linux-kernel - Re: [PATCH 1/3] fs/ntfs3: Fix memory leak if fill

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Message-ID: <20210927184024.m6jarhnrdrhlwnop@kari-VirtualBox>
Date:   Mon, 27 Sep 2021 21:40:24 +0300
From:   Kari Argillander <kari.argillander@...il.com>
To:     Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
Cc:     ntfs3@...ts.linux.dev, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 1/3] fs/ntfs3: Fix memory leak if fill_super failed

On Mon, Sep 27, 2021 at 06:47:14PM +0300, Konstantin Komarov wrote:
> Restore fc->s_fs_info to free memory allocated in ntfs_init_fs_context.
> 
> Signed-off-by: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
> ---
>  fs/ntfs3/super.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c
> index 800897777eb0..7099d9b1f3aa 100644
> --- a/fs/ntfs3/super.c
> +++ b/fs/ntfs3/super.c
> @@ -1308,6 +1308,9 @@ int ntfs_discard(struct ntfs_sb_info *sbi, CLST lcn, CLST len)
>  	if (err == -EOPNOTSUPP)
>  		sbi->flags |= NTFS_FLAGS_NODISCARD;
>  
> +	/* Restore fc->s_fs_info to free memory allocated in ntfs_init_fs_context. */
> +	fc->s_fs_info = sbi;

Won't build and I do not understand what this does in ntfs_discard.

> +
>  	return err;
>  }
>  
> -- 
> 2.33.0
> 
>