.322550] ? __kmalloc+0x46e/0x760 [ 23.326236] ? find_held_lock+0x35/0x1d0 [ 23.330271] ? ieee80211_cs_list_valid+0x2f3/0x3c0 [ 23.335172] ieee80211_register_hw+0x1162/0x3100 [ 23.339898] ? ieee80211_register_hw+0x1162/0x3100 [ 23.344800] ? ieee80211_ifa6_changed+0x9c0/0x9c0 [ 23.349617] mac80211_hwsim_new_radio+0x1d06/0x2fb0 [ 23.354602] ? widen_string+0xa1/0x1e0 [ 23.358464] ? __rhashtable_insert_fast.constprop.52+0xc10/0xc10 [ 23.364580] ? pointer+0x9c0/0x9c0 [ 23.368091] ? rcu_note_context_switch+0x710/0x710 [ 23.372993] ? kasprintf+0xb3/0xe0 [ 23.376511] ? kvasprintf+0xd5/0x130 [ 23.380198] ? genl_rcv_msg+0x115/0x140 [ 23.384146] ? kasprintf+0xb3/0xe0 [ 23.387658] ? kvasprintf_const+0x160/0x160 [ 23.391953] ? trace_hardirqs_off+0x10/0x10 [ 23.396249] hwsim_new_radio_nl+0x67a/0x8c0 [ 23.400543] ? mac80211_hwsim_new_radio+0x2fb0/0x2fb0 [ 23.405707] ? __netlink_ns_capable+0xe1/0x120 [ 23.410263] genl_family_rcv_msg+0x7b7/0xfb0 [ 23.414647] ? genl_rcv+0x40/0x40 [ 23.418074] ? lock_downgrade+0x980/0x980 [ 23.422196] ? __lock_is_held+0xb6/0x140 [ 23.426236] genl_rcv_msg+0xb2/0x140 [ 23.429931] netlink_rcv_skb+0x14b/0x380 [ 23.433964] ? genl_family_rcv_msg+0xfb0/0xfb0 [ 23.438519] ? netlink_ack+0xa10/0xa10 [ 23.442373] ? genl_rcv+0x19/0x40 [ 23.445799] ? netlink_skb_destructor+0x1d0/0x1d0 [ 23.450611] ? copyin+0x91/0xb0 [ 23.453862] genl_rcv+0x28/0x40 [ 23.457116] netlink_unicast+0x4c4/0x6b0 [ 23.461151] ? netlink_attachskb+0x8a0/0x8a0 [ 23.465532] ? security_netlink_send+0x81/0xb0 [ 23.470086] netlink_sendmsg+0xa4a/0xe60 [ 23.474119] ? netlink_unicast+0x6b0/0x6b0 [ 23.478328] ? security_socket_sendmsg+0x89/0xb0 [ 23.483057] ? netlink_unicast+0x6b0/0x6b0 [ 23.487266] sock_sendmsg+0xca/0x110 [ 23.490951] ___sys_sendmsg+0x767/0x8b0 [ 23.494899] ? SyS_membarrier+0x700/0x700 [ 23.499024] ? copy_msghdr_from_user+0x590/0x590 [ 23.503761] ? __pmd_alloc+0x4e0/0x4e0 [ 23.507623] ? trace_hardirqs_off+0x10/0x10 [ 23.511916] ? find_held_lock+0x35/0x1d0 [ 23.515950] ? __fget_light+0x2b2/0x3c0 [ 23.519897] ? fget_raw+0x20/0x20 [ 23.523332] ? __do_page_fault+0x58e/0xbe0 [ 23.527540] ? lock_downgrade+0x980/0x980 [ 23.531662] __sys_sendmsg+0xe5/0x210 [ 23.535437] ? __sys_sendmsg+0xe5/0x210 [ 23.539385] ? SyS_shutdown+0x290/0x290 [ 23.543331] ? __do_page_fault+0x358/0xbe0 [ 23.547538] ? move_addr_to_kernel+0x60/0x60 [ 23.551923] SyS_sendmsg+0x2d/0x50 [ 23.555434] ? __sys_sendmsg+0x210/0x210 [ 23.559468] do_syscall_64+0x281/0x940 [ 23.563330] ? vmalloc_sync_all+0x30/0x30 [ 23.567450] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.572176] ? syscall_return_slowpath+0x550/0x550 [ 23.577078] ? syscall_return_slowpath+0x2ac/0x550 [ 23.581981] ? prepare_exit_to_usermode+0x350/0x350 [ 23.586975] ? retint_user+0x18/0x18 [ 23.590665] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 23.595483] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 23.600645] RIP: 0033:0x43fda9 [ 23.603806] RSP: 002b:00007ffde548edb8 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 23.611486] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fda9 [ 23.618728] RDX: 0000000000000000 RSI: 0000000020b3dfc8 RDI: 0000000000000003 [ 23.625975] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 23.633216] R10: 00000000004002c8 R11: 0000000000000213 R12: 00000000004016d0 [ 23.640459] R13: 0000000000401760 R14: 0000000000000000 R15: 0000000000000000 [ 23.648280] Dumping ftrace buffer: [ 23.651886] (ftrace buffer empty) [ 23.655568] Kernel Offset: disabled [ 23.659169] Rebooting in 86400 seconds..