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device: Fix memory management of gallery passed to identify

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We cannot make any assumptions about the passed GPtrArray. As such, we
must copy the content and grab our own reference for each of the prints.
This commit is contained in:
Benjamin Berg 2020-12-09 10:55:52 +01:00
parent 28ba6a0de9
commit 91ee03eb7a
1 changed files with 8 additions and 1 deletions
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9
libfprint/fp-device.c
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@ -1018,6 +1018,7 @@ fp_device_identify (FpDevice *device,
g_autoptr(GTask) task = NULL;
FpDevicePrivate *priv = fp_device_get_instance_private (device);
FpMatchData *data;
int i;
task = g_task_new (device, cancellable, callback, user_data);
if (g_task_return_error_if_cancelled (task))
@ -1042,7 +1043,13 @@ fp_device_identify (FpDevice *device,
maybe_cancel_on_cancelled (device, cancellable);
data = g_new0 (FpMatchData, 1);
data->gallery = g_ptr_array_ref (prints);
/* We cannot store the gallery directly, because the ptr array may not own
* a reference to each print. Also, the caller could in principle modify the
* GPtrArray afterwards.
*/
data->gallery = g_ptr_array_new_full (prints->len, g_object_unref);
for (i = 0; i < prints->len; i++)
g_ptr_array_add (data->gallery, g_object_ref (g_ptr_array_index (prints, i)));
data->match_cb = match_cb;
data->match_data = match_data;
data->match_destroy = match_destroy;