linux-kernel - Re: [PATCH v4] Staging: exfat: avoid use of strcpy

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Message-ID: <20190911190355.GA18977@kadam>
Date:   Wed, 11 Sep 2019 22:03:55 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Sandro Volery <sandro@...ery.com>
Cc:     valdis.kletnieks@...edu, gregkh@...uxfoundation.org,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        linux@...musvillemoes.dk
Subject: Re: [PATCH v4] Staging: exfat: avoid use of strcpy

On Wed, Sep 11, 2019 at 09:53:03PM +0200, Sandro Volery wrote:
> diff --git a/drivers/staging/exfat/exfat_core.c b/drivers/staging/exfat/exfat_core.c
> index da8c58149c35..4336fee444ce 100644
> --- a/drivers/staging/exfat/exfat_core.c
> +++ b/drivers/staging/exfat/exfat_core.c
> @@ -2960,18 +2960,15 @@ s32 resolve_path(struct inode *inode, char *path, struct chain_t *p_dir,
>  	struct super_block *sb = inode->i_sb;
>  	struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
>  	struct file_id_t *fid = &(EXFAT_I(inode)->fid);
> -
> -	if (strlen(path) >= (MAX_NAME_LENGTH * MAX_CHARSET_SIZE))
> +	

You have added a tab here.

> +	if (strscpy(name_buf, path, sizeof(name_buf)) < 0)
>  		return FFS_INVALIDPATH;
>  
> -	strcpy(name_buf, path);
> -
>  	nls_cstring_to_uniname(sb, p_uniname, name_buf, &lossy);
>  	if (lossy)
>  		return FFS_INVALIDPATH;
>  
> -	fid->size = i_size_read(inode);
> -
> +fid->size = i_size_read(inode);

And you accidentally deleted some white space here.

I use vim, so I have it configured to highlight whitespace at the end of
a line.  I don't remember how it's done now but I googled it for you.
https://vim.fandom.com/wiki/Highlight_unwanted_spaces

regards,
dan carpenter