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Fixed possible memory leaks in dbfwfilter.c

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Made some variables stack allocated so there is no change of memory leaking.
There was no real reason to allocate memory from the heap for the variables in
question since they did not need to persist outside the scope of the function.
This commit is contained in:
Markus Makela 2015-12-07 18:27:30 +02:00
parent 0ea22ddaea
commit 3d20beef8c
1 changed files with 10 additions and 18 deletions
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28
server/modules/filter/dbfwfilter.c
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@ -989,7 +989,7 @@ bool parse_rule_definition(FW_INSTANCE* instance, RULE* ruledef, char* rule, cha
{
bool escaped = false;
regex_t *re;
char* start, *str;
char* start;
tok = strtok_r(NULL, " ", saveptr);
char delim = '\'';
int n_char = 0;
@ -1042,20 +1042,13 @@ bool parse_rule_definition(FW_INSTANCE* instance, RULE* ruledef, char* rule, cha
goto retblock;
}
str = calloc(((tok - start) + 1), sizeof(char));
if (str == NULL)
{
MXS_ERROR("Fatal Error: malloc returned NULL.");
rval = false;
goto retblock;
}
char str[(tok - start) + 1];
re = (regex_t*) malloc(sizeof(regex_t));
if (re == NULL)
{
MXS_ERROR("Fatal Error: malloc returned NULL.");
rval = false;
free(str);
goto retblock;
}
@ -1073,7 +1066,6 @@ bool parse_rule_definition(FW_INSTANCE* instance, RULE* ruledef, char* rule, cha
ruledef->type = RT_REGEX;
ruledef->data = (void*) re;
}
free(str);
}
else if (strcmp(tok, "limit_queries") == 0)
@ -1267,11 +1259,8 @@ createInstance(char **options, FILTER_PARAMETER **params)
{
if (strcmp(params[i]->name, "rules") == 0)
{
if (filename)
{
free(filename);
}
filename = strdup(params[i]->value);
filename = params[i]->value;
break;
}
}
@ -1282,6 +1271,7 @@ createInstance(char **options, FILTER_PARAMETER **params)
if (strcmp(options[i], "ignorecase") == 0)
{
my_instance->regflags |= REG_ICASE;
break;
}
}
}
@ -1300,7 +1290,6 @@ createInstance(char **options, FILTER_PARAMETER **params)
MXS_ERROR("Error while opening rule file for firewall filter.");
hashtable_free(my_instance->htable);
free(my_instance);
free(filename);
return NULL;
}
@ -1350,16 +1339,15 @@ createInstance(char **options, FILTER_PARAMETER **params)
if (file_empty)
{
MXS_ERROR("dbfwfilter: File is empty: %s", filename);
free(filename);
err = true;
goto retblock;
}
fclose(file);
free(filename);
/**Apply the rules to users*/
ptr = my_instance->userstrings;
my_instance->userstrings = NULL;
if (ptr == NULL)
{
@ -2182,6 +2170,10 @@ bool parse_at_times(const char** tok, char** saveptr, RULE* ruledef)
{
ruledef->active = tr;
}
else
{
free(tr);
}
return success;
}