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From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: hmadhani@marvell.com
Cc: Thomas Abraham <tabraham@suse.com>,
	jejb@linux.ibm.com, martin.petersen@oracle.com,
	linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
	hare@suse.com
Subject: Re: [PATCH] scsi: qla2xxx: avoid crash in qlt_handle_abts_completion() if mcmd == NULL
Date: Tue, 12 Nov 2019 20:41:52 -0500	[thread overview]
Message-ID: <yq11rucsgbj.fsf@oracle.com> (raw)
In-Reply-To: <20191104181803.5475-1-tabraham@suse.com> (Thomas Abraham's message of "Mon, 4 Nov 2019 13:18:03 -0500")


Himanshu: Ping.

Also see: https://patchwork.kernel.org/patch/11141981/

> qlt_ctio_to_cmd() will return a NULL mcmd if h == QLA_TGT_SKIP_HANDLE. If
> the error subcodes don't match the exact codes checked a crash will occur
> when calling free_mcmd on the null mcmd
>
> Signed-off-by: Thomas Abraham <tabraham@suse.com>
> ---
>  drivers/scsi/qla2xxx/qla_target.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
> index a06e56224a55..611ab224662f 100644
> --- a/drivers/scsi/qla2xxx/qla_target.c
> +++ b/drivers/scsi/qla2xxx/qla_target.c
> @@ -5732,7 +5732,8 @@ static void qlt_handle_abts_completion(struct scsi_qla_host *vha,
>  			    vha->vp_idx, entry->compl_status,
>  			    entry->error_subcode1,
>  			    entry->error_subcode2);
> -			ha->tgt.tgt_ops->free_mcmd(mcmd);
> +			if (mcmd)
> +				ha->tgt.tgt_ops->free_mcmd(mcmd);
>  		}
>  	} else if (mcmd) {
>  		ha->tgt.tgt_ops->free_mcmd(mcmd);

-- 
Martin K. Petersen	Oracle Linux Engineering

  parent reply	other threads:[~2019-11-13  1:43 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-04 18:18 [PATCH] scsi: qla2xxx: avoid crash in qlt_handle_abts_completion() if mcmd == NULL Thomas Abraham
2019-11-11 17:32 ` Roman Bolshakov
2019-11-13  1:41 ` Martin K. Petersen [this message]
2019-11-20 17:08 ` Lee Duncan

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