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Fix memory leak ambiguity with executable names

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This commit is contained in:
Marc Di Luzio 2019-05-18 09:34:36 +01:00
parent 9db7442a31
commit 44ab695246
1 changed files with 17 additions and 15 deletions
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32
daemon/gamemode.c
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@ -56,7 +56,7 @@ POSSIBILITY OF SUCH DAMAGE.
typedef struct GameModeClient {
pid_t pid; /**< Process ID */
struct GameModeClient *next; /**<Next client in the list */
char *executable; /**<Process executable */
char executable[PATH_MAX]; /**<Process executable */
} GameModeClient;
struct GameModeContext {
@ -331,28 +331,34 @@ int game_mode_context_register(GameModeContext *self, pid_t client, pid_t reques
/* Construct a new client if we can */
GameModeClient *cl = NULL;
char *executable = NULL;
int err = -1;
/* Check our requester config first */
if (requester != client) {
/* Lookup the executable first */
executable = game_mode_context_find_exe(requester);
if (!executable) {
return -1;
goto error_cleanup;
}
/* Check our blacklist and whitelist */
if (!config_get_supervisor_whitelisted(self->config, executable)) {
LOG_MSG("Supervisor [%s] was rejected (not in whitelist)\n", executable);
free(executable);
return -2;
err = -2;
goto error_cleanup;
} else if (config_get_supervisor_blacklisted(self->config, executable)) {
LOG_MSG("Supervisor [%s] was rejected (in blacklist)\n", executable);
free(executable);
return -2;
err = -2;
goto error_cleanup;
}
/* We're done with the requestor */
free(executable);
executable = NULL;
} else if (config_get_require_supervisor(self->config)) {
LOG_ERROR("Direct request made but require_supervisor was set, rejecting request!\n");
return -2;
err = -2;
goto error_cleanup;
}
/* Cap the total number of active clients */
@ -392,10 +398,9 @@ int game_mode_context_register(GameModeContext *self, pid_t client, pid_t reques
/* From now on we depend on the client, initialize it */
cl = game_mode_client_new(client, executable);
if (cl)
executable = NULL; // ownership has been delegated
else
if (!cl)
goto error_cleanup;
free(executable); /* we're now done with memory */
/* Begin a write lock now to insert our new client at list start */
pthread_rwlock_wrlock(&self->rwlock);
@ -430,7 +435,7 @@ error_cleanup:
LOG_ERROR("Failed to register client [%d]: %s\n", client, strerror(errno));
free(executable);
game_mode_client_free(cl);
return -1;
return err;
}
int game_mode_context_unregister(GameModeContext *self, pid_t client, pid_t requester)
@ -580,7 +585,6 @@ int game_mode_context_query_status(GameModeContext *self, pid_t client, pid_t re
static GameModeClient *game_mode_client_new(pid_t pid, char *executable)
{
GameModeClient c = {
.executable = executable,
.next = NULL,
.pid = pid,
};
@ -591,6 +595,7 @@ static GameModeClient *game_mode_client_new(pid_t pid, char *executable)
return NULL;
}
*ret = c;
strncpy(ret->executable, executable, PATH_MAX);
return ret;
}
@ -605,9 +610,6 @@ static void game_mode_client_free(GameModeClient *client)
if (client->next) {
game_mode_client_free(client->next);
}
if (client->executable) {
free(client->executable);
}
free(client);
}