scd: Fix memory leak in ccid-driver.

* scd/ccid-driver.c (ccid_dev_scan): Use loop var and not the count.
--

Due to an assignment out of bounds this might lead to a crash if there
are more than 15 readers.  In any case it fixes a memory leak.
Kudos to the friendly auditor who found that bug.

Fixes-commit: 8a41e73c31adb86d4a7dca4da695e5ad1347811f

1 files changed, 9 insertions, 9 deletions

diff --git a/scd/ccid-driver.c b/scd/ccid-driver.c
index 9d0d6ebe4..e06b659e1 100644
--- a/scd/ccid-driver.c
+++ b/scd/ccid-driver.c
@@ -1428,15 +1428,15 @@ ccid_dev_scan (int *idx_max_p, void **t_p)
     {
       for (i = 0; i < idx; i++)
         {
-          free (ccid_dev_table[idx].ifcdesc_extra);
-          ccid_dev_table[idx].n = 0;
-          ccid_dev_table[idx].interface_number = 0;
-          ccid_dev_table[idx].setting_number = 0;
-          ccid_dev_table[idx].ifcdesc_extra = NULL;
-          ccid_dev_table[idx].ifcdesc_extra_len = 0;
-          ccid_dev_table[idx].ep_bulk_out = 0;
-          ccid_dev_table[idx].ep_bulk_in = 0;
-          ccid_dev_table[idx].ep_intr = 0;
+          free (ccid_dev_table[i].ifcdesc_extra);
+          ccid_dev_table[i].n = 0;
+          ccid_dev_table[i].interface_number = 0;
+          ccid_dev_table[i].setting_number = 0;
+          ccid_dev_table[i].ifcdesc_extra = NULL;
+          ccid_dev_table[i].ifcdesc_extra_len = 0;
+          ccid_dev_table[i].ep_bulk_out = 0;
+          ccid_dev_table[i].ep_bulk_in = 0;
+          ccid_dev_table[i].ep_intr = 0;
         }
       libusb_free_device_list (ccid_usb_dev_list, 1);
       ccid_usb_dev_list = NULL;