INIT: Entering runlevel: 2 [[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.15' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 24.270249] ------------[ cut here ]------------ [ 24.275146] add_uevent_var: buffer size too small [ 24.280326] WARNING: CPU: 1 PID: 4470 at lib/kobject_uevent.c:594 add_uevent_var+0x2aa/0x2d0 [ 24.288899] Kernel panic - not syncing: panic_on_warn set ... [ 24.288899] [ 24.296238] CPU: 1 PID: 4470 Comm: syzkaller765082 Not tainted 4.16.0+ #10 [ 24.303224] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.312566] Call Trace: [ 24.315131] dump_stack+0x194/0x24d [ 24.318736] ? arch_local_irq_restore+0x53/0x53 [ 24.323380] ? vsnprintf+0x1ed/0x1900 [ 24.327154] panic+0x1e4/0x41c [ 24.330319] ? refcount_error_report+0x214/0x214 [ 24.335053] ? show_regs_print_info+0x18/0x18 [ 24.339525] ? __warn+0x1c1/0x200 [ 24.342950] ? add_uevent_var+0x2aa/0x2d0 [ 24.347074] __warn+0x1dc/0x200 [ 24.350327] ? add_uevent_var+0x2aa/0x2d0 [ 24.354450] report_bug+0x1f4/0x2b0 [ 24.358056] fixup_bug.part.10+0x37/0x80 [ 24.362091] do_error_trap+0x2d7/0x3e0 [ 24.365951] ? vprintk_default+0x28/0x30 [ 24.369984] ? math_error+0x400/0x400 [ 24.373761] ? printk+0xaa/0xca [ 24.377016] ? show_regs_print_info+0x18/0x18 [ 24.381499] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.386315] do_invalid_op+0x1b/0x20 [ 24.390002] invalid_op+0x1b/0x40 [ 24.393433] RIP: 0010:add_uevent_var+0x2aa/0x2d0 [ 24.398156] RSP: 0018:ffff8801ad91e810 EFLAGS: 00010286 [ 24.403490] RAX: dffffc0000000008 RBX: ffff8801d95d6340 RCX: ffffffff815b193e [ 24.410741] RDX: 0000000000000000 RSI: 1ffff10035b23cb2 RDI: 1ffff10035b23c87 [ 24.417992] RBP: ffff8801ad91e8d8 R08: 1ffff10035b23c49 R09: 0000000000000000 [ 24.425249] R10: 0000000000000002 R11: 0000000000000000 R12: 1ffff10035b23d03 [ 24.432490] R13: ffff8801d95d6458 R14: 00000000000003e6 R15: 0000000000000438 [ 24.439739] ? vprintk_func+0x5e/0xc0 [ 24.443526] ? kobj_bcast_filter+0x1c0/0x1c0 [ 24.447908] ? string+0x180/0x200 [ 24.451343] ? rfkill_dev_uevent+0x1a/0x170 [ 24.455639] rfkill_dev_uevent+0x31/0x170 [ 24.459763] dev_uevent+0x2b6/0x7e0 [ 24.463366] ? rfkill_resume_polling+0x160/0x160 [ 24.468097] ? device_get_devnode+0x2e0/0x2e0 [ 24.472570] ? add_uevent_var+0x202/0x2d0 [ 24.476704] ? kobj_bcast_filter+0x1c0/0x1c0 [ 24.481085] ? kobject_uevent_env+0x1ed/0xd30 [ 24.485556] ? kobject_get_path+0xb9/0x190 [ 24.489764] ? kobject_uevent_env+0x2d0/0xd30 [ 24.494237] ? device_get_devnode+0x2e0/0x2e0 [ 24.498706] kobject_uevent_env+0x3fe/0xd30 [ 24.502998] ? mutex_unlock+0xd/0x10 [ 24.506688] ? device_pm_add+0x23e/0x310 [ 24.510735] kobject_uevent+0x1f/0x30 [ 24.514510] device_add+0xd04/0x1650 [ 24.518201] ? device_private_init+0x230/0x230 [ 24.522757] ? rfkill_register+0xe8/0xd60 [ 24.526877] rfkill_register+0x254/0xd60 [ 24.530916] ? rfkill_fop_write+0x610/0x610 [ 24.535216] ? kfree_skb+0x16a/0x4c0 [ 24.538908] ? nl80211_notify_wiphy+0x234/0x2a0 [ 24.543548] ? __kfree_skb+0x20/0x20 [ 24.547236] ? mntput_no_expire+0x15e/0xa90 [ 24.551533] ? lookup_one_len+0x33e/0x4c0 [ 24.555662] ? do_raw_spin_trylock+0x190/0x190 [ 24.561527] ? nl80211_set_coalesce+0x2620/0x2620 [ 24.566350] wiphy_register+0x19d1/0x2050 [ 24.570476] ? wiphy_unregister+0x1120/0x1120 [ 24.574946] ? rcu_read_lock_sched_held+0x108/0x120 [ 24.579935] ? __kmalloc+0x46e/0x760 [ 24.583623] ? find_held_lock+0x35/0x1d0 [ 24.587658] ? ieee80211_cs_list_valid+0x2f3/0x3c0 [ 24.592563] ieee80211_register_hw+0x1162/0x3100 [ 24.597291] ? ieee80211_register_hw+0x1162/0x3100 [ 24.602195] ? ieee80211_ifa6_changed+0x9c0/0x9c0 [ 24.607020] mac80211_hwsim_new_radio+0x1d06/0x2fb0 [ 24.612025] ? widen_string+0xa1/0x1e0 [ 24.615899] ? __rhashtable_insert_fast.constprop.52+0xc10/0xc10 [ 24.622032] ? pointer+0x9c0/0x9c0 [ 24.625560] ? rcu_note_context_switch+0x710/0x710 [ 24.630464] ? kasprintf+0xb3/0xe0 [ 24.633992] ? kvasprintf+0xd5/0x130 [ 24.637687] ? genl_rcv_msg+0x115/0x140 [ 24.641634] ? kasprintf+0xb3/0xe0 [ 24.645146] ? kvasprintf_const+0x160/0x160 [ 24.649454] ? trace_hardirqs_off+0x10/0x10 [ 24.653762] hwsim_new_radio_nl+0x67a/0x8c0 [ 24.658056] ? mac80211_hwsim_new_radio+0x2fb0/0x2fb0 [ 24.663221] ? __netlink_ns_capable+0xe1/0x120 [ 24.667781] genl_family_rcv_msg+0x7b7/0xfb0 [ 24.672164] ? genl_rcv+0x40/0x40 [ 24.675590] ? lock_downgrade+0x980/0x980 [ 24.679714] ? __lock_is_held+0xb6/0x140 [ 24.683769] genl_rcv_msg+0xb2/0x140 [ 24.687455] netlink_rcv_skb+0x14b/0x380 [ 24.691490] ? genl_family_rcv_msg+0xfb0/0xfb0 [ 24.696047] ? netlink_ack+0xa10/0xa10 [ 24.699915] ? genl_rcv+0x19/0x40 [ 24.703351] ? netlink_skb_destructor+0x1d0/0x1d0 [ 24.708166] ? copyin+0x91/0xb0 [ 24.711418] genl_rcv+0x28/0x40 [ 24.714681] netlink_unicast+0x4c4/0x6b0 [ 24.718716] ? netlink_attachskb+0x8a0/0x8a0 [ 24.723098] ? security_netlink_send+0x81/0xb0 [ 24.727653] netlink_sendmsg+0xa4a/0xe60 [ 24.731687] ? netlink_unicast+0x6b0/0x6b0 [ 24.735897] ? security_socket_sendmsg+0x89/0xb0 [ 24.740624] ? netlink_unicast+0x6b0/0x6b0 [ 24.744840] sock_sendmsg+0xca/0x110 [ 24.748549] ___sys_sendmsg+0x767/0x8b0 [ 24.752498] ? SyS_membarrier+0x700/0x700 [ 24.756620] ? copy_msghdr_from_user+0x590/0x590 [ 24.761363] ? __pmd_alloc+0x4e0/0x4e0 [ 24.765225] ? trace_hardirqs_off+0x10/0x10 [ 24.769522] ? find_held_lock+0x35/0x1d0 [ 24.773572] ? __fget_light+0x2b2/0x3c0 [ 24.777521] ? fget_raw+0x20/0x20 [ 24.780964] ? __do_page_fault+0x58e/0xbe0 [ 24.785173] ? lock_downgrade+0x980/0x980 [ 24.789297] __sys_sendmsg+0xe5/0x210 [ 24.793075] ? __sys_sendmsg+0xe5/0x210 [ 24.797032] ? SyS_shutdown+0x290/0x290 [ 24.800990] ? __do_page_fault+0x358/0xbe0 [ 24.805202] ? move_addr_to_kernel+0x60/0x60 [ 24.809583] SyS_sendmsg+0x2d/0x50 [ 24.813095] ? __sys_sendmsg+0x210/0x210 [ 24.817132] do_syscall_64+0x281/0x940 [ 24.820991] ? vmalloc_sync_all+0x30/0x30 [ 24.825116] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.829844] ? syscall_return_slowpath+0x550/0x550 [ 24.834744] ? syscall_return_slowpath+0x2ac/0x550 [ 24.839645] ? prepare_exit_to_usermode+0x350/0x350 [ 24.844638] ? retint_user+0x18/0x18 [ 24.848326] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.853144] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 24.858307] RIP: 0033:0x43fda9 [ 24.861470] RSP: 002b:00007fffa3f95a48 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 24.869152] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fda9 [ 24.876393] RDX: 0000000000000000 RSI: 0000000020b3dfc8 RDI: 0000000000000003 [ 24.883633] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 24.890875] R10: 00000000004002c8 R11: 0000000000000213 R12: 00000000004016d0 [ 24.898119] R13: 0000000000401760 R14: 0000000000000000 R15: 0000000000000000 [ 24.906043] Dumping ftrace buffer: [ 24.909668] (ftrace buffer empty) [ 24.913365] Kernel Offset: disabled [ 24.916986] Rebooting in 86400 seconds..