Em Sat, Jun 01, 2002 at 01:40:03AM -0700, Andrew Morton escreveu:
> A common and very subtle bug is to use list_heads which aren't on any
> lists. It causes kernel memory corruption which is observed long after
> the offending code has executed.
> The patch nulls out the dangling pointers so we get a nice oops at the
> site of the buggy code.
> =====================================
>
> --- 2.5.19/include/linux/list.h~list-debug Sat Jun 1 01:18:05 2002
> +++ 2.5.19-akpm/include/linux/list.h Sat Jun 1 01:18:05 2002
> @@ -94,6 +94,11 @@ static __inline__ void __list_del(struct
> static __inline__ void list_del(struct list_head *entry)
> {
> __list_del(entry->prev, entry->next);
#ifdef CONFIG_DEBUG_LIST_DEL_NULLIFY
> + entry->next = 0;
> + entry->prev = 0;
#endif
> }
8) And get this configured in the Debug section of make *config
The kernel will always have bugs ;)
- Arnaldo
-
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