linux-kernel - [PATCH] ramfs: Fix memory leak on ramfs_fill

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Date:	Thu, 14 Nov 2013 14:59:19 +0800
From:	Axel Lin <axel.lin@...ics.com>
To:	Al Viro <viro@...iv.linux.org.uk>
Cc:	Rob Landley <rob@...dley.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] ramfs: Fix memory leak on ramfs_fill_super error paths

The memory leak was introduced by commit 318ceed0884
"tidy up after d_make_root() conversion".

Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
 fs/ramfs/inode.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index 39d1465..868a41e 100644
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -221,7 +221,7 @@ int ramfs_fill_super(struct super_block *sb, void *data, int silent)
 
 	err = ramfs_parse_options(data, &fsi->mount_opts);
 	if (err)
-		return err;
+		goto fail;
 
 	sb->s_maxbytes		= MAX_LFS_FILESIZE;
 	sb->s_blocksize		= PAGE_CACHE_SIZE;
@@ -232,10 +232,16 @@ int ramfs_fill_super(struct super_block *sb, void *data, int silent)
 
 	inode = ramfs_get_inode(sb, NULL, S_IFDIR | fsi->mount_opts.mode, 0);
 	sb->s_root = d_make_root(inode);
-	if (!sb->s_root)
-		return -ENOMEM;
+	if (!sb->s_root) {
+		err = -ENOMEM;
+		goto fail;
+	}
 
 	return 0;
+fail:
+	kfree(fsi);
+	sb->s_fs_info = NULL;
+	return err;
 }
 
 struct dentry *ramfs_mount(struct file_system_type *fs_type,
-- 
1.8.1.2



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