xorg-x11-server-Xwayland/0007-xwayland-Check-buffer-prior-to-attaching-it.patch
Olivier Fourdan a618d2e780 Backport fixes for GLX and EGLstream
Resolves: rhbz#1969486
2021-06-17 10:52:52 +02:00

89 lines
3.0 KiB
Diff

From 8a07b3e391bbed0b7d8f2ed37928b362eec3beee Mon Sep 17 00:00:00 2001
From: Olivier Fourdan <ofourdan@redhat.com>
Date: Mon, 29 Mar 2021 15:01:15 +0200
Subject: [PATCH xserver 07/27] xwayland: Check buffer prior to attaching it
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
If the buffer is NULL, do not even try to attach it, and risk a Wayland
protocol error which would be fatal to us.
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Reviewed-by: Martin Peres <martin.peres@mupuf.org>
Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>
https://gitlab.freedesktop.org/xorg/xserver/-/issues/1156
(cherry picked from commit 25d2f4948f0abd39e099b8ac69b7cb1dab38a10a)
---
hw/xwayland/xwayland-cursor.c | 11 +++++++++--
hw/xwayland/xwayland-present.c | 7 ++++++-
hw/xwayland/xwayland-window.c | 5 +++++
3 files changed, 20 insertions(+), 3 deletions(-)
diff --git a/hw/xwayland/xwayland-cursor.c b/hw/xwayland/xwayland-cursor.c
index fac8840e6..c4457cc2a 100644
--- a/hw/xwayland/xwayland-cursor.c
+++ b/hw/xwayland/xwayland-cursor.c
@@ -162,8 +162,15 @@ static void
xwl_cursor_attach_pixmap(struct xwl_seat *xwl_seat,
struct xwl_cursor *xwl_cursor, PixmapPtr pixmap)
{
- wl_surface_attach(xwl_cursor->surface,
- xwl_shm_pixmap_get_wl_buffer(pixmap), 0, 0);
+ struct wl_buffer *buffer;
+
+ buffer = xwl_shm_pixmap_get_wl_buffer(pixmap);
+ if (!buffer) {
+ ErrorF("cursor: Error getting buffer\n");
+ return;
+ }
+
+ wl_surface_attach(xwl_cursor->surface, buffer, 0, 0);
xwl_surface_damage(xwl_seat->xwl_screen, xwl_cursor->surface, 0, 0,
xwl_seat->x_cursor->bits->width,
xwl_seat->x_cursor->bits->height);
diff --git a/hw/xwayland/xwayland-present.c b/hw/xwayland/xwayland-present.c
index 7ba7efc11..83d67517a 100644
--- a/hw/xwayland/xwayland-present.c
+++ b/hw/xwayland/xwayland-present.c
@@ -443,6 +443,12 @@ xwl_present_flip(WindowPtr present_window,
if (!xwl_window)
return FALSE;
+ buffer = xwl_glamor_pixmap_get_wl_buffer(pixmap);
+ if (!buffer) {
+ ErrorF("present: Error getting buffer\n");
+ return FALSE;
+ }
+
damage_box = RegionExtents(damage);
event = malloc(sizeof *event);
@@ -450,7 +456,6 @@ xwl_present_flip(WindowPtr present_window,
return FALSE;
pixmap->refcnt++;
- buffer = xwl_glamor_pixmap_get_wl_buffer(pixmap);
event->event_id = event_id;
event->xwl_present_window = xwl_present_window;
diff --git a/hw/xwayland/xwayland-window.c b/hw/xwayland/xwayland-window.c
index d0c7c581d..af4290ec7 100644
--- a/hw/xwayland/xwayland-window.c
+++ b/hw/xwayland/xwayland-window.c
@@ -805,6 +805,11 @@ xwl_window_post_damage(struct xwl_window *xwl_window)
#endif
buffer = xwl_shm_pixmap_get_wl_buffer(pixmap);
+ if (!buffer) {
+ ErrorF("Error getting buffer\n");
+ return;
+ }
+
#ifdef XWL_HAS_GLAMOR
if (xwl_screen->glamor)
xwl_glamor_post_damage(xwl_window, pixmap, region);
--
2.31.1