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https://github.com/hyprwm/wlroots-hyprland.git
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screencopy: fix segfault on disabled output
Disconnecting or disabling an output between capture_output() and ready() could cause either a NULL dereference or an incorrect attach_render_locks count.
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parent
ca45f4490c
commit
ce3e413e83
1 changed files with 32 additions and 20 deletions
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@ -23,9 +23,11 @@ static void frame_destroy(struct wlr_screencopy_frame_v1 *frame) {
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if (frame == NULL) {
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return;
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}
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wlr_output_lock_attach_render(frame->output, false);
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if (frame->cursor_locked) {
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wlr_output_lock_software_cursors(frame->output, false);
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if (frame->output != NULL && frame->buffer != NULL) {
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wlr_output_lock_attach_render(frame->output, false);
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if (frame->cursor_locked) {
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wlr_output_lock_software_cursors(frame->output, false);
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}
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}
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wl_list_remove(&frame->link);
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wl_list_remove(&frame->output_precommit.link);
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@ -104,6 +106,12 @@ static void frame_handle_copy(struct wl_client *client,
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struct wlr_output *output = frame->output;
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if (!output->enabled) {
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zwlr_screencopy_frame_v1_send_failed(frame->resource);
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frame_destroy(frame);
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return;
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}
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struct wl_shm_buffer *buffer = wl_shm_buffer_get(buffer_resource);
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if (buffer == NULL) {
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wl_resource_post_error(frame->resource,
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@ -180,23 +188,6 @@ static void capture_output(struct wl_client *client,
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struct wlr_screencopy_manager_v1 *manager, uint32_t version, uint32_t id,
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int32_t overlay_cursor, struct wlr_output *output,
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const struct wlr_box *box) {
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struct wlr_box buffer_box = {0};
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if (box == NULL) {
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buffer_box.width = output->width;
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buffer_box.height = output->height;
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} else {
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int ow, oh;
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wlr_output_effective_resolution(output, &ow, &oh);
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buffer_box = *box;
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wlr_box_transform(&buffer_box, &buffer_box, output->transform, ow, oh);
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buffer_box.x *= output->scale;
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buffer_box.y *= output->scale;
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buffer_box.width *= output->scale;
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buffer_box.height *= output->scale;
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}
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struct wlr_screencopy_frame_v1 *frame =
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calloc(1, sizeof(struct wlr_screencopy_frame_v1));
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if (frame == NULL) {
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@ -222,6 +213,10 @@ static void capture_output(struct wl_client *client,
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wl_list_init(&frame->output_precommit.link);
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wl_list_init(&frame->buffer_destroy.link);
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if (output == NULL || !output->enabled) {
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goto error;
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}
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struct wlr_renderer *renderer = wlr_backend_get_renderer(output->backend);
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assert(renderer);
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@ -231,6 +226,23 @@ static void capture_output(struct wl_client *client,
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goto error;
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}
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struct wlr_box buffer_box = {0};
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if (box == NULL) {
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buffer_box.width = output->width;
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buffer_box.height = output->height;
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} else {
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int ow, oh;
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wlr_output_effective_resolution(output, &ow, &oh);
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buffer_box = *box;
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wlr_box_transform(&buffer_box, &buffer_box, output->transform, ow, oh);
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buffer_box.x *= output->scale;
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buffer_box.y *= output->scale;
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buffer_box.width *= output->scale;
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buffer_box.height *= output->scale;
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}
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frame->box = buffer_box;
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frame->stride = 4 * buffer_box.width; // TODO: depends on read format
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