linux-kernel - [PATCH] staging: vc04_services: use snprintf instead of sprintf

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Message-ID: <20231025122632.307385-4-ricardo@marliere.net>
Date:   Wed, 25 Oct 2023 09:26:34 -0300
From:   "Ricardo B. Marliere" <ricardo@...liere.net>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Florian Fainelli <florian.fainelli@...adcom.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Umang Jain <umang.jain@...asonboard.com>,
        Kieran Bingham <kieran.bingham@...asonboard.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Stefan Wahren <stefan.wahren@...e.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Arnd Bergmann <arnd@...db.de>
Cc:     bcm-kernel-feedback-list@...adcom.com,
        linux-staging@...ts.linux.dev,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        "Ricardo B. Marliere" <ricardo@...liere.net>,
        Dan Carpenter <dan.carpenter@...aro.org>
Subject: [PATCH] staging: vc04_services: use snprintf instead of sprintf

All the occurrences of sprintf usage under vc04_services can be safely
replaced by snprintf, so as to avoid any possible overflow.

Suggested-by: Dan Carpenter <dan.carpenter@...aro.org>
Suggested-by: Umang Jain <umang.jain@...asonboard.com>
Signed-off-by: Ricardo B. Marliere <ricardo@...liere.net>
---
 .../bcm2835-camera/bcm2835-camera.c              |  2 +-
 .../interface/vchiq_arm/vchiq_arm.c              | 16 ++++++++--------
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
index e860fb89d42e..e6e89784d84b 100644
--- a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
+++ b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
@@ -855,7 +855,7 @@ static int vidioc_enum_input(struct file *file, void *priv,
 		return -EINVAL;
 
 	inp->type = V4L2_INPUT_TYPE_CAMERA;
-	sprintf((char *)inp->name, "Camera %u", inp->index);
+	snprintf((char *)inp->name, sizeof(inp->name), "Camera %u", inp->index);
 	return 0;
 }
 
diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
index de6a24304a4d..9fb8f657cc78 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
@@ -1451,12 +1451,12 @@ vchiq_use_internal(struct vchiq_state *state, struct vchiq_service *service,
 	}
 
 	if (use_type == USE_TYPE_VCHIQ) {
-		sprintf(entity, "VCHIQ:   ");
+		snprintf(entity, sizeof(entity), "VCHIQ:   ");
 		entity_uc = &arm_state->peer_use_count;
 	} else if (service) {
-		sprintf(entity, "%p4cc:%03d",
-			&service->base.fourcc,
-			service->client_id);
+		snprintf(entity, sizeof(entity), "%p4cc:%03d",
+			 &service->base.fourcc,
+			 service->client_id);
 		entity_uc = &service->service_use_count;
 	} else {
 		vchiq_log_error(state->dev, VCHIQ_SUSPEND, "%s null service ptr", __func__);
@@ -1506,12 +1506,12 @@ vchiq_release_internal(struct vchiq_state *state, struct vchiq_service *service)
 	}
 
 	if (service) {
-		sprintf(entity, "%p4cc:%03d",
-			&service->base.fourcc,
-			service->client_id);
+		snprintf(entity, sizeof(entity), "%p4cc:%03d",
+			 &service->base.fourcc,
+			 service->client_id);
 		entity_uc = &service->service_use_count;
 	} else {
-		sprintf(entity, "PEER:   ");
+		snprintf(entity, sizeof(entity), "PEER:   ");
 		entity_uc = &arm_state->peer_use_count;
 	}
 
-- 
2.42.0