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Free C-string allocated by strdup after use #2895

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Free C-string allocated by strdup after use #2895

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4 changes: 3 additions & 1 deletion judge/runguard.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -806,12 +806,14 @@ void setrestrictions()

/* Set additional environment variables. */
for (const auto &tokens : environment_variables) {
char *token = strtok(strdup(tokens.c_str()), ";");
char *tokens_dup = strdup(tokens.c_str());
char *token = strtok(tokens_dup, ";");
while (token != nullptr) {
verbose("setting environment variable: %s", token);
putenv(token);
token = strtok(nullptr, ";");
}
free(tokens_dup);
}

/* Set resource limits: must be root to raise hard limits.
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