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mn10300: copy_from_user() should zero on access_ok() failure... 

Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
hifive-unleashed-5.1
Al Viro 2016-08-20 16:33:10 -04:00
parent 43403eabf5
commit ae7cc577ec
1 changed files with 3 additions and 1 deletions
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4
arch/mn10300/lib/usercopy.c
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@ -9,7 +9,7 @@
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
#include <asm/uaccess.h>
#include <linux/uaccess.h>
unsigned long
__generic_copy_to_user(void *to, const void *from, unsigned long n)
@ -24,6 +24,8 @@ __generic_copy_from_user(void *to, const void *from, unsigned long n)
{
if (access_ok(VERIFY_READ, from, n))
__copy_user_zeroing(to, from, n);
else
memset(to, 0, n);
return n;
}