[PATCH 1/3] xfs_fsr: ensure the line we read from leftofffile is null terminated

[Brian Foster]

On Fri, Jun 06, 2014 at 04:03:10PM -0500, Eric Sandeen wrote:
> Ensure that the string we read from leftofffile is NULL
> terminated; the buffer gets passed to strchr(), so
> it's important that we ensure it ends with NULL.
> 
> Signed-off-by: Eric Sandeen <sandeen at redhat.com>
> ---
> 
> diff --git a/fsr/xfs_fsr.c b/fsr/xfs_fsr.c
> index 3818f02..94d235c 100644
> --- a/fsr/xfs_fsr.c
> +++ b/fsr/xfs_fsr.c
> @@ -554,6 +554,8 @@ fsrallfs(char *mtab, int howlong, char *leftofffile)
>  			fsrprintf(_("could not read %s, starting with %s\n"),
>  				leftofffile, *fs->dev);
>  		} else {
> +			/* Ensure the buffer we read is null terminated */
> +			buf[SMBUFSZ-1] = '\0';

Maybe just initialize the buffer..?

Brian

>  			for (fs = fsbase; fs < fsend; fs++) {
>  				fsname = fs->dev;
>  				if ((strncmp(buf,fsname,strlen(fsname)) == 0)
> 
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