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Bug 787439 - Segmentation Fault in Transfer dialog after clearing...

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Date field and pressing escape.

gtk_widget_destroy() ran the signals on the dialog controls which
tried to access the XferDialog data, but since gnc_xfer_dialog_close_cb()
had already run that memory had been freed and then used by the std::string
in GncDate::format; later handlers attempting to access the XferData had
garbage pointers to work with, causing a crash.

Running gtk_widget_destroy() first preserves the pointers long enough for
the dialog control callbacks to function without crashing.
This commit is contained in:
John Ralls 2018-03-13 11:28:39 -07:00
parent 2391db37c1
commit c381b2c965
1 changed files with 6 additions and 3 deletions
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9
gnucash/gnome-utils/dialog-transfer.c
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@ -302,7 +302,8 @@ gnc_xfer_dialog_update_price (XferDialog *xferData)
gnc_numeric price_value;
if (!xferData) return;
if (!xferData->from_commodity || ! xferData->to_commodity) return;
if (!GNC_IS_COMMODITY (xferData->from_commodity) ||
!GNC_IS_COMMODITY (xferData->to_commodity)) return;
if (gnc_commodity_equal (xferData->from_commodity, xferData->to_commodity))
return;
if (!xferData->pricedb) return;
@ -1128,6 +1129,7 @@ gnc_xfer_dialog_select_from_currency(XferDialog *xferData, gnc_commodity *cur)
void
gnc_xfer_dialog_select_to_currency(XferDialog *xferData, gnc_commodity *cur)
{
g_return_if_fail (cur && GNC_IS_COMMODITY (cur));
gtk_label_set_text(GTK_LABEL(xferData->to_currency_label),
gnc_commodity_get_printname(cur));
@ -2052,8 +2054,8 @@ close_handler (gpointer user_data)
gnc_save_window_size (GNC_PREFS_GROUP, GTK_WINDOW (dialog));
gtk_widget_hide (dialog);
gnc_xfer_dialog_close_cb(GTK_DIALOG(dialog), xferData);
gtk_widget_destroy (dialog);
gnc_xfer_dialog_close_cb(GTK_DIALOG(dialog), xferData);
g_free (to_info);
to_info = NULL;
g_free (from_info);
@ -2403,7 +2405,8 @@ gboolean gnc_xfer_dialog_run_exchange_dialog(
gnc_commodity *txn_cur = xaccTransGetCurrency(txn);
gnc_commodity *reg_com = xaccAccountGetCommodity(reg_acc);
g_return_val_if_fail(txn_cur, TRUE);
g_return_val_if_fail(txn_cur && GNC_IS_COMMODITY (txn_cur), TRUE);
g_return_val_if_fail(xfer_com && GNC_IS_COMMODITY (xfer_com), TRUE);
if (xaccTransUseTradingAccounts (txn))
{