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drm backend: overflow fixes
These operations are done in 32-bit arithmetics before being casted to 64-bit, thus can overflow before the cast. Casting early fixes the issue. Found through static analysis
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63eb720871
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2 changed files with 3 additions and 3 deletions
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@ -83,8 +83,8 @@ static void set_plane_props(struct atomic *atom, struct wlr_drm_plane *plane,
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// The src_* properties are in 16.16 fixed point
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atomic_add(atom, id, props->src_x, 0);
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atomic_add(atom, id, props->src_y, 0);
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atomic_add(atom, id, props->src_w, plane->surf.width << 16);
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atomic_add(atom, id, props->src_h, plane->surf.height << 16);
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atomic_add(atom, id, props->src_w, (uint64_t)plane->surf.width << 16);
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atomic_add(atom, id, props->src_h, (uint64_t)plane->surf.height << 16);
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atomic_add(atom, id, props->crtc_w, plane->surf.width);
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atomic_add(atom, id, props->crtc_h, plane->surf.height);
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atomic_add(atom, id, props->fb_id, fb_id);
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@ -973,7 +973,7 @@ int handle_drm_event(int fd, uint32_t mask, void *data) {
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}
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void restore_drm_outputs(struct wlr_drm_backend *drm) {
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uint64_t to_close = (1 << wl_list_length(&drm->outputs)) - 1;
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uint64_t to_close = (1L << wl_list_length(&drm->outputs)) - 1;
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struct wlr_drm_connector *conn;
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wl_list_for_each(conn, &drm->outputs, link) {
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