| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.7 171/184] mips: copy_from_user() must zero the destination on access_ok() failure | Date | Thu, 22 Sep 2016 19:41:45 +0200 |
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4.7-stable review patch. If anyone has any objections, please let me know.
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From: Al Viro <viro@zeniv.linux.org.uk>
commit e69d700535ac43a18032b3c399c69bf4639e89a2 upstream.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- arch/mips/include/asm/uaccess.h | 3 +++ 1 file changed, 3 insertions(+)
--- a/arch/mips/include/asm/uaccess.h +++ b/arch/mips/include/asm/uaccess.h @@ -14,6 +14,7 @@ #include <linux/kernel.h> #include <linux/errno.h> #include <linux/thread_info.h> +#include <linux/string.h> #include <asm/asm-eva.h> /* @@ -1170,6 +1171,8 @@ extern size_t __copy_in_user_eva(void *_ __cu_len = __invoke_copy_from_user(__cu_to, \ __cu_from, \ __cu_len); \ + } else { \ + memset(__cu_to, 0, __cu_len); \ } \ } \ __cu_len; \
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