diff options
Diffstat (limited to 'include/asm-generic/uaccess.h')
| -rw-r--r-- | include/asm-generic/uaccess.h | 28 |
1 files changed, 11 insertions, 17 deletions
diff --git a/include/asm-generic/uaccess.h b/include/asm-generic/uaccess.h index a0b2f270dddc..2f8a5d3bbd57 100644 --- a/include/asm-generic/uaccess.h +++ b/include/asm-generic/uaccess.h @@ -246,11 +246,15 @@ extern int __get_user_bad(void) __attribute__((noreturn)); /* * Copy a null terminated string from userspace. */ -#ifndef __strncpy_from_user +#ifndef strncpy_from_user static inline long -__strncpy_from_user(char *dst, const char __user *src, long count) +strncpy_from_user(char *dst, const char __user *src, long count) { char *tmp; + + if (!access_ok(src, 1)) + return -EFAULT; + strncpy(dst, (const char __force *)src, count); for (tmp = dst; *tmp && count > 0; tmp++, count--) ; @@ -258,24 +262,12 @@ __strncpy_from_user(char *dst, const char __user *src, long count) } #endif -static inline long -strncpy_from_user(char *dst, const char __user *src, long count) -{ - if (!access_ok(src, 1)) - return -EFAULT; - return __strncpy_from_user(dst, src, count); -} - +#ifndef strnlen_user /* * Return the size of a string (including the ending 0) * * Return 0 on exception, a value greater than N if too long - */ -#ifndef __strnlen_user -#define __strnlen_user(s, n) (strnlen((s), (n)) + 1) -#endif - -/* + * * Unlike strnlen, strnlen_user includes the nul terminator in * its returned count. Callers should check for a returned value * greater than N as an indication the string is too long. @@ -284,8 +276,10 @@ static inline long strnlen_user(const char __user *src, long n) { if (!access_ok(src, 1)) return 0; - return __strnlen_user(src, n); + + return strnlen(src, n) + 1; } +#endif /* * Zero Userspace |