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fb: quiet -Wanalyzer-out-of-bounds warnings in fbOverlayCopyWindow()

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Reported in #1817:

xwayland-24.1.6/redhat-linux-build/../fb/fboverlay.c:230:13:
 warning[-Wanalyzer-out-of-bounds]: stack-based buffer over-read
xwayland-24.1.6/redhat-linux-build/../fb/fboverlay.c:233:9:
 warning[-Wanalyzer-out-of-bounds]: stack-based buffer over-read

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2162>
This commit is contained in:
Alan Coopersmith
2026-03-29 14:24:17 -07:00
committed by Enrico Weigelt, metux IT consult
parent 3b81b8a9b9
commit 8c5dcbbf8a
1 changed files with 2 additions and 0 deletions
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2
fb/fboverlay.c
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@@ -24,6 +24,7 @@
#include <dix-config.h>
#include <assert.h>
#include <stdlib.h>
#include "include/shmint.h"
@@ -210,6 +211,7 @@ fbOverlayCopyWindow(WindowPtr pWin, xPoint ptOldOrg, RegionPtr prgnSrc)
/*
* Compute the portion of each fb affected by this copy
*/
assert(pScrPriv->nlayers <= FB_OVERLAY_MAX);
for (i = 0; i < pScrPriv->nlayers; i++) {
RegionNull(&layerRgn[i]);
RegionIntersect(&layerRgn[i], &rgnDst,