linux-kernel - RE: [PATCH 1/1] bfa: Fixes for 0-terminated strncpy and possible null pointer dereference

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Date:	Thu, 23 May 2013 06:09:42 -0600
From:	Vijay Mohan Guvva <vmohan@...cade.com>
To:	Jakob Normark <jakobnormark@...il.com>,
	Anil Gurumurthy <agurumur@...cade.com>,
	"James E.J. Bottomley" <JBottomley@...allels.com>
CC:	"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/1] bfa: Fixes for 0-terminated strncpy and possible
 null pointer dereference

> -----Original Message-----
> From: linux-scsi-owner@...r.kernel.org [mailto:linux-scsi-
> owner@...r.kernel.org] On Behalf Of Jakob Normark
> Sent: Thursday, May 16, 2013 1:12 AM
> To: Anil Gurumurthy; Vijay Mohan Guvva; James E.J. Bottomley
> Cc: linux-scsi@...r.kernel.org; linux-kernel@...r.kernel.org; Jakob Normark
> Subject: [PATCH 1/1] bfa: Fixes for 0-terminated strncpy and possible null
> pointer dereference
> 
> This patch fixes two cppcheck errors in drivers/scsi/bfa/bfad_im.c Kernel
> version: v3.10-rc1
> 
> Signed-off-by: Jakob Normark <jakobnormark@...il.com>
> ---
>  drivers/scsi/bfa/bfad_im.c |    9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/scsi/bfa/bfad_im.c b/drivers/scsi/bfa/bfad_im.c index
> 5864f98..9489c56 100644
> --- a/drivers/scsi/bfa/bfad_im.c
> +++ b/drivers/scsi/bfa/bfad_im.c
> @@ -944,13 +944,15 @@ static int
>  bfad_im_slave_alloc(struct scsi_device *sdev)  {
>  	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
> -	struct bfad_itnim_data_s *itnim_data =
> -				(struct bfad_itnim_data_s *) rport->dd_data;
> -	struct bfa_s *bfa = itnim_data->itnim->bfa_itnim->bfa;
> +	struct bfad_itnim_data_s *itnim_data;
> +	struct bfa_s *bfa;
> 
>  	if (!rport || fc_remote_port_chkready(rport))
>  		return -ENXIO;
> 
> +	itnim_data = (struct bfad_itnim_data_s *) rport->dd_data;
> +	bfa = itnim_data->itnim->bfa_itnim->bfa;
> +
>  	if (bfa_get_lun_mask_status(bfa) == BFA_LUNMASK_ENABLED) {
>  		/*
>  		 * We should not mask LUN 0 - since this will translate @@ -
> 1037,6 +1039,7 @@ bfad_fc_host_init(struct bfad_im_port_s *im_port)
> 
>  	strncpy(symname, bfad-
> >bfa_fcs.fabric.bport.port_cfg.sym_name.symname,
>  		BFA_SYMNAME_MAXLEN);
> +	symname[BFA_SYMNAME_MAXLEN - 1] = '\0';
>  	sprintf(fc_host_symbolic_name(host), "%s", symname);
> 
>  	fc_host_supported_speeds(host) =
> bfad_im_supported_speeds(&bfad->bfa);
> --
> 1.7.9.5

Changes looks good. Thanks for the patch.
Acked-by: Vijay Mohan Guvva <vmohan@...cade.com>


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