linux-kernel - Re: [PATCH] ecryptfs: fix a memory leak bug

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Message-ID: <20190820071131.GB22824@elm>
Date:   Tue, 20 Aug 2019 00:11:32 -0700
From:   Tyler Hicks <tyhicks@...onical.com>
To:     Wenwen Wang <wenwen@...uga.edu>
Cc:     "open list:ECRYPT FILE SYSTEM" <ecryptfs@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ecryptfs: fix a memory leak bug

On 2019-08-20 00:33:54, Wenwen Wang wrote:
> In ecryptfs_init_messaging(), if the allocation for 'ecryptfs_msg_ctx_arr'
> fails, the previously allocated 'ecryptfs_daemon_hash' is not deallocated,
> leading to a memory leak bug. To fix this issue, free
> 'ecryptfs_daemon_hash' before returning the error.
> 
> Signed-off-by: Wenwen Wang <wenwen@...uga.edu>

Thanks for the patch!

I added the following tags to the commit message:

 Cc: stable@...r.kernel.org
 Fixes: 88b4a07e6610 ("[PATCH] eCryptfs: Public key transport mechanism")

I also added the function name to the commit subject so that it was
unique from your other fix.

I've pushed the fix to the eCryptfs next branch and I'll submit a pull
request for inclusion soon.

Tyler

> ---
>  fs/ecryptfs/messaging.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/fs/ecryptfs/messaging.c b/fs/ecryptfs/messaging.c
> index d668e60..c05ca39 100644
> --- a/fs/ecryptfs/messaging.c
> +++ b/fs/ecryptfs/messaging.c
> @@ -379,6 +379,7 @@ int __init ecryptfs_init_messaging(void)
>  					* ecryptfs_message_buf_len),
>  				       GFP_KERNEL);
>  	if (!ecryptfs_msg_ctx_arr) {
> +		kfree(ecryptfs_daemon_hash);
>  		rc = -ENOMEM;
>  		goto out;
>  	}
> -- 
> 2.7.4
>