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[OpenOCD-commit] Main OpenOCD repository branch, master, updated. v0.12.0-1297-g5ff384be0
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From: openocd-gerrit <ope...@us...> - 2025-11-22 19:25:40
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from 55e916050981af472c1749b8cbb0e4940ba26273 (commit)
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- Log -----------------------------------------------------------------
commit 5ff384be086a82e05901f37e07d16ab2b585c4c8
Author: Kulyatskaya Alexandra <a.k...@sy...>
Date: Mon Oct 6 23:19:56 2025 +0300
semihosting: fix memory leak and double free
Resolve two problems that occurred when working with semihosting service
through multiple connection cycles (connect-disconnect-reconnect):
1) Double free:
When the same service handles multiple connections sequentially,
the same memory gets freed repeatedly, because function
'semihosting_service_connection_closed_handler()' incorrectly frees
service->priv->name on every connection closure.
2) Memory leak:
Function 'free_services()' misses service->priv->name cleanup for
semihosting redirection. Memory remains allocated after service
destruction.
The solution introduces a new 'dtor()' field in the service structure
that is called exactly once during free_service() execution.
To reproduce the issue, you can do the following:
1. openocd -f target.cfg -c init -c 'arm semihosting enable' -c
'arm semihosting_redirect tcp 4445'
# in another terminal
2. nc localhost 4445
3. Ctr+C
4. nc localhost 4445
5. Ctr+C
Change-Id: I0dc8021cc3e21c5af619c71a1821a1afe9bffe78
Signed-off-by: Kulyatskaya Alexandra <a.k...@sy...>
Reviewed-on: https://review.openocd.org/c/openocd/+/9196
Tested-by: jenkins
Reviewed-by: Evgeniy Naydanov <eu...@gm...>
Reviewed-by: Antonio Borneo <bor...@gm...>
diff --git a/src/server/server.c b/src/server/server.c
index 5f6bb584e..494fd9da3 100644
--- a/src/server/server.c
+++ b/src/server/server.c
@@ -161,7 +161,8 @@ static int remove_connection(struct service *service, struct connection *connect
/* find connection */
while ((c = *p)) {
if (c->fd == connection->fd) {
- service->connection_closed(c);
+ if (service->connection_closed)
+ service->connection_closed(c);
if (service->type == CONNECTION_TCP)
close_socket(c->fd);
else if (service->type == CONNECTION_PIPE) {
@@ -190,8 +191,13 @@ static int remove_connection(struct service *service, struct connection *connect
static void free_service(struct service *c)
{
+ if (c->type == CONNECTION_PIPE && c->fd != -1)
+ close(c->fd);
+ if (c->service_dtor)
+ c->service_dtor(c);
free(c->name);
free(c->port);
+ free(c->priv);
free(c);
}
@@ -214,6 +220,7 @@ int add_service(const struct service_driver *driver, const char *port,
c->input = driver->input_handler;
c->connection_closed = driver->connection_closed_handler;
c->keep_client_alive = driver->keep_client_alive_handler;
+ c->service_dtor = driver->service_dtor_handler;
c->priv = priv;
c->next = NULL;
long portnumber;
@@ -390,18 +397,7 @@ static int remove_services(void)
struct service *next = c->next;
remove_connections(c);
-
- free(c->name);
-
- if (c->type == CONNECTION_PIPE) {
- if (c->fd != -1)
- close(c->fd);
- }
- free(c->port);
- free(c->priv);
- /* delete service */
- free(c);
-
+ free_service(c);
/* remember the last service for unlinking */
c = next;
}
diff --git a/src/server/server.h b/src/server/server.h
index ea1e94ec5..393dba769 100644
--- a/src/server/server.h
+++ b/src/server/server.h
@@ -58,6 +58,7 @@ struct service_driver {
int (*new_connection_handler)(struct connection *connection);
/** callback to handle incoming data */
int (*input_handler)(struct connection *connection);
+ void (*service_dtor_handler)(struct service *service);
/** callback to tear down the connection */
int (*connection_closed_handler)(struct connection *connection);
/** called periodically to send keep-alive messages on the connection */
@@ -76,6 +77,7 @@ struct service {
int (*new_connection_during_keep_alive)(struct connection *connection);
int (*new_connection)(struct connection *connection);
int (*input)(struct connection *connection);
+ void (*service_dtor)(struct service *service);
int (*connection_closed)(struct connection *connection);
void (*keep_client_alive)(struct connection *connection);
void *priv;
diff --git a/src/target/semihosting_common.c b/src/target/semihosting_common.c
index ef96f064e..345e542c3 100644
--- a/src/target/semihosting_common.c
+++ b/src/target/semihosting_common.c
@@ -1800,13 +1800,12 @@ static int semihosting_service_input_handler(struct connection *connection)
return ERROR_OK;
}
-static int semihosting_service_connection_closed_handler(struct connection *connection)
+static void semihosting_service_dtor_handler(struct service *service)
{
- struct semihosting_tcp_service *service = connection->service->priv;
- if (service)
- free(service->name);
+ struct semihosting_tcp_service *service_priv = service->priv;
+ if (service_priv)
+ free(service_priv->name);
- return ERROR_OK;
}
static void semihosting_tcp_close_cnx(struct semihosting *semihosting)
@@ -1825,7 +1824,8 @@ static const struct service_driver semihosting_service_driver = {
.new_connection_during_keep_alive_handler = NULL,
.new_connection_handler = semihosting_service_new_connection_handler,
.input_handler = semihosting_service_input_handler,
- .connection_closed_handler = semihosting_service_connection_closed_handler,
+ .service_dtor_handler = semihosting_service_dtor_handler,
+ .connection_closed_handler = NULL,
.keep_client_alive_handler = NULL,
};
-----------------------------------------------------------------------
Summary of changes:
src/server/server.c | 22 +++++++++-------------
src/server/server.h | 2 ++
src/target/semihosting_common.c | 12 ++++++------
3 files changed, 17 insertions(+), 19 deletions(-)
hooks/post-receive
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Main OpenOCD repository
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