On Wed, Sep 23, 2015 at 07:02:32PM +0530, Sudip Mukherjee wrote:
> kmalloc() can return NULL and without checking we were dereferencing it.
> Moreover if kmalloc succeeds but the function fails in other parts then
> we were returning the error code but we missed freeing lcb_context.
> While at it fixed one related checkpatch warning.
>
> Signed-off-by: Sudip Mukherjee <su...@vectorindia.org>
> ---
A gentle ping.
regards
sudip
>
> I am not exactly sure if LSRJT_UNABLE_TPC is the right error code here.
> But that was my best guess.
>
> drivers/scsi/lpfc/lpfc_els.c | 8 +++++++-
> 1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
> index 36bf58b..a27efd9 100644
> --- a/drivers/scsi/lpfc/lpfc_els.c
> +++ b/drivers/scsi/lpfc/lpfc_els.c
> @@ -5209,7 +5209,6 @@ lpfc_els_rcv_lcb(struct lpfc_vport *vport, struct
> lpfc_iocbq *cmdiocb,
> rjt_err = LSRJT_CMD_UNSUPPORTED;
> goto rjt;
> }
> - lcb_context = kmalloc(sizeof(struct lpfc_lcb_context), GFP_KERNEL);
>
> if (phba->hba_flag & HBA_FCOE_MODE) {
> rjt_err = LSRJT_CMD_UNSUPPORTED;
> @@ -5240,6 +5239,12 @@ lpfc_els_rcv_lcb(struct lpfc_vport *vport, struct
> lpfc_iocbq *cmdiocb,
> goto rjt;
> }
>
> + lcb_context = kmalloc(sizeof(*lcb_context), GFP_KERNEL);
> + if (!lcb_context) {
> + rjt_err = LSRJT_UNABLE_TPC;
> + goto rjt;
> + }
> +
> state = (beacon->lcb_sub_command == LPFC_LCB_ON) ? 1 : 0;
> lcb_context->sub_command = beacon->lcb_sub_command;
> lcb_context->type = beacon->lcb_type;
> @@ -5250,6 +5255,7 @@ lpfc_els_rcv_lcb(struct lpfc_vport *vport, struct
> lpfc_iocbq *cmdiocb,
> if (lpfc_sli4_set_beacon(vport, lcb_context, state)) {
> lpfc_printf_vlog(ndlp->vport, KERN_ERR,
> LOG_ELS, "0193 failed to send mail box");
> + kfree(lcb_context);
> lpfc_nlp_put(ndlp);
> rjt_err = LSRJT_UNABLE_TPC;
> goto rjt;
> --
> 1.9.1
>
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