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scd: Fix RESET command handling (more).

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* scd/app-common.h (struct app_ctx_s): Add reset_requested.
* scd/app.c (app_reset): Locking APP, set reset_requested.
(deallocate_app): Release the lock.
(release_application): Add LOCKED_ALREADY argument.
(scd_update_reader_status_file): Hold the lock when accessing APP.
When reset_requested is set, close the reader and deallocate APP.
* scd/command.c (open_card_with_request, cmd_restart): Follow the
change of release_application.
(send_client_notifications): Here it calls release_application holding
the lock.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2017-02-17 11:50:40 +09:00
parent 7006352da7
commit 99d4dfe836
3 changed files with 26 additions and 12 deletions
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29
scd/app.c
View file

@ -143,19 +143,23 @@ app_reset (app_t app, ctrl_t ctrl, int send_reset)
if (send_reset)
{
int sw = apdu_reset (app->slot);
int sw;
lock_app (app, ctrl);
sw = apdu_reset (app->slot);
if (sw)
err = gpg_error (GPG_ERR_CARD_RESET);
/* Release the same application which is used by all sessions. */
send_client_notifications (app, 1);
app->reset_requested = 1;
unlock_app (app);
scd_kick_the_loop ();
gnupg_sleep (1);
}
else
{
ctrl->app_ctx = NULL;
release_application (app);
release_application (app, 0);
}
return err;
@ -454,6 +458,8 @@ deallocate_app (app_t app)
}
xfree (app->serialno);
unlock_app (app);
xfree (app);
}
@ -463,7 +469,7 @@ deallocate_app (app_t app)
actually deferring the deallocation to allow for a later reuse by
a new connection. */
void
release_application (app_t app)
release_application (app_t app, int locked_already)
{
if (!app)
return;
@ -473,12 +479,15 @@ release_application (app_t app)
is using the card - this way the PIN cache and other cached data
are preserved. */
lock_app (app, NULL);
if (!locked_already)
lock_app (app, NULL);
if (!app->ref_count)
log_bug ("trying to release an already released context\n");
--app->ref_count;
unlock_app (app);
if (!locked_already)
unlock_app (app);
}
@ -1019,9 +1028,10 @@ scd_update_reader_status_file (void)
int sw;
unsigned int status;
lock_app (a, NULL);
app_next = a->next;
if (a->ref_count == 0)
if (a->reset_requested)
status = 0;
else
{
@ -1036,6 +1046,7 @@ scd_update_reader_status_file (void)
/* Get status failed. Ignore that. */
if (a->periodical_check_needed)
periodical_check_needed = 1;
unlock_app (a);
continue;
}
}
@ -1056,12 +1067,14 @@ scd_update_reader_status_file (void)
a->card_status = status;
if (a->periodical_check_needed)
periodical_check_needed = 1;
unlock_app (a);
}
}
else
{
if (a->periodical_check_needed)
periodical_check_needed = 1;
unlock_app (a);
}
}
npth_mutex_unlock (&app_list_lock);