linux-kernel - [PATCH] fs: reiserfs: free new_opts in reiserfs

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Date:   Wed, 27 Oct 2021 11:39:25 +0800
From:   Dongliang Mu <mudongliangabcd@...il.com>
To:     Yu Kuai <yukuai3@...wei.com>,
        Dongliang Mu <mudongliangabcd@...il.com>,
        Jan Kara <jack@...e.cz>, Miklos Szeredi <mszeredi@...hat.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        David Howells <dhowells@...hat.com>
Cc:     reiserfs-devel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] fs: reiserfs: free new_opts in reiserfs_remount

Since the commit c3d98ea08291 ("VFS: Don't use save/replace_mount_options
if not using generic_show_options") eliminates replace_mount_options
in reiserfs, but did not handle the allocated new_opts,
it will cause memory leak in the reiserfs_remount.

Fix this by freeing new_opts in the reiserfs_remount temporarily.

Fixes: c3d98ea08291 ("VFS: Don't use save/replace_mount_options if not using generic_show_options")
Signed-off-by: Dongliang Mu <mudongliangabcd@...il.com>
---
 fs/reiserfs/super.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 58481f8d63d5..b36865c8b66a 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -1594,6 +1594,7 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
 	}
 
 out_ok_unlocked:
+	kfree(new_opts);
 	return 0;
 
 out_err_unlock:
-- 
2.25.1