[PATCH] mincore() should return EINVAL for length < 0

[Badari Pulavarty <pbadari@us.ibm.com>]

Hi,

Here is the simple patch to fix mincore() returning
wrong error. mincore(2) manpage says, it should
return EINVAL, if length is non-positive.

Bug details are in:

http://bugme.osdl.org/show_bug.cgi?id=4612

Thanks,
Badari


Signed-off-by: Badari Pulabarty <pbadari@us.ibm.com>
--- linux-2.6.14-rc3.org/mm/mincore.c	2005-10-10 17:14:30.000000000 -0700
+++ linux-2.6.14-rc3/mm/mincore.c	2005-10-10 17:26:52.000000000 -0700
@@ -115,7 +115,7 @@ asmlinkage long sys_mincore(unsigned lon
 	long error;
 
 	/* check the arguments */
- 	if (start & ~PAGE_CACHE_MASK)
+ 	if ((start & ~PAGE_CACHE_MASK) || ((ssize_t)len < 0))
 		goto einval;
 
 	limit = TASK_SIZE;