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Re: [PATCH v2] spapr: Fix Coverity warning while validating nvdimm optio
From: |
Greg Kurz |
Subject: |
Re: [PATCH v2] spapr: Fix Coverity warning while validating nvdimm options |
Date: |
Thu, 27 Feb 2020 14:58:29 +0100 |
On Thu, 27 Feb 2020 07:42:49 -0600
Shivaprasad G Bhat <address@hidden> wrote:
> Fixes Coverity issue,
> CID 1419883: Error handling issues (CHECKED_RETURN)
> Calling "qemu_uuid_parse" without checking return value
>
> nvdimm_set_uuid() already verifies if the user provided uuid is valid or
> not. So, need to check for the validity during pre-plug validation again.
>
> As this a false positive in this case, assert if not valid to be safe.
> Also, error_abort if QOM accessor encounters error while fetching the uuid
> property.
>
> Reported-by: Coverity (CID 1419883)
> Signed-off-by: Shivaprasad G Bhat <address@hidden>
> ---
You should theoretically add the list of changes since the previous
version but fortunately the patch is simple enough to figure this
out :)
LGTM
Reviewed-by: Greg Kurz <address@hidden>
> hw/ppc/spapr_nvdimm.c | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/hw/ppc/spapr_nvdimm.c b/hw/ppc/spapr_nvdimm.c
> index 74eeb8bb74..25be8082d7 100644
> --- a/hw/ppc/spapr_nvdimm.c
> +++ b/hw/ppc/spapr_nvdimm.c
> @@ -35,6 +35,7 @@ void spapr_nvdimm_validate_opts(NVDIMMDevice *nvdimm,
> uint64_t size,
> {
> char *uuidstr = NULL;
> QemuUUID uuid;
> + int ret;
>
> if (size % SPAPR_MINIMUM_SCM_BLOCK_SIZE) {
> error_setg(errp, "NVDIMM memory size excluding the label area"
> @@ -43,8 +44,10 @@ void spapr_nvdimm_validate_opts(NVDIMMDevice *nvdimm,
> uint64_t size,
> return;
> }
>
> - uuidstr = object_property_get_str(OBJECT(nvdimm), NVDIMM_UUID_PROP,
> NULL);
> - qemu_uuid_parse(uuidstr, &uuid);
> + uuidstr = object_property_get_str(OBJECT(nvdimm), NVDIMM_UUID_PROP,
> + &error_abort);
> + ret = qemu_uuid_parse(uuidstr, &uuid);
> + g_assert(!ret);
> g_free(uuidstr);
>
> if (qemu_uuid_is_null(&uuid)) {
>