Title: [6585] trunk/arch/blackfin/include/asm/uaccess.h: add access checking to clear_user
- Revision
- 6585
- Author
- vapier
- Date
- 2009-06-04 14:19:21 -0500 (Thu, 04 Jun 2009)
Log Message
add access checking to clear_user
Modified Paths
Diff
Modified: trunk/arch/blackfin/include/asm/uaccess.h (6584 => 6585)
--- trunk/arch/blackfin/include/asm/uaccess.h 2009-06-04 19:13:52 UTC (rev 6584)
+++ trunk/arch/blackfin/include/asm/uaccess.h 2009-06-04 19:19:21 UTC (rev 6585)
@@ -244,6 +244,8 @@
static inline unsigned long __must_check
__clear_user(void *to, unsigned long n)
{
+ if (!access_ok(VERIFY_WRITE, src, n))
+ return n;
memset(to, 0, n);
return 0;
}
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