> -----Original Message-----
> From: Cathy Avery [mailto:cav...@redhat.com]
> Sent: Wednesday, November 23, 2016 5:47 AM
> To: KY Srinivasan <k...@microsoft.com>; Haiyang Zhang
> <haiya...@microsoft.com>; j...@linux.vnet.ibm.com;
> martin.peter...@oracle.com
> Cc: de...@linuxdriverproject.org; linux-ker...@vger.kernel.org; linux-
> s...@vger.kernel.org
> Subject: [PATCH v2] [hv] storvsc: Payload buffer incorrectly sized for 32 bit
> kernels.
>
> On a 32 bit kernel sizeof(void *) is not 64 bits as hv_mpb_array
> requires. Also the buffer needs to be cleared or the upper bytes
> will contain junk.
>
> Suggested-by: Vitaly Kuznetsov <vkuzn...@redhat.com>
> Signed-off-by: Cathy Avery <cav...@redhat.com>
Thanks Cathy.
Reviewed-by: K. Y. Srinivasan <k...@microsoft.com>
>
> ChangeLog:
>
> v1) Initial submission
> v2) Remove memset and replace kmalloc with kzalloc.
> ---
> drivers/scsi/storvsc_drv.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
> index 8ccfc9e..05526b7 100644
> --- a/drivers/scsi/storvsc_drv.c
> +++ b/drivers/scsi/storvsc_drv.c
> @@ -1495,9 +1495,9 @@ static int storvsc_queuecommand(struct Scsi_Host
> *host, struct scsi_cmnd *scmnd)
> if (sg_count) {
> if (sg_count > MAX_PAGE_BUFFER_COUNT) {
>
> - payload_sz = (sg_count * sizeof(void *) +
> + payload_sz = (sg_count * sizeof(u64) +
> sizeof(struct vmbus_packet_mpb_array));
> - payload = kmalloc(payload_sz, GFP_ATOMIC);
> + payload = kzalloc(payload_sz, GFP_ATOMIC);
> if (!payload)
> return SCSI_MLQUEUE_DEVICE_BUSY;
> }
> --
> 2.5.0
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