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    Subject[PATCH 4.4 114/118] mn10300: copy_from_user() should zero on access_ok() failure...
    Date
    4.4-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Al Viro <viro@zeniv.linux.org.uk>

    commit ae7cc577ec2a4a6151c9e928fd1f595d953ecef1 upstream.

    Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    arch/mn10300/lib/usercopy.c | 4 +++-
    1 file changed, 3 insertions(+), 1 deletion(-)

    --- a/arch/mn10300/lib/usercopy.c
    +++ b/arch/mn10300/lib/usercopy.c
    @@ -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
    {
    if (access_ok(VERIFY_READ, from, n))
    __copy_user_zeroing(to, from, n);
    + else
    + memset(to, 0, n);
    return n;
    }


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