Re: [PATCH] hw/nvme: fix missing check for PMR capability

[Klaus Jensen]

On Jun  7 11:47, Klaus Jensen wrote:
> From: Klaus Jensen <k.jensen@samsung.com>
>
> Qiang Liu reported that an access on an unknown address is triggered in
> memory_region_set_enabled because a check on CAP.PMRS is missing for the
> PMRCTL register write when no PMR is configured.
>
> Cc: qemu-stable@nongnu.org
> Fixes: 75c3c9de961d ("hw/block/nvme: disable PMR at boot up")
> Resolves: https://gitlab.com/qemu-project/qemu/-/issues/362
> Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
> ---
> hw/nvme/ctrl.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
> index 0bcaf7192f99..463772602c4e 100644
> --- a/hw/nvme/ctrl.c
> +++ b/hw/nvme/ctrl.c
> @@ -5583,6 +5583,10 @@ static void nvme_write_bar(NvmeCtrl *n, hwaddr offset, 
> uint64_t data,
>                        "invalid write to PMRCAP register, ignored");
>         return;
>     case 0xe04: /* PMRCTL */
> +        if (!NVME_CAP_PMRS(n->bar.cap)) {
> +            return;
> +        }
> +
>         n->bar.pmrctl = data;
>         if (NVME_PMRCTL_EN(data)) {
>             memory_region_set_enabled(&n->pmr.dev->mr, true);
> --
> 2.31.1

Applied to nvme-next!

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