[PATCH v4 1/7] ui/egl-helpers: Error check the fds in egl_dmabuf_export_texture()

[Vivek Kasireddy <vivek.kasireddy@intel.com>]

While trying to export and obtain fds associated with a texture, it
is possible that the fds returned after eglExportDMABUFImageMESA()
call are -1. Therefore, we need to evaluate the value of all fds
and return false if any of them are -1.

Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
Cc: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Cc: Frediano Ziglio <freddy77@gmail.com>
Cc: Dongwon Kim <dongwon.kim@intel.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
---
 ui/egl-helpers.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/ui/egl-helpers.c b/ui/egl-helpers.c
index 9cda2bbbee..07d8edd3dc 100644
--- a/ui/egl-helpers.c
+++ b/ui/egl-helpers.c
@@ -289,6 +289,7 @@ bool egl_dmabuf_export_texture(uint32_t tex_id, int *fd, EGLint *offset,
 {
     EGLImageKHR image;
     EGLuint64KHR modifiers[DMABUF_MAX_PLANES];
+    int i;
 
     image = eglCreateImageKHR(qemu_egl_display, eglGetCurrentContext(),
                               EGL_GL_TEXTURE_2D_KHR,
@@ -308,6 +309,11 @@ bool egl_dmabuf_export_texture(uint32_t tex_id, int *fd, EGLint *offset,
         *modifier = modifiers[0];
     }
 
+    for (i = 0; i < *num_planes; i++) {
+        if (fd[i] < 0) {
+            return false;
+        }
+    }
     return true;
 }
 
-- 
2.49.0