linux-ext4 - [PATCH] ext4: fix possible memory leak in ext4

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Message-ID: <CAPgLHd-J=j=aVCpjutq2B1+NMqxz=v50xNcEQA_57Ni_7v9HKA@mail.gmail.com>
Date:	Wed, 27 Feb 2013 13:18:53 +0800
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	tytso@....edu, adilger.kernel@...ger.ca
Cc:	yongjun_wei@...ndmicro.com.cn, linux-ext4@...r.kernel.org
Subject: [PATCH] ext4: fix possible memory leak in ext4_remount()

From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

'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 <yongjun_wei@...ndmicro.com.cn>
---
 fs/ext4/super.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 373d46c..8ae09e3 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4538,6 +4538,7 @@ 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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