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Check xdg_surface's role before using its toplevel

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Don't access xdg_surface->toplevel if xdg_surface->role is equal to
WLR_XDG_SURFACE_ROLE_NONE, since this could lead to crash. The same
checks are added for xdg_surface_v6.

Fixes #3311
This commit is contained in:
mwenzkowski 2018-12-21 23:25:07 +01:00 • committed by emersion
parent 6b8bf10941
commit 7c27d73b02
3 changed files with 5 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

2
sway/desktop/xdg_shell.c
View file

@ -216,7 +216,7 @@ static bool is_transient_for(struct sway_view *child,
return false;
}
struct wlr_xdg_surface *surface = child->wlr_xdg_surface;
while (surface) {
while (surface && surface->role == WLR_XDG_SURFACE_ROLE_TOPLEVEL) {
if (surface->toplevel->parent == ancestor->wlr_xdg_surface) {
return true;
}

2
sway/desktop/xdg_shell_v6.c
View file

@ -213,7 +213,7 @@ static bool is_transient_for(struct sway_view *child,
return false;
}
struct wlr_xdg_surface_v6 *surface = child->wlr_xdg_surface_v6;
while (surface) {
while (surface && surface->role == WLR_XDG_SURFACE_V6_ROLE_TOPLEVEL) {
if (surface->toplevel->parent == ancestor->wlr_xdg_surface_v6) {
return true;
}

5
sway/tree/container.c
View file

@ -341,7 +341,7 @@ static bool surface_is_popup(struct wlr_surface *surface) {
if (wlr_surface_is_xdg_surface(surface)) {
struct wlr_xdg_surface *xdg_surface =
wlr_xdg_surface_from_wlr_surface(surface);
while (xdg_surface) {
while (xdg_surface && xdg_surface->role != WLR_XDG_SURFACE_ROLE_NONE) {
if (xdg_surface->role == WLR_XDG_SURFACE_ROLE_POPUP) {
return true;
}
@ -353,7 +353,8 @@ static bool surface_is_popup(struct wlr_surface *surface) {
if (wlr_surface_is_xdg_surface_v6(surface)) {
struct wlr_xdg_surface_v6 *xdg_surface_v6 =
wlr_xdg_surface_v6_from_wlr_surface(surface);
while (xdg_surface_v6) {
while (xdg_surface_v6 &&
xdg_surface_v6->role != WLR_XDG_SURFACE_V6_ROLE_NONE) {
if (xdg_surface_v6->role == WLR_XDG_SURFACE_V6_ROLE_POPUP) {
return true;
}