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authorAl Viro <viro@zeniv.linux.org.uk>2016-08-20 16:18:53 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-09-24 10:07:45 +0200
commit8b3f6edcdd3e71feaf8cb4c428fd1b58fcf1e0b1 (patch)
treedb98dabe673d4493fc78aa98ad6d5d880b410939
parent0be8d73a033a3fee288c8f51990213449e94b204 (diff)
mips: copy_from_user() must zero the destination on access_ok() failure
commit e69d700535ac43a18032b3c399c69bf4639e89a2 upstream. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--arch/mips/include/asm/uaccess.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/mips/include/asm/uaccess.h b/arch/mips/include/asm/uaccess.h
index 095ecafe6bd3..c74c32ccc647 100644
--- 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 *__to, const void *__from, size_t __n);
__cu_len = __invoke_copy_from_user(__cu_to, \
__cu_from, \
__cu_len); \
+ } else { \
+ memset(__cu_to, 0, __cu_len); \
} \
} \
__cu_len; \