From 811429bfd4a46f33c7788580f72038b0c3c1c2b1 Mon Sep 17 00:00:00 2001
From: Jan Beich <jbeich@FreeBSD.org>
Date: Mon, 10 Jun 2024 20:31:03 +0000
Subject: wayland: consistently check mmap error after 6967a3145044 (#6402)

mmap() returns MAP_FAILED on error, not nullptr.
---
 src/protocols/LinuxDMABUF.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/protocols/LinuxDMABUF.cpp')

diff --git a/src/protocols/LinuxDMABUF.cpp b/src/protocols/LinuxDMABUF.cpp
index f7911f6e..cf8f8730 100644
--- a/src/protocols/LinuxDMABUF.cpp
+++ b/src/protocols/LinuxDMABUF.cpp
@@ -38,7 +38,7 @@ CCompiledDMABUFFeedback::CCompiledDMABUFFeedback(dev_t device, std::vector<SDMAB
 
     auto arr = (SDMABUFFeedbackTableEntry*)mmap(nullptr, tableLen, PROT_READ | PROT_WRITE, MAP_SHARED, fds[0], 0);
 
-    if (!arr) {
+    if (arr == MAP_FAILED) {
         LOGM(ERR, "mmap failed");
         close(fds[0]);
         close(fds[1]);
-- 
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