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

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commit ae7cc577ec2a4a6151c9e928fd1f595d953ecef1 upstream.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Al Viro 2016-08-20 16:33:10 -04:00 • committed by Greg Kroah-Hartman
parent ba5bfcba1f
commit 22782f043e
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 * as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version. * 2 of the Licence, or (at your option) any later version.
*/ */
#include <asm/uaccess.h> #include <linux/uaccess.h>
unsigned long unsigned long
__generic_copy_to_user(void *to, const void *from, unsigned long n) __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)) if (access_ok(VERIFY_READ, from, n))
__copy_user_zeroing(to, from, n); __copy_user_zeroing(to, from, n);
else
memset(to, 0, n);
return n; return n;
} }