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data-device: check if there's a source before sending dnd_finish

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This could cause a segfault in data_offer_destroy if the offer has version < 3.
This commit is contained in:
emersion 2019-02-24 09:24:58 +01:00 committed by Drew DeVault
parent 421283935b
commit d425206719
1 changed files with 5 additions and 5 deletions
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10
types/data_device/wlr_data_offer.c
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@ -96,7 +96,7 @@ static void data_offer_handle_receive(struct wl_client *client,
wlr_data_source_send(offer->source, mime_type, fd);
}
static void data_offer_dnd_finish(struct wlr_data_offer *offer) {
static void data_offer_source_dnd_finish(struct wlr_data_offer *offer) {
struct wlr_data_source *source = offer->source;
if (source->actions < 0) {
return;
@ -142,7 +142,7 @@ static void data_offer_handle_finish(struct wl_client *client,
return;
}
data_offer_dnd_finish(offer);
data_offer_source_dnd_finish(offer);
data_offer_destroy(offer);
}
@ -190,14 +190,14 @@ void data_offer_destroy(struct wlr_data_offer *offer) {
wl_list_remove(&offer->source_destroy.link);
wl_list_remove(&offer->link);
if (offer->type == WLR_DATA_OFFER_DRAG) {
if (offer->type == WLR_DATA_OFFER_DRAG && offer->source) {
// If the drag destination has version < 3, wl_data_offer.finish
// won't be called, so do this here as a safety net, because
// we still want the version >= 3 drag source to be happy.
if (wl_resource_get_version(offer->resource) <
WL_DATA_OFFER_ACTION_SINCE_VERSION) {
data_offer_dnd_finish(offer);
} else if (offer->source && offer->source->impl->dnd_finish) {
data_offer_source_dnd_finish(offer);
} else if (offer->source->impl->dnd_finish) {
wlr_data_source_destroy(offer->source);
}
}