NekoCWD/libcamera
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gstreamer: Add error checking in gst_libcamera_src_task_enter()

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The return value from generateConfiguration() was not checked. Only assert
was added as a guard which checked if the size of the generated camera
config was equal to size of roles passed to it.

If the roles variable has an invalid/unsupported role, it will return
a nullptr and then trying to access a member on a nullptr for size comparison
will result in a segmentation fault. So, if the function returns a nullptr,
simply push an error message on GstBus and gracefully exit.

Signed-off-by: Vedant Paranjape <vedantparanjape160201@gmail.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
This commit is contained in:
Vedant Paranjape 2021-06-02 19:41:38 +05:30 • committed by Paul Elder
parent abdb11d9cc
commit 1e5cee7017
1 changed files with 7 additions and 4 deletions
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11
src/gstreamer/gstlibcamerasrc.cpp
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@ -375,10 +375,13 @@ gst_libcamera_src_task_enter(GstTask *task, [[maybe_unused]] GThread *thread,
/* Generate the stream configurations, there should be one per pad. */
state->config_ = state->cam_->generateConfiguration(roles);
/*
* \todo Check if camera may increase or decrease the number of streams
* regardless of the number of roles.
*/
if (state->config_ == nullptr) {
GST_ELEMENT_ERROR(self, RESOURCE, SETTINGS,
("Failed to generate camera configuration from roles"),
("Camera::generateConfiguration() returned nullptr"));
gst_task_stop(task);
return;
}
g_assert(state->config_->size() == state->srcpads_.size());
for (gsize i = 0; i < state->srcpads_.size(); i++) {