From 7f6ab61292ac7950e68aa58664956d97fe0e23f9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marco=20Trevisan=20=28Trevi=C3=B1o=29?= <mail@3v1n0.net>
Date: Thu, 14 Jul 2022 21:14:29 +0200
Subject: [PATCH] fp-device: Return an error if prints are invalid

We'd crash later otherwise, while it's better to return an error.
---
 libfprint/fp-device.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/libfprint/fp-device.c b/libfprint/fp-device.c
index b94f7d80..0d79fae1 100644
--- a/libfprint/fp-device.c
+++ b/libfprint/fp-device.c
@@ -1400,6 +1400,14 @@ fp_device_identify (FpDevice           *device,
       return;
     }
 
+  if (prints == NULL)
+    {
+      g_task_return_error (task,
+                           fpi_device_error_new_msg (FP_DEVICE_ERROR_DATA_INVALID,
+                                                     "Invalid gallery array"));
+      return;
+    }
+
   priv->current_action = FPI_DEVICE_ACTION_IDENTIFY;
   priv->current_task = g_steal_pointer (&task);
   setup_task_cancellable (device);