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kernel BUG at include/asm/spinlock.h:75!
invalid operand: 0000 [#1]
SMP
CPU:    0
EIP:    0060:[<c0183c9a>]    Not tainted
EFLAGS: 00010202   (2.6.5-vs1.9.0pre12.2)
EIP is at umount_unused+0x14a/0x1a0
eax: 00000001   ebx: f7fe48a0   ecx: f7fe5da0   edx: f7fe5da0
esi: f75fdf68   edi: f75fdf58   ebp: f7fe4220   esp: f75fdf50
ds: 007b   es: 007b   ss: 0068
Process vnamespace (pid: 349, threadinfo=f75fc000 task=f77a7860)
Stack: f7fe48a0 f75fdf68 f7fe4894 f7fe4254 f7ffd708 f763e7e0 c2688140 f7fe41e0
       c015447d c269adc0 f763e7e0 f763e860 40018000 4001b000 c269adf4 f763e860
       c0105bd5 f75fdfa0 f75fc000 40020800 bffffdc4 f75fc000 c0138a04 f7fe4220
Call Trace:
 [<c015447d>] do_munmap+0x15d/0x1d0
 [<c0105bd5>] sys_set_thread_area+0x1a5/0x1f0
 [<c0138a04>] vc_cleanup_namespace+0x64/0xe0
 [<c01074df>] syscall_call+0x7/0xb
                                                                                                  
Code: 0f 0b 4b 00 a7 c8 31 c0 eb 82 0f 0b 4a 00 a7 c8 31 c0 e9 6a
 /usr/sbin/vserver: line 75:   349 Segmentation fault      $_VNAMESPACE --cleanup