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Added check to avoid segmentation fault

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This commit is contained in:
Stefan Wahren 2012-05-06 21:55:39 +02:00
parent 42ed80a5b0
commit 6dd17954d2
1 changed files with 28 additions and 24 deletions
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52
mbus/mbus-protocol.c
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@ -2943,32 +2943,36 @@ mbus_str_xml_encode(u_char *dst, const u_char *src, size_t max_len)
i = 0;
len = 0;
while((len+6) < max_len) {
if (src[i] == '\0')
if (src != NULL)
{
while((len+6) < max_len)
{
break;
}
switch (src[i])
{
case '&':
len += snprintf(&dst[len], max_len - len, "&amp;");
break;
case '<':
len += snprintf(&dst[len], max_len - len, "&lt;");
break;
case '>':
len += snprintf(&dst[len], max_len - len, "&gt;");
break;
case '"':
len += snprintf(&dst[len], max_len - len, "&quot;");
break;
default:
dst[len++] = src[i];
break;
}
if (src[i] == '\0')
{
break;
}
i++;
switch (src[i])
{
case '&':
len += snprintf(&dst[len], max_len - len, "&amp;");
break;
case '<':
len += snprintf(&dst[len], max_len - len, "&lt;");
break;
case '>':
len += snprintf(&dst[len], max_len - len, "&gt;");
break;
case '"':
len += snprintf(&dst[len], max_len - len, "&quot;");
break;
default:
dst[len++] = src[i];
break;
}
i++;
}
}
dst[len] = '\0';