lkml.org 
[lkml]   [2014]   [Jul]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] s390: scsi: zfcp_aux.c: Cleaning up missing null-terminate in conjunction with strncpy
On 07/26/2014 04:36 PM, Rickard Strandqvist wrote:
> Replacing strncpy with strlcpy to avoid strings that lacks null terminate.
>
> Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
> ---
> drivers/s390/scsi/zfcp_aux.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c
> index 8004b07..a23ba76 100644
> --- a/drivers/s390/scsi/zfcp_aux.c
> +++ b/drivers/s390/scsi/zfcp_aux.c
> @@ -101,7 +101,7 @@ static void __init zfcp_init_device_setup(char *devstr)
> token = strsep(&str, ",");
> if (!token || strlen(token) >= ZFCP_BUS_ID_SIZE)
> goto err_out;

Due to the check for strlen(token) >= ZFCP_BUS_ID_SIZE we should be safe
even with strlcpy because we would reject any user string that does not
fit into busid including the trailing zero character.

Since it works either way, we can change it though,

Acked-by: Steffen Maier <maier@linux.vnet.ibm.com>

> - strncpy(busid, token, ZFCP_BUS_ID_SIZE);
> + strlcpy(busid, token, ZFCP_BUS_ID_SIZE);
>
> token = strsep(&str, ",");
> if (!token || kstrtoull(token, 0, (unsigned long long *) &wwpn))
>

--
Mit freundlichen Grüßen / Kind regards
Steffen Maier

Linux on System z Development

IBM Deutschland Research & Development GmbH
Vorsitzende des Aufsichtsrats: Martina Koederitz
Geschaeftsfuehrung: Dirk Wittkopp
Sitz der Gesellschaft: Boeblingen
Registergericht: Amtsgericht Stuttgart, HRB 243294

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2014-07-28 17:01    [W:0.044 / U:1.284 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site