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Fix GstAmcSurfaceTexture segfault

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Check that `self` and `self->callback` are defined. `self` can be set to
`NULL` in `remove_listener`, and `self->callback` can be set to `NULL`
inside `gst_amc_surface_texture_jni_set_on_frame_available_callback`.
This can cause a segfault since the Java object can outlive the C
object, and call the callback after `remove_listener` is called.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2024>
This commit is contained in:
Andrew Pritchard 2022-03-25 14:25:02 +11:00 committed by GStreamer Marge Bot
parent 4a2e0c1f4c
commit 432354e6d4
1 changed files with 2 additions and 0 deletions
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2
subprojects/gst-plugins-bad/sys/androidmedia/jni/gstamcsurfacetexture-jni.c
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@ -243,6 +243,8 @@ on_frame_available_cb (JNIEnv * env, jobject thiz,
long long context, jobject surfaceTexture)
{
GstAmcSurfaceTextureJNI *self = JLONG_TO_GPOINTER (context);
if (!self || !self->callback)
return;
self->callback (GST_AMC_SURFACE_TEXTURE (self), self->user_data);
}