[Mesa-dev] [PATCH] st/omx: fix crash when vid_enc_Constructor fails

[Julien Isorce]

It happens when trying to use omxh264enc with nouveau driver
because it does not provide any encoder at the moment.

It crashes on enc_ReleaseTasks(&priv->free_tasks) because
at this time the list is not initialized.
So this patch make sure the lists are initialized.

Another way to fix this would be to do an early return in
enc_ReleaseTasks if head->next is null.
---
 src/gallium/state_trackers/omx/vid_enc.c | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/src/gallium/state_trackers/omx/vid_enc.c b/src/gallium/state_trackers/omx/vid_enc.c
index d70439a..7df5565 100644
--- a/src/gallium/state_trackers/omx/vid_enc.c
+++ b/src/gallium/state_trackers/omx/vid_enc.c
@@ -158,9 +158,14 @@ static OMX_ERRORTYPE vid_enc_Constructor(OMX_COMPONENTTYPE *comp, OMX_STRING nam
    if (!priv)
       return OMX_ErrorInsufficientResources;
 
+   LIST_INITHEAD(&priv->free_tasks);
+   LIST_INITHEAD(&priv->used_tasks);
+   LIST_INITHEAD(&priv->b_frames);
+   LIST_INITHEAD(&priv->stacked_tasks);
+
    r = omx_base_filter_Constructor(comp, name);
    if (r)
-	return r;
+      return r;
 
    priv->BufferMgmtCallback = vid_enc_BufferEncoded;
    priv->messageHandler = vid_enc_MessageHandler;
@@ -256,11 +261,6 @@ static OMX_ERRORTYPE vid_enc_Constructor(OMX_COMPONENTTYPE *comp, OMX_STRING nam
    priv->scale.xWidth = OMX_VID_ENC_SCALING_WIDTH_DEFAULT;
    priv->scale.xHeight = OMX_VID_ENC_SCALING_WIDTH_DEFAULT;
 
-   LIST_INITHEAD(&priv->free_tasks);
-   LIST_INITHEAD(&priv->used_tasks);
-   LIST_INITHEAD(&priv->b_frames);
-   LIST_INITHEAD(&priv->stacked_tasks);
-
    return OMX_ErrorNone;
 }
 
@@ -269,6 +269,9 @@ static OMX_ERRORTYPE vid_enc_Destructor(OMX_COMPONENTTYPE *comp)
    vid_enc_PrivateType* priv = comp->pComponentPrivate;
    int i;
 
+   if (!priv)
+      return OMX_ErrorBadParameter;
+
    enc_ReleaseTasks(&priv->free_tasks);
    enc_ReleaseTasks(&priv->used_tasks);
    enc_ReleaseTasks(&priv->b_frames);
@@ -875,7 +878,7 @@ static void enc_ReleaseTasks(struct list_head *head)
    struct encode_task *i, *next;
 
    if (!head)
-	   return;
+      return;
 
    LIST_FOR_EACH_ENTRY_SAFE(i, next, head, list) {
       pipe_resource_reference(&i->bitstream, NULL);
-- 
1.9.1