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scd: Make sure releasing PC/SC context.

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* scd/apdu.c (release_pcsc_context): New.
(close_pcsc_reader): Use release_pcsc_context.  Add assertion.
(apdu_dev_list_start): Replace call of close_pcsc_reader
into release_pcsc_context, add condition.

--

GnuPG-bug-id: 5416
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2021-05-10 10:31:08 +09:00
parent 0498ea8fbd
commit cccc9bd5db
1 changed files with 16 additions and 6 deletions
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22
scd/apdu.c
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@ -826,19 +826,27 @@ control_pcsc (int slot, pcsc_dword_t ioctl_code,
}
static void
release_pcsc_context (void)
{
/*log_debug ("%s: releasing context\n", __func__);*/
log_assert (pcsc.context != 0);
pcsc_release_context (pcsc.context);
pcsc.context = 0;
}
static int
close_pcsc_reader (int slot)
{
/*log_debug ("%s: count=%d (ctx=%x)\n", __func__, pcsc.count, pcsc.context);*/
(void)slot;
if (!pcsc.count || !--pcsc.count)
log_assert (pcsc.count > 0);
if (!--pcsc.count)
{
int i;
/*log_debug ("%s: releasing context\n", __func__);*/
if (pcsc.context)
pcsc_release_context (pcsc.context);
pcsc.context = 0;
release_pcsc_context ();
for (i = 0; i < MAX_READER; i++)
pcsc.rdrname[i] = NULL;
}
@ -2041,8 +2049,9 @@ apdu_dev_list_start (const char *portstr, struct dev_list **l_p)
err = gpg_error_from_syserror ();
log_error ("error allocating memory for reader list\n");
if (pcsc.count == 0)
release_pcsc_context ();
npth_mutex_unlock (&reader_table_lock);
close_pcsc_reader (0);
xfree (dl);
return err;
}
@ -2053,8 +2062,9 @@ apdu_dev_list_start (const char *portstr, struct dev_list **l_p)
log_error ("pcsc_list_readers failed: %s (0x%lx)\n",
pcsc_error_string (r), r);
xfree (p);
if (pcsc.count == 0)
release_pcsc_context ();
npth_mutex_unlock (&reader_table_lock);
close_pcsc_reader (0);
xfree (dl);
return iso7816_map_sw (pcsc_error_to_sw (r));
}