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[PATCH v2] spapr: Fix Coverity warning while validating nvdimm options

From: Shivaprasad G Bhat
Subject: [PATCH v2] spapr: Fix Coverity warning while validating nvdimm options
Date: Thu, 27 Feb 2020 07:42:49 -0600
User-agent: StGit/0.17.1-dirty

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

Reported-by: Coverity (CID 1419883)
Signed-off-by: Shivaprasad G Bhat <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;
         error_setg(errp, "NVDIMM memory size excluding the label area"
@@ -43,8 +44,10 @@ void spapr_nvdimm_validate_opts(NVDIMMDevice *nvdimm, 
uint64_t size,
-    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);
     if (qemu_uuid_is_null(&uuid)) {

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