[mutter/cherry-pick-4af54225] wayland/dma-buf: Free feedback in surface_feedback_surface_destroyed_cb

[Jonas Ådahl <jadahl src gnome org>]

commit 57cf77b42457a176e5331661ecea0925a6605b8e
Author: Michel Dänzer <mdaenzer redhat com>
Date:   Thu Jun 16 12:17:36 2022 +0200

    wayland/dma-buf: Free feedback in surface_feedback_surface_destroyed_cb
    
    Fixes leak:
    
    ==14889== 2,168 (16 direct, 2,152 indirect) bytes in 1 blocks are definitely lost in loss record 15,308 
of 15,584
    ==14889==    at 0x48445EF: calloc (vg_replace_malloc.c:1328)
    ==14889==    by 0x4BAC1D0: g_malloc0 (gmem.c:155)
    ==14889==    by 0x4AAFF60: meta_wayland_dma_buf_feedback_new (meta-wayland-dma-buf.c:298)
    ==14889==    by 0x4AAFFE0: meta_wayland_dma_buf_feedback_copy (meta-wayland-dma-buf.c:317)
    ==14889==    by 0x4AB16B6: ensure_surface_feedback (meta-wayland-dma-buf.c:1121)
    ==14889==    by 0x4AB1848: dma_buf_handle_get_surface_feedback (meta-wayland-dma-buf.c:1169)
    ==14889==    by 0x66F77E9: ??? (in /usr/lib/x86_64-linux-gnu/libffi.so.8.1.0)
    ==14889==    by 0x66F6922: ??? (in /usr/lib/x86_64-linux-gnu/libffi.so.8.1.0)
    ==14889==    by 0x5318750: ??? (in /usr/lib/x86_64-linux-gnu/libwayland-server.so.0.20.0)
    ==14889==    by 0x5313B99: ??? (in /usr/lib/x86_64-linux-gnu/libwayland-server.so.0.20.0)
    ==14889==    by 0x5316649: wl_event_loop_dispatch (in 
/usr/lib/x86_64-linux-gnu/libwayland-server.so.0.20.0)
    ==14889==    by 0x4AA7C19: wayland_event_source_dispatch (meta-wayland.c:110)
    
    Fixes: 64e6bedb6bcd ("wayland/dma-buf: Add support for scanout surface feedback")
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2469>
    
    
    (cherry picked from commit 4af54225de3a653e7b44ab1905b64ebddf57da4a)

 src/wayland/meta-wayland-dma-buf.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/wayland/meta-wayland-dma-buf.c b/src/wayland/meta-wayland-dma-buf.c
index 6af20cd01a..77d37dfb91 100644
--- a/src/wayland/meta-wayland-dma-buf.c
+++ b/src/wayland/meta-wayland-dma-buf.c
@@ -1104,6 +1104,8 @@ surface_feedback_surface_destroyed_cb (gpointer user_data)
                   NULL);
   g_list_free (surface_feedback->resources);
 
+  meta_wayland_dma_buf_feedback_free (surface_feedback->feedback);
+
   g_free (surface_feedback);
 }