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Fix use-after-free when destroying selection sources

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This commit is contained in:
emersion 2017-12-25 18:18:26 +01:00
parent cdc21cdcff
commit 4a11609b76
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GPG key ID: 0FDE7BE0E88F5E48
5 changed files with 37 additions and 19 deletions
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2
include/wlr/types/wlr_data_device.h
View file

@ -126,4 +126,6 @@ void wlr_seat_set_selection(struct wlr_seat *seat,
void wlr_data_source_init(struct wlr_data_source *source);
void wlr_data_source_finish(struct wlr_data_source *source);
#endif

2
include/wlr/types/wlr_primary_selection.h
View file

@ -52,5 +52,7 @@ void wlr_seat_set_primary_selection(struct wlr_seat *seat,
void wlr_primary_selection_source_init(
struct wlr_primary_selection_source *source);
void wlr_primary_selection_source_finish(
struct wlr_primary_selection_source *source);
#endif

25
types/wlr_data_device.c
View file

@ -856,16 +856,7 @@ void data_device_manager_get_data_device(struct wl_client *client,
static void data_source_resource_destroy(struct wl_resource *resource) {
struct wlr_data_source *source =
wl_resource_get_user_data(resource);
char **p;
wl_signal_emit(&source->events.destroy, source);
wl_array_for_each(p, &source->mime_types) {
free(*p);
}
wl_array_release(&source->mime_types);
wlr_data_source_finish(source);
free(source);
}
@ -932,6 +923,20 @@ void wlr_data_source_init(struct wlr_data_source *source) {
wl_signal_init(&source->events.destroy);
}
void wlr_data_source_finish(struct wlr_data_source *source) {
if (source == NULL) {
return;
}
wl_signal_emit(&source->events.destroy, source);
char **p;
wl_array_for_each(p, &source->mime_types) {
free(*p);
}
wl_array_release(&source->mime_types);
}
static void data_device_manager_create_data_source(struct wl_client *client,
struct wl_resource *resource, uint32_t id) {
struct wlr_data_source *source = calloc(1, sizeof(struct wlr_data_source));

25
types/wlr_primary_selection.c
View file

@ -144,15 +144,7 @@ static const struct gtk_primary_selection_source_interface source_impl = {
static void source_resource_handle_destroy(struct wl_resource *resource) {
struct wlr_primary_selection_source *source =
wl_resource_get_user_data(resource);
wl_signal_emit(&source->events.destroy, source);
char **p;
wl_array_for_each(p, &source->mime_types) {
free(*p);
}
wl_array_release(&source->mime_types);
wlr_primary_selection_source_finish(source);
free(source);
}
@ -268,6 +260,21 @@ void wlr_primary_selection_source_init(
wl_signal_init(&source->events.destroy);
}
void wlr_primary_selection_source_finish(
struct wlr_primary_selection_source *source) {
if (source == NULL) {
return;
}
wl_signal_emit(&source->events.destroy, source);
char **p;
wl_array_for_each(p, &source->mime_types) {
free(*p);
}
wl_array_release(&source->mime_types);
}
static void device_manager_handle_create_source(struct wl_client *client,
struct wl_resource *manager_resource, uint32_t id) {
struct wlr_primary_selection_source *source =

2
xwayland/selection.c
View file

@ -508,6 +508,7 @@ static void data_source_send(struct wlr_data_source *base,
static void data_source_cancel(struct wlr_data_source *base) {
struct x11_data_source *source = (struct x11_data_source *)base;
wlr_data_source_finish(&source->base);
wl_array_release(&source->mime_types_atoms);
free(source);
}
@ -533,6 +534,7 @@ static void primary_selection_source_cancel(
struct wlr_primary_selection_source *base) {
struct x11_primary_selection_source *source =
(struct x11_primary_selection_source *)base;
wlr_primary_selection_source_finish(&source->base);
wl_array_release(&source->mime_types_atoms);
free(source);
}