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gtk-primary-selection: basic serial validation

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emersion 2018-12-09 12:38:35 +01:00
parent 3699496256
commit 8c573bc7c6
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2 changed files with 10 additions and 1 deletions
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1
include/wlr/types/wlr_gtk_primary_selection.h
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@ -36,6 +36,7 @@ struct wlr_gtk_primary_selection_device {
struct wl_list resources; // wl_resource_get_link struct wl_list resources; // wl_resource_get_link
struct wl_list offers; // wl_resource_get_link struct wl_list offers; // wl_resource_get_link
uint32_t selection_serial;
struct wl_listener seat_destroy; struct wl_listener seat_destroy;
struct wl_listener seat_focus_change; struct wl_listener seat_focus_change;

10
types/wlr_gtk_primary_selection.c
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@ -1,5 +1,6 @@
#define _POSIX_C_SOURCE 200809L #define _POSIX_C_SOURCE 200809L
#include <assert.h> #include <assert.h>
#include <inttypes.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <unistd.h> #include <unistd.h>
@ -202,7 +203,14 @@ static void device_handle_set_selection(struct wl_client *client,
source = &client_source->source; source = &client_source->source;
} }
// TODO: serial checking // TODO: improve serial validation
if (device->seat->primary_selection_source != NULL &&
device->selection_serial - serial < UINT32_MAX / 2) {
wlr_log(WLR_DEBUG, "Rejecting set_selection request, invalid serial "
"(%"PRIu32" <= %"PRIu32")", serial, device->selection_serial);
return;
}
device->selection_serial = serial;
wlr_seat_set_primary_selection(device->seat, source); wlr_seat_set_primary_selection(device->seat, source);
} }