The patch below does not apply to the 3.8-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

>From 3e36a16375eee390a9d80f99499fe630efa08128 Mon Sep 17 00:00:00 2001
From: Wei Yongjun <[email protected]>
Date: Sat, 2 Mar 2013 17:13:55 -0500
Subject: [PATCH] ext4: fix possible memory leak in ext4_remount()

'orig_data' is malloced in ext4_remount() and should be freed
before leaving from the error handling cases, otherwise it will
cause memory leak.

Signed-off-by: Wei Yongjun <[email protected]>
Signed-off-by: "Theodore Ts'o" <[email protected]>
Reviewed-by: Lukas Czerner <[email protected]>
Cc: [email protected]

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 1ae5860..6ac9c8a 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4543,6 +4543,7 @@ static int ext4_remount(struct super_block *sb, int 
*flags, char *data)
                        if (!old_opts.s_qf_names[i]) {
                                for (j = 0; j < i; j++)
                                        kfree(old_opts.s_qf_names[j]);
+                               kfree(orig_data);
                                return -ENOMEM;
                        }
                } else

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