From 0ee603905387e00a2e3d83ead1de99ca61d641fb Mon Sep 17 00:00:00 2001
From: Alan Coopersmith <alan.coopersmith@oracle.com>
Date: Sun, 5 Oct 2025 17:52:39 -0700
Subject: [PATCH] Xi: handle allocation failure in add_master_func()
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Reported in #1817:

xwayland-24.1.6/redhat-linux-build/../Xi/xibarriers.c:729:5:
 warning[-Wanalyzer-null-dereference]:
 dereference of NULL ‘AllocBarrierDevice()’

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2075>
---
 Xi/xibarriers.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Xi/xibarriers.c b/Xi/xibarriers.c
index b7c3393d4..bca99b3d3 100644
--- a/Xi/xibarriers.c
+++ b/Xi/xibarriers.c
@@ -727,6 +727,8 @@ static void add_master_func(void *res, XID id, void *devid)
 
 
     pbd = AllocBarrierDevice();
+    if (!pbd)
+        return;
     pbd->deviceid = *deviceid;
 
     input_lock();