From: wuguanghao <wuguanghao3@huawei.com>
Date: Wed, 30 Jun 2021 08:27:15 +0000 (+0800)
Subject: zap_sector: fix memory leak
X-Git-Tag: v1.46.3~21
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c3215a532441a9a397d1b12c63827e8f7233938b;p=thirdparty%2Fe2fsprogs.git

zap_sector: fix memory leak

In zap_sector(), need free buf before return,
otherwise it will cause memory leak.

Signed-off-by: Wu Guanghao <wuguanghao3@huawei.com>
Signed-off-by: Zhiqiang Liu <liuzhiqiang26@huawei.com>
Reviewed-by: Wu Bo <wubo40@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---

diff --git a/misc/mke2fs.c b/misc/mke2fs.c
index 54aa340a4..9fa6eaa73 100644
--- a/misc/mke2fs.c
+++ b/misc/mke2fs.c
@@ -585,8 +585,10 @@ static void zap_sector(ext2_filsys fs, int sect, int nsect)
 		else {
 			magic = (unsigned int *) (buf + BSD_LABEL_OFFSET);
 			if ((*magic == BSD_DISKMAGIC) ||
-			    (*magic == BSD_MAGICDISK))
+			    (*magic == BSD_MAGICDISK)) {
+				free(buf);
 				return;
+			}
 		}
 	}