From f618965eb719182c66cba456ad93dd4ec39d6fd0 Mon Sep 17 00:00:00 2001
From: matt335672 <30179339+matt335672@users.noreply.github.com>
Date: Mon, 10 Mar 2025 14:28:24 +0000
Subject: [PATCH] Fix coverity warning concerning unchecked return

Coverity insists the return value from read() is unchecked. This seems
to not be true to me, but adding a complete sanity check seems to fix
it.
---
 common/os_calls.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/common/os_calls.c b/common/os_calls.c
index 15ee6a67..ac12cff8 100644
--- a/common/os_calls.c
+++ b/common/os_calls.c
@@ -4294,7 +4294,8 @@ g_fips_mode_enabled(void)
 
     if (fd >= 0)
     {
-        if (read(fd, buff, sizeof(buff)) > 0)
+        ssize_t res = read(fd, buff, sizeof(buff));
+        if (res > 0 && (size_t)res < sizeof(buff))
         {
             rv = (buff[0] != '0');
         }