Hi Andy,
> -----Original Message-----
> From: Pei, Andy <andy....@intel.com>
> Sent: Wednesday, June 8, 2022 3:34 PM
> To: dev@dpdk.org
> Cc: Xia, Chenbo <chenbo....@intel.com>; maxime.coque...@redhat.com; Wang,
> Xiao W <xiao.w.w...@intel.com>; Xu, Rosen <rosen...@intel.com>; Xiao,
> QimaiX <qimaix.x...@intel.com>
> Subject: [PATCH] vdpa/ifc: fix null pointer dereference
>
> Fix null pointer dereference reported in coverity scan.
>
> Coverity issue: 378882
> Fixes: 8162a4a9 ("vdpa/ifc/base: access correct register for blk device")
Commit id need to be 12 digits. Also pls leave a blank line between Fixes tag
and signed-off
Thanks,
Chenbo
> Signed-off-by: Andy Pei <andy....@intel.com>
> ---
> drivers/vdpa/ifc/base/ifcvf.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/drivers/vdpa/ifc/base/ifcvf.c b/drivers/vdpa/ifc/base/ifcvf.c
> index dd475a7..0a9f71a 100644
> --- a/drivers/vdpa/ifc/base/ifcvf.c
> +++ b/drivers/vdpa/ifc/base/ifcvf.c
> @@ -255,6 +255,10 @@
> u32 ring_state;
>
> cfg = hw->common_cfg;
> + if (!cfg) {
> + DEBUGOUT("common_cfg in HW is NULL.\n");
> + return;
> + }
>
> IFCVF_WRITE_REG16(IFCVF_MSI_NO_VECTOR, &cfg->msix_config);
> for (i = 0; i < hw->nr_vring; i++) {
> @@ -262,6 +266,11 @@
> IFCVF_WRITE_REG16(0, &cfg->queue_enable);
> IFCVF_WRITE_REG16(IFCVF_MSI_NO_VECTOR, &cfg-
> >queue_msix_vector);
>
> + if (!hw->lm_cfg) {
> + DEBUGOUT("live migration cfg in HW is NULL.\n");
> + continue;
> + }
> +
> if (hw->device_type == IFCVF_BLK)
> ring_state = *(u32 *)(hw->lm_cfg +
> IFCVF_LM_RING_STATE_OFFSET +
> --
> 1.8.3.1
