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

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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
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@ -200,7 +200,8 @@ void arrange_layers(struct sway_output *output) {
for (size_t i = 0; i < nlayers; ++i) { for (size_t i = 0; i < nlayers; ++i) {
wl_list_for_each_reverse(layer, wl_list_for_each_reverse(layer,
&output->layers[layers_above_shell[i]], link) { &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; topmost = layer;
break; 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) { } else if (!layer || seat->focused_layer == layer) {
return; return;
} }
assert(layer->mapped);
seat_set_focus_surface(seat, layer->surface, true); seat_set_focus_surface(seat, layer->surface, true);
if (layer->layer >= ZWLR_LAYER_SHELL_V1_LAYER_TOP) { if (layer->layer >= ZWLR_LAYER_SHELL_V1_LAYER_TOP) {
seat->focused_layer = layer; seat->focused_layer = layer;