Jul  7 00:15:59 vm 6892.028174] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: ffffffffa0133a49
Jul  7 00:15:59 vm 6892.028176] 
Jul  7 00:15:59 vm 6892.035007] Pid: 1266, comm: php5-cgi Not tainted 2.6.32-5-amd64 #1
Jul  7 00:15:59 vm 6892.040129] Call Trace:
Jul  7 00:15:59 vm 6892.041385]  [<ffffffff812f8953>] ? panic+0x86/0x141
Jul  7 00:15:59 vm 6892.044616]  [<ffffffffa0133a49>] ? VBoxGuestCommonIOCtl+0x1865/0x1877 [vboxguest]
Jul  7 00:15:59 vm 6892.047505]  [<ffffffffa0137661>] ? rtR0MemFree+0x17/0x63 [vboxguest]
Jul  7 00:15:59 vm 6892.049891]  [<ffffffffa0131a59>] ? VBoxGuestCommonIOCtl_HGCMCall+0x1e6/0x26a [vboxguest]
Jul  7 00:15:59 vm 6892.053246]  [<ffffffff810114ce>] ? common_interrupt+0xe/0x13
Jul  7 00:15:59 vm 6892.055502]  [<ffffffff8104dd7d>] ? __stack_chk_fail+0x17/0x1b
Jul  7 00:15:59 vm 6892.058106]  [<ffffffffa0133a49>] ? VBoxGuestCommonIOCtl+0x1865/0x1877 [vboxguest]
Jul  7 00:15:59 vm 6892.061617]  [<ffffffff8106c1f1>] ? ktime_get_real+0xc/0x41
Jul  7 00:15:59 vm 6892.063630]  [<ffffffffa01d9cbd>] ? vboxCallCreate+0x73/0x7f [vboxsf]
Jul  7 00:15:59 vm 6892.066107]  [<ffffffff810e4b9b>] ? __slab_free+0x7f/0x27a
Jul  7 00:15:59 vm 6892.076395]  [<ffffffffa01d8630>] ? sf_stat+0x30/0x5e [vboxsf]
Jul  7 00:15:59 vm 6892.103241]  [<ffffffff810e4b9b>] ? __slab_free+0x7f/0x27a
Jul  7 00:15:59 vm 6892.105204]  [<ffffffffa01d8630>] ? sf_stat+0x30/0x5e [vboxsf]
Jul  7 00:15:59 vm 6892.107186]  [<ffffffffa01d86e3>] ? sf_inode_revalidate+0x85/0xbc [vboxsf]
Jul  7 00:15:59 vm 6892.109637]  [<ffffffff810f5411>] ? path_to_nameidata+0x15/0x37
Jul  7 00:15:59 vm 6892.112983]  [<ffffffff810f6293>] ? __link_path_walk+0x6f0/0x6f5
Jul  7 00:15:59 vm 6892.115821]  [<ffffffff8118d2e7>] ? _atomic_dec_and_lock+0x33/0x50
Jul  7 00:15:59 vm 6892.118008]  [<ffffffffa01d8723>] ? sf_dentry_revalidate+0x9/0x14 [vboxsf]
Jul  7 00:15:59 vm 6892.121608]  [<ffffffff810f5615>] ? do_revalidate+0x12/0x45
Jul  7 00:15:59 vm 6892.124392]  [<ffffffff810f577b>] ? do_lookup+0x133/0x15d
Jul  7 00:15:59 vm 6892.128183]  [<ffffffff810f6148>] ? __link_path_walk+0x5a5/0x6f5
Jul  7 00:15:59 vm 6892.130507]  [<ffffffff810f64c6>] ? path_walk+0x66/0xc9
Jul  7 00:15:59 vm 6892.132500]  [<ffffffff810f7930>] ? do_path_lookup+0x20/0x77
Jul  7 00:15:59 vm 6892.136773]  [<ffffffff810f7abc>] ? do_filp_open+0xe5/0x94b
Jul  7 00:15:59 vm 6892.138712]  [<ffffffff81100ec1>] ? alloc_fd+0x67/0x10c
Jul  7 00:15:59 vm 6892.140653]  [<ffffffff810ec4fb>] ? do_sys_open+0x55/0xfc
Jul  7 00:15:59 vm 6892.144009]  [<ffffffff81010b42>] ? system_call_fastpath+0x16/0x1b
Jul  7 00:15:59 vm 6892.149912] Rebooting in 1 seconds..