[PATCH 1/4] libmultipath: get_udev_uid: make sure pp->wwid is 0-terminated

[bmarzins@redhat.com (Benjamin Marzinski)]

ACK, but I'm fine with Bart's patch as well.

-Ben

On Fri, Jul 14, 2017@01:32:06PM +0200, Martin Wilck wrote:
> If the first WWID_LEN bytes of the uuid_attribute do not contain
> a 0 byte, pp->wwid may end up not properly terminated. Fix it.
> 
> Signed-off-by: Martin Wilck <mwilck at suse.com>
> ---
>  libmultipath/discovery.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/libmultipath/discovery.c b/libmultipath/discovery.c
> index 663c8eaa..9951af84 100644
> --- a/libmultipath/discovery.c
> +++ b/libmultipath/discovery.c
> @@ -1615,6 +1615,7 @@ get_udev_uid(struct path * pp, char *uid_attribute, struct udev_device *udev)
>  			len = strlen(value);
>  		}
>  		strncpy(pp->wwid, value, len);
> +		pp->wwid[WWID_SIZE - 1] = '\0';
>  	} else {
>  		condlog(3, "%s: no %s attribute", pp->dev,
>  			uid_attribute);
> -- 
> 2.13.2