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Xext/xtest: avoid null dereference in ProcXTestFakeInput()

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Reported in #1817:

xwayland-24.1.6/redhat-linux-build/../Xext/xtest.c:383:14: warning[-Wanalyzer-null-dereference]: dereference of NULL ‘dev’
xwayland-24.1.6/redhat-linux-build/../Xext/xtest.c:348:9: release_memory: ‘dev’ is NULL
xwayland-24.1.6/redhat-linux-build/../Xext/xtest.c:383:14: danger: dereference of NULL ‘dev’

xwayland-24.1.6/redhat-linux-build/../Xext/xtest.c:395:14: warning[-Wanalyzer-null-dereference]: dereference of NULL ‘dev’
xwayland-24.1.6/redhat-linux-build/../Xext/xtest.c:348:9: release_memory: ‘dev’ is NULL
xwayland-24.1.6/redhat-linux-build/../Xext/xtest.c:395:14: danger: dereference of NULL ‘dev’

xwayland-24.1.6/redhat-linux-build/../Xext/xtest.c:426:14: warning[-Wanalyzer-null-dereference]: dereference of NULL ‘dev’
xwayland-24.1.6/redhat-linux-build/../Xext
/xtest.c:348:9: release_memory: ‘dev’ is NULL
xwayland-24.1.6/redhat-linux-build/../Xext/xtest.c:426:14: danger: dereference of NULL ‘dev’

xwayland-24.1.6/redhat-linux-build/../Xext/xtest.c:440:9: warning[-Wanalyzer-null-dereference]: dereference of NULL ‘dev’
xwayland-24.1.6/redhat-linux-build/../Xext/xtest.c:348:9: release_memory: ‘dev’ is NULL
xwayland-24.1.6/redhat-linux-build/../Xext/xtest.c:440:9: danger: dereference of NULL ‘dev’

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
(cherry picked from commit 04ef51dae6)

Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2076>
This commit is contained in:
Alan Coopersmith 2025-10-04 17:38:32 -07:00 • committed by Olivier Fourdan
parent 5b2933abf0
commit c8682eae7b
1 changed files with 4 additions and 0 deletions
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4
Xext/xtest.c
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@ -346,6 +346,10 @@ ProcXTestFakeInput(ClientPtr client)
return BadAccess;
dev = GetXTestDevice(dev);
/* This can only happen if we passed a slave to GetXTestDevice() */
if (!dev)
return BadAccess;
}