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From 250db0df9643d122e00313313102c642f1adac72 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.org>
Date: Thu, 2 May 2019 15:50:01 +0100
Subject: [PATCH] staging: mmal-vchiq: Fix memory leak in error path
On error, vchiq_mmal_component_init could leave the
event context allocated for ports.
Clean them up in the error path.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
---
.../vc04_services/vchiq-mmal/mmal-vchiq.c | 27 +++++++++++++------
1 file changed, 19 insertions(+), 8 deletions(-)
--- a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
+++ b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
@@ -1848,9 +1848,26 @@ static void free_event_context(struct vc
{
struct mmal_msg_context *ctx = port->event_context;
+ if (!ctx)
+ return;
+
kfree(ctx->u.bulk.buffer->buffer);
kfree(ctx->u.bulk.buffer);
release_msg_context(ctx);
+ port->event_context = NULL;
+}
+
+static void release_all_event_contexts(struct vchiq_mmal_component *component)
+{
+ int idx;
+
+ for (idx = 0; idx < component->inputs; idx++)
+ free_event_context(&component->input[idx]);
+ for (idx = 0; idx < component->outputs; idx++)
+ free_event_context(&component->output[idx]);
+ for (idx = 0; idx < component->clocks; idx++)
+ free_event_context(&component->clock[idx]);
+ free_event_context(&component->control);
}
/* Initialise a mmal component and its ports
@@ -1948,6 +1965,7 @@ int vchiq_mmal_component_init(struct vch
release_component:
destroy_component(instance, component);
+ release_all_event_contexts(component);
unlock:
if (component)
component->in_use = 0;
@@ -1975,14 +1993,7 @@ int vchiq_mmal_component_finalise(struct
component->in_use = 0;
- for (idx = 0; idx < component->inputs; idx++)
- free_event_context(&component->input[idx]);
- for (idx = 0; idx < component->outputs; idx++)
- free_event_context(&component->output[idx]);
- for (idx = 0; idx < component->clocks; idx++)
- free_event_context(&component->clock[idx]);
-
- free_event_context(&component->control);
+ release_all_event_contexts(component);
mutex_unlock(&instance->vchiq_mutex);
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