diff options
Diffstat (limited to 'stdio-common/vfprintf.c')
| -rw-r--r-- | stdio-common/vfprintf.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/stdio-common/vfprintf.c b/stdio-common/vfprintf.c index 4f0d971c55..20638ad1fd 100644 --- a/stdio-common/vfprintf.c +++ b/stdio-common/vfprintf.c @@ -1026,10 +1026,11 @@ vfprintf (FILE *s, const CHAR_T *format, va_list ap) const char *mbs = (const char *) string; \ mbstate_t mbstate; \ \ - len = prec != -1 ? (size_t) prec : strlen (mbs); \ + len = prec != -1 ? __strnlen (mbs, (size_t) prec) : strlen (mbs); \ \ /* Allocate dynamically an array which definitely is long \ - enough for the wide character version. */ \ + enough for the wide character version. Each byte in the \ + multi-byte string can produce at most one wide character. */ \ if (__libc_use_alloca (len * sizeof (wchar_t))) \ string = (CHAR_T *) alloca (len * sizeof (wchar_t)); \ else if ((string = (CHAR_T *) malloc (len * sizeof (wchar_t))) \ |