From 688efad6e96d755188cb08fbe9e16822e1cfa3f1 Mon Sep 17 00:00:00 2001
From: Brad Smith <brad@comstyle.com>
Date: Thu, 1 Oct 2026 14:55:32 -0400
Subject: [PATCH] CPU: Check elf_aux_info return value in x265_getauxval

elf_aux_info() returns an errno value (0 on success) rather than -1
with errno set. Check the result and return 0 ("no features
reported") on failure instead of silently ignoring the error.
---
 source/common/cpu.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/source/common/cpu.cpp b/source/common/cpu.cpp
index 3022ae44e..4f29481b6 100644
--- a/source/common/cpu.cpp
+++ b/source/common/cpu.cpp
@@ -148,8 +148,9 @@ unsigned long x265_getauxval(unsigned long type)
 #if HAVE_GETAUXVAL
     return getauxval(type);
 #elif HAVE_ELF_AUX_INFO
-    unsigned long aux = 0;
-    elf_aux_info(type, &aux, sizeof(aux));
+    unsigned long aux;
+    if (elf_aux_info(type, &aux, sizeof(aux)) != 0)
+        aux = 0;
     return aux;
 #else
     (void)type;