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mprintf: return error on too many arguments

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128 arguments should be enough for everyone
This commit is contained in:
Daniel Stenberg 2016-10-08 20:47:04 +02:00
parent 8238ba9c5f
commit 71588c9aef
1 changed files with 12 additions and 5 deletions
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17
lib/mprintf.c
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@ -227,10 +227,12 @@ static bool dprintf_IsQualifierNoDollar(const char *fmt)
* Create an index with the type of each parameter entry and its
* value (may vary in size)
*
* Returns zero on success.
*
******************************************************************/
static long dprintf_Pass1(const char *format, va_stack_t *vto, char **endpos,
va_list arglist)
static int dprintf_Pass1(const char *format, va_stack_t *vto, char **endpos,
va_list arglist)
{
char *fmt = (char *)format;
int param_num = 0;
@ -393,6 +395,10 @@ static long dprintf_Pass1(const char *format, va_stack_t *vto, char **endpos,
i = this_param - 1;
if((i < 0) || (i >= MAX_PARAMETERS))
/* out of allowed range */
return 1;
switch (*fmt) {
case 'S':
flags |= FLAGS_ALT;
@ -549,7 +555,7 @@ static long dprintf_Pass1(const char *format, va_stack_t *vto, char **endpos,
}
}
return max_param;
return 0;
}
@ -587,7 +593,8 @@ static int dprintf_formatf(
char *workend = &work[sizeof(work) - 2];
/* Do the actual %-code parsing */
dprintf_Pass1(format, vto, endpos, ap_save);
if(dprintf_Pass1(format, vto, endpos, ap_save))
return -1;
end = &endpos[0]; /* the initial end-position from the list dprintf_Pass1()
created for us */
@ -992,7 +999,7 @@ int curl_mvsnprintf(char *buffer, size_t maxlength, const char *format,
info.max = maxlength;
retcode = dprintf_formatf(&info, addbyter, format, ap_save);
if(info.max) {
if((retcode != -1) && info.max) {
/* we terminate this with a zero byte */
if(info.max == info.length)
/* we're at maximum, scrap the last letter */