On Wed, Jun 17, 2015 at 04:51:07PM +0530, Maninder Singh wrote:
> Currently cmnd pointer is already dereferenced before NULL check
> and thus getting below warning in static analysis:
> warn: variable dereferenced before check 'cmnd'
>
> So initialize struct scsi_device *sdp after NULL check
> of cmnd
>
>
> Signed-off-by: Maninder Singh <maninder1.s@xxxxxxxxxxx>
> Reviewed-by: Akhilesh Kumar <akhilesh.k@xxxxxxxxxxx>
> ---
> drivers/scsi/scsi_debug.c | 4 +++-
> 1 files changed, 3 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
> index 1f8e2dc..bb97a5a 100644
> --- a/drivers/scsi/scsi_debug.c
> +++ b/drivers/scsi/scsi_debug.c
> @@ -3942,7 +3942,7 @@ schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
> unsigned long iflags;
> int k, num_in_q, qdepth, inject;
> struct sdebug_queued_cmd *sqcp = NULL;
> - struct scsi_device *sdp = cmnd->device;
> + struct scsi_device *sdp;
>
> if (NULL == cmnd || NULL == devip) {
> pr_warn("%s: called with NULL cmnd or devip pointer\n",
> @@ -3950,6 +3950,8 @@ schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
> /* no particularly good error to report back */
> return SCSI_MLQUEUE_HOST_BUSY;
> }
> +
> + sdp = cmnd->device;
> if ((scsi_result) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
> sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
> __func__, scsi_result);
> --
> 1.7.1
>
> --
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Reviewed-by: Johannes Thumshirn <jthumshirn@xxxxxxx>
--
Johannes Thumshirn Storage
jthumshirn@xxxxxxx +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton
HRB 21284 (AG Nürnberg)
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