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strtoofft: reduce integer overflow risks globally

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... make sure we bail out on overflows.

Reported-by: Brian Carpenter
Closes #1758
This commit is contained in:
Daniel Stenberg 2017-08-14 23:33:23 +02:00
parent b53b4e4424
commit ff50fe0348
No known key found for this signature in database
GPG key ID: 5CC908FDB71E12C2
13 changed files with 196 additions and 131 deletions
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11
src/tool_getparam.c
View file

@ -590,7 +590,11 @@ ParameterError getparameter(const char *flag, /* f or -long-flag */
{
/* We support G, M, K too */
char *unit;
curl_off_t value = curlx_strtoofft(nextarg, &unit, 0);
curl_off_t value;
if(curlx_strtoofft(nextarg, &unit, 0, &value)) {
warnf(global, "unsupported rate\n");
return PARAM_BAD_USE;
}
if(!*unit)
unit = (char *)"b";
@ -1843,10 +1847,13 @@ ParameterError getparameter(const char *flag, /* f or -long-flag */
if(ISDIGIT(*nextarg) && !strchr(nextarg, '-')) {
char buffer[32];
curl_off_t off;
if(curlx_strtoofft(nextarg, NULL, 10, &off)) {
warnf(global, "unsupported range point\n");
return PARAM_BAD_USE;
}
warnf(global,
"A specified range MUST include at least one dash (-). "
"Appending one for you!\n");
off = curlx_strtoofft(nextarg, NULL, 10);
snprintf(buffer, sizeof(buffer), "%" CURL_FORMAT_CURL_OFF_T "-", off);
Curl_safefree(config->range);
config->range = strdup(buffer);

10
src/tool_paramhlp.c
View file

@ -400,9 +400,13 @@ ParameterError str2offset(curl_off_t *val, const char *str)
return PARAM_NEGATIVE_NUMERIC;
#if(CURL_SIZEOF_CURL_OFF_T > CURL_SIZEOF_LONG)
*val = curlx_strtoofft(str, &endptr, 0);
if((*val == CURL_OFF_T_MAX || *val == CURL_OFF_T_MIN) && (errno == ERANGE))
return PARAM_NUMBER_TOO_LARGE;
{
CURLofft offt = curlx_strtoofft(str, &endptr, 0, val);
if(CURL_OFFT_FLOW == offt)
return PARAM_NUMBER_TOO_LARGE;
else if(CURL_OFFT_INVAL == offt)
return PARAM_BAD_NUMERIC;
}
#else
errno = 0;
*val = strtol(str, &endptr, 0);