[gimp] plug-ins: consider reading less bytes than we need an error in psd-util.

[Jacob Boerema <jboerema src gnome org>]

commit 3da302adce5564f9ebf41ce7caa2ac99353059f4
Author: Jacob Boerema <jgboerema gmail com>
Date:   Wed May 12 16:42:58 2021 -0400

    plug-ins: consider reading less bytes than we need an error in psd-util.

 plug-ins/file-psd/psd-util.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/plug-ins/file-psd/psd-util.c b/plug-ins/file-psd/psd-util.c
index 63f2a7fa97..9ea1260f41 100644
--- a/plug-ins/file-psd/psd-util.c
+++ b/plug-ins/file-psd/psd-util.c
@@ -191,8 +191,12 @@ psd_read (GInputStream  *input,
    */
   if (count > 0)
     {
-      g_input_stream_read_all (input, (void *) data, count,
-                               &bytes_read, NULL, error);
+      /* We consider reading less bytes than we want an error. */
+      if (g_input_stream_read_all (input, (void *) data, count,
+                                   &bytes_read, NULL, error) &&
+          bytes_read < count)
+        g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
+                     _("Unexpected end of file"));
     }
 
   return bytes_read;