About "*(int *)0 = 0"

ckacka

Please tell me the usage about "*(int *)0 = 0" in kernel source.

BTW:
I compiled this snippet in my init_module routine, then "insmod" it. The output is listed below...

Unable to handle kernel NULL pointer dereference at virtual address 00000000
  printing eip:
...
...

Thanks.

feiliang1983

虚拟地址00000000好像是有特殊作用的受保护地址，不能写入（？？）
在bug.h文件里定义BUG()就是用*(int *)0 = 0实现的，目的是产生oops