Re: [PATCH 2/2] scsi_transport_fc: fix NULL pointer dereference in fc_bsg_job_timeout

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On Thu, Sep 07, 2017 at 01:54:36PM +0200, Christoph Hellwig wrote:
> bsg-lib now embeddeds the job structure into the request, and req->special
> can't be used anymore.
> 
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> ---
>  drivers/scsi/scsi_transport_fc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
> index 892fbd9800d9..bea06de60827 100644
> --- a/drivers/scsi/scsi_transport_fc.c
> +++ b/drivers/scsi/scsi_transport_fc.c
> @@ -3550,7 +3550,7 @@ fc_vport_sched_delete(struct work_struct *work)
>  static enum blk_eh_timer_return
>  fc_bsg_job_timeout(struct request *req)
>  {
> -	struct bsg_job *job = (void *) req->special;
> +	struct bsg_job *job = blk_mq_rq_to_pdu(req);
>  	struct Scsi_Host *shost = fc_bsg_to_shost(job);
>  	struct fc_rport *rport = fc_bsg_to_rport(job);
>  	struct fc_internal *i = to_fc_internal(shost->transportt);
> -- 
> 2.11.0
> 

Reviewed-by: Ming Lei <ming.lei@xxxxxxxxxx>

-- 
Ming



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