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basesrc: Protect access to pool and allocator

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This was only partly protected by the object lock. Always take the
object lock to access the currently configured pool and allocator.

https://bugzilla.gnome.org/show_bug.cgi?id=783301
This commit is contained in:
Nicolas Dufresne 2017-06-01 10:01:13 -04:00
parent a8acba142f
commit 946622ec3f
1 changed files with 31 additions and 5 deletions
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36
libs/gst/base/gstbasesrc.c
View file

@ -1420,11 +1420,23 @@ gst_base_src_default_alloc (GstBaseSrc * src, guint64 offset,
{
GstFlowReturn ret;
GstBaseSrcPrivate *priv = src->priv;
GstBufferPool *pool = NULL;
GstAllocator *allocator = NULL;
GstAllocationParams params;
GST_OBJECT_LOCK (src);
if (priv->pool) {
ret = gst_buffer_pool_acquire_buffer (priv->pool, buffer, NULL);
pool = gst_object_ref (priv->pool);
} else if (priv->allocator) {
allocator = gst_object_ref (priv->allocator);
}
params = priv->params;
GST_OBJECT_UNLOCK (src);
if (pool) {
ret = gst_buffer_pool_acquire_buffer (pool, buffer, NULL);
} else if (size != -1) {
*buffer = gst_buffer_new_allocate (priv->allocator, size, &priv->params);
*buffer = gst_buffer_new_allocate (allocator, size, &params);
if (G_UNLIKELY (*buffer == NULL))
goto alloc_failed;
@ -1434,13 +1446,21 @@ gst_base_src_default_alloc (GstBaseSrc * src, guint64 offset,
size);
goto alloc_failed;
}
done:
if (pool)
gst_object_unref (pool);
if (allocator)
gst_object_unref (allocator);
return ret;
/* ERRORS */
alloc_failed:
{
GST_ERROR_OBJECT (src, "Failed to allocate %u bytes", size);
return GST_FLOW_ERROR;
ret = GST_FLOW_ERROR;
goto done;
}
}
@ -3866,12 +3886,16 @@ failure:
GstBufferPool *
gst_base_src_get_buffer_pool (GstBaseSrc * src)
{
GstBufferPool *ret = NULL;
g_return_val_if_fail (GST_IS_BASE_SRC (src), NULL);
GST_OBJECT_LOCK (src);
if (src->priv->pool)
return gst_object_ref (src->priv->pool);
ret = gst_object_ref (src->priv->pool);
GST_OBJECT_UNLOCK (src);
return NULL;
return ret;
}
/**
@ -3893,10 +3917,12 @@ gst_base_src_get_allocator (GstBaseSrc * src,
{
g_return_if_fail (GST_IS_BASE_SRC (src));
GST_OBJECT_LOCK (src);
if (allocator)
*allocator = src->priv->allocator ?
gst_object_ref (src->priv->allocator) : NULL;
if (params)
*params = src->priv->params;
GST_OBJECT_UNLOCK (src);
}