linux-kernel - Re: [PATCH][next] fs/ntfs3: Fix a memory leak on object opts

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Message-ID: <20210910105018.asvmzihjdqeqm25v@kari-VirtualBox>
Date:   Fri, 10 Sep 2021 13:50:18 +0300
From:   Kari Argillander <kari.argillander@...il.com>
To:     Colin King <colin.king@...onical.com>
Cc:     Konstantin Komarov <almaz.alexandrovich@...agon-software.com>,
        ntfs3@...ts.linux.dev, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] fs/ntfs3: Fix a memory leak on object opts

On Fri, Sep 10, 2021 at 11:02:02AM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> Currently a failed allocation on sbi->upcase will cause an exit via
> the label free_sbi causing a memory leak on object opts. Fix this by
> re-ordering the exit paths free_opts and free_sbi so that kfree's occur
> in the reverse allocation order.
> 
> Addresses-Coverity: ("Resource leak")
> Fixes: 27fac77707a1 ("fs/ntfs3: Init spi more in init_fs_context than fill_super")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---

Thanks Colin.

Reviewed-by: Kari Argillander <kari.argillander@...il.com>

>  fs/ntfs3/super.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c
> index 3cba0b5e7ac7..69f23db0d727 100644
> --- a/fs/ntfs3/super.c
> +++ b/fs/ntfs3/super.c
> @@ -1450,10 +1450,10 @@ static int ntfs_init_fs_context(struct fs_context *fc)
>  	fc->ops = &ntfs_context_ops;
>  
>  	return 0;
> -free_opts:
> -	kfree(opts);
>  free_sbi:
>  	kfree(sbi);
> +free_opts:
> +	kfree(opts);
>  	return -ENOMEM;
>  }
>  
> -- 
> 2.32.0
>