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Diffstat (limited to 'include/linux/string.h')
-rw-r--r--include/linux/string.h8
1 files changed, 6 insertions, 2 deletions
diff --git a/include/linux/string.h b/include/linux/string.h
index 410ecf17de3c..dd39a690c841 100644
--- a/include/linux/string.h
+++ b/include/linux/string.h
@@ -11,6 +11,7 @@
extern char *strndup_user(const char __user *, long);
extern void *memdup_user(const void __user *, size_t);
+extern void *vmemdup_user(const void __user *, size_t);
extern void *memdup_user_nul(const void __user *, size_t);
/*
@@ -28,7 +29,7 @@ extern char * strncpy(char *,const char *, __kernel_size_t);
size_t strlcpy(char *, const char *, size_t);
#endif
#ifndef __HAVE_ARCH_STRSCPY
-ssize_t __must_check strscpy(char *, const char *, size_t);
+ssize_t strscpy(char *, const char *, size_t);
#endif
#ifndef __HAVE_ARCH_STRCAT
extern char * strcat(char *, const char *);
@@ -259,7 +260,10 @@ __FORTIFY_INLINE __kernel_size_t strlen(const char *p)
{
__kernel_size_t ret;
size_t p_size = __builtin_object_size(p, 0);
- if (p_size == (size_t)-1)
+
+ /* Work around gcc excess stack consumption issue */
+ if (p_size == (size_t)-1 ||
+ (__builtin_constant_p(p[p_size - 1]) && p[p_size - 1] == '\0'))
return __builtin_strlen(p);
ret = strnlen(p, p_size);
if (p_size <= ret)