File util-dont-leak-a-file-descriptor-in-read_file.patch of Package dmidecode.28672

From: Jean Delvare <jdelvare@suse.de>
Date: Tue, 11 Apr 2017 11:41:38 +0200
Subject: util: Don't leak a file descriptor in read_file
Git-commit: 6953b627a0f11f70662496a77b67aefa9dc40968
Patch-mainline: 3.1

If memory allocation fails, we should close the file descriptor
before returning the error.

Also remove unneeded parentheses on return, return isn't a function.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Fixes: 2339e722b49e ("util: Add read_file() function for reading sysfs files")
---
 util.c |   11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

--- a/util.c
+++ b/util.c
@@ -113,13 +113,13 @@ void *read_file(size_t *max_len, const c
 	{
 		if (errno != ENOENT)
 			perror(filename);
-		return(NULL);
+		return NULL;
 	}
 
 	if ((p = malloc(*max_len)) == NULL)
 	{
 		perror("malloc");
-		return NULL;
+		goto out;
 	}
 
 	do
@@ -129,10 +129,10 @@ void *read_file(size_t *max_len, const c
 		{
 			if (errno != EINTR)
 			{
-				close(fd);
 				perror(filename);
 				free(p);
-				return NULL;
+				p = NULL;
+				goto out;
 			}
 		}
 		else
@@ -140,8 +140,9 @@ void *read_file(size_t *max_len, const c
 	}
 	while (r != 0);
 
-	close(fd);
 	*max_len = r2;
+out:
+	close(fd);
 
 	return p;
 }