diff --git a/0002-Prevent-environment-variables-from-exceeding-NAME_MA.patch b/0002-Prevent-environment-variables-from-exceeding-NAME_MA.patch
new file mode 100644
index 0000000000000000000000000000000000000000..ca210c0f281592f8aa3a8b091fed20ea3348a9ee
--- /dev/null
+++ b/0002-Prevent-environment-variables-from-exceeding-NAME_MA.patch
@@ -0,0 +1,30 @@
+From 4673c2eaba443678c4dc6ae74ea16a489b415fed Mon Sep 17 00:00:00 2001
+From: liyunfei <liyunfei33@huawei.com>
+Date: Tue, 19 Sep 2023 09:31:43 +0800
+Subject: [PATCH] Prevent environment variables from exceeding NAME_MAX
+
+---
+ llvm/lib/Support/Unix/Path.inc | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/llvm/lib/Support/Unix/Path.inc b/llvm/lib/Support/Unix/Path.inc
+index 2ae7c6dc..f13f3165 100644
+--- a/llvm/lib/Support/Unix/Path.inc
++++ b/llvm/lib/Support/Unix/Path.inc
+@@ -1427,8 +1427,12 @@ static const char *getEnvTempDir() {
+   // variable.
+   const char *EnvironmentVariables[] = {"TMPDIR", "TMP", "TEMP", "TEMPDIR"};
+   for (const char *Env : EnvironmentVariables) {
+-    if (const char *Dir = std::getenv(Env))
++    if (const char *Dir = std::getenv(Env)) {
++      if(std::strlen(Dir) > NAME_MAX) {
++        continue;
++      }
+       return Dir;
++    }
+   }
+ 
+   return nullptr;
+-- 
+2.28.0.windows.1
+
diff --git a/llvm.spec b/llvm.spec
index 3c8979b56fea05ba719b383d47b9d92af84c9e17..9ae49a409c429f958b3ef05012980950e0526957 100644
--- a/llvm.spec
+++ b/llvm.spec
@@ -35,7 +35,7 @@
 
 Name:		%{pkg_name}
 Version:	%{maj_ver}.%{min_ver}.%{patch_ver}
-Release:	5
+Release:	6
 Summary:	The Low Level Virtual Machine
 
 License:	NCSA
@@ -44,6 +44,7 @@ Source0:	https://github.com/llvm/llvm-project/releases/download/llvmorg-%{versio
 Source1:	https://github.com/llvm/llvm-project/releases/download/llvmorg-%{version}/cmake-%{version}.src.tar.xz
 
 Patch1:		0001-Backport-RISCV-Handle-o-inline-asm-memory-constraint.patch
+Patch2:		0002-Prevent-environment-variables-from-exceeding-NAME_MA.patch
 
 BuildRequires:	binutils-devel
 BuildRequires:	cmake
@@ -293,6 +294,9 @@ LD_LIBRARY_PATH=%{buildroot}/%{install_libdir}  %{__ninja} check-all -C ./_build
 %{install_libdir}/libLLVMTestingSupport.a
 
 %changelog
+* Tue Sep 19 2023 liyunfei <liyunfei33@huawei.com> - 15.0.7-6
+- Prevent environment variables from exceeding NAME_MAX.
+
 * Wed Aug 9 2023 liyunfei <liyunfei33@huawei.com> - 15.0.7-5
 - Solve opaque pointer issue in Backport testcase.