Check for invalid indices in mod/group state API

Signed-off-by: Daniel Stone <daniel@fooishbar.org>

diff --git a/src/state.c b/src/state.c
index d63d4c9..1802f84 100644 (file)
--- a/src/state.c
+++ b/src/state.c
@@ -472,6 +472,9 @@ int xkb_state_mod_index_is_active(struct xkb_state *state,
 {
     int ret = 0;
 
+    if (idx >= xkb_map_num_mods(state->xkb))
+        return -1;
+
     if (type & XKB_STATE_DEPRESSED)
         ret |= (state->base_mods & (1 << idx));
     if (type & XKB_STATE_LATCHED)
@@ -507,6 +510,9 @@ int xkb_state_group_index_is_active(struct xkb_state *state,
 {
     int ret = 0;
 
+    if (idx >= xkb_map_num_groups(state->xkb))
+        return -1;
+
     if (type & XKB_STATE_DEPRESSED)
         ret |= (state->base_group == idx);
     if (type & XKB_STATE_LATCHED)