From 1ad707f19e570b76c1f6517194d9cc86b084014d Mon Sep 17 00:00:00 2001
Message-Id: <1ad707f19e570b76c1f6517194d9cc86b084014d@dist-git>
From: Peter Krempa <pkrempa@redhat.com>
Date: Thu, 1 Dec 2022 17:02:42 +0100
Subject: [PATCH] qemuAgentGetDisks: Don't use virJSONValueObjectGetStringArray
 for optional data

The 'dependencies' field in the return data may be missing in some
cases. Historically 'virJSONValueObjectGetStringArray' didn't report
error in such case, but later refactor (commit 043b50b948ef3c2 ) added
an error in order to use it in other places too.

Unfortunately this results in the error log being spammed with an
irrelevant error in case when qemuAgentGetDisks is invoked on a VM
running windows.

Replace the use of virJSONValueObjectGetStringArray by fetching the
array first and calling virJSONValueArrayToStringList only when we have
an array.

Fixes: 043b50b948ef3c2a4adf5fa32a93ec2589851ac6
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2149752
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
(cherry picked from commit 3b576601dfb924bb518870a01de5d1a421cbb467)
---
 src/qemu/qemu_agent.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/qemu/qemu_agent.c b/src/qemu/qemu_agent.c
index f33cd47078..8a55044c9e 100644
--- a/src/qemu/qemu_agent.c
+++ b/src/qemu/qemu_agent.c
@@ -2550,6 +2550,7 @@ int qemuAgentGetDisks(qemuAgent *agent,
     for (i = 0; i < ndata; i++) {
         virJSONValue *addr;
         virJSONValue *entry = virJSONValueArrayGet(data, i);
+        virJSONValue *dependencies;
         qemuAgentDiskInfo *disk;
 
         if (!entry) {
@@ -2575,7 +2576,11 @@ int qemuAgentGetDisks(qemuAgent *agent,
             goto error;
         }
 
-        disk->dependencies = virJSONValueObjectGetStringArray(entry, "dependencies");
+        if ((dependencies = virJSONValueObjectGetArray(entry, "dependencies"))) {
+            if (!(disk->dependencies = virJSONValueArrayToStringList(dependencies)))
+                goto error;
+        }
+
         disk->alias = g_strdup(virJSONValueObjectGetString(entry, "alias"));
         addr = virJSONValueObjectGetObject(entry, "address");
         if (addr) {
-- 
2.39.0