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layer-shell: don't give focus to unmapped layer surfaces 

Focused layers are not cleared when destroyed, they are cleared on unmap.
Giving focus to an unmapped layer surface is (1) incorrect and (2) triggers a
use-after-free.

Closes: https://github.com/swaywm/sway/issues/4517
This commit is contained in:
Simon Ser 2019-08-31 23:19:47 +03:00 committed by Drew DeVault
parent b2ee5bc05d
commit 53e01bf5c7
2 changed files with 3 additions and 1 deletions
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3
sway/desktop/layer_shell.c
View File

@ -200,7 +200,8 @@ void arrange_layers(struct sway_output *output) {
for (size_t i = 0; i < nlayers; ++i) {
wl_list_for_each_reverse(layer,
&output->layers[layers_above_shell[i]], link) {
if (layer->layer_surface->current.keyboard_interactive) {
if (layer->layer_surface->current.keyboard_interactive &&
layer->layer_surface->mapped) {
topmost = layer;
break;
}

1
sway/input/seat.c
View File

@ -1095,6 +1095,7 @@ void seat_set_focus_layer(struct sway_seat *seat,
} else if (!layer || seat->focused_layer == layer) {
return;
}
assert(layer->mapped);
seat_set_focus_surface(seat, layer->surface, true);
if (layer->layer >= ZWLR_LAYER_SHELL_V1_LAYER_TOP) {
seat->focused_layer = layer;