libvirt/SOURCES/libvirt-qemuDomainGetGuestInfo-Don-t-try-to-free-a-negative-number-of-entries.patch

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From c03fef652341b4ee8969b2a0229e2ef9046a9cee Mon Sep 17 00:00:00 2001
Message-Id: <c03fef652341b4ee8969b2a0229e2ef9046a9cee@dist-git>
From: Peter Krempa <pkrempa@redhat.com>
Date: Mon, 16 Mar 2020 22:11:35 +0100
Subject: [PATCH] qemuDomainGetGuestInfo: Don't try to free a negative number
of entries
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
'nfs' variable was set to -1 or -2 on agent failure. Cleanup then tried
to free 'nfs' elements of the array which resulted into a crash.
Make 'nfs' size_t and assign it only on successful agent call.
https://bugzilla.redhat.com/show_bug.cgi?id=1812965
Broken by commit 599ae372d8cf092
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
(cherry picked from commit 0fdb7385e416c9a0830dc60c0a56d55428963d74)
https://bugzilla.redhat.com/show_bug.cgi?id=1812965
Message-Id: <6eb97463bb380d32591ef82336095bf1ef370bca.1584391726.git.pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
---
src/qemu/qemu_agent.c | 2 +-
src/qemu/qemu_driver.c | 12 ++++++++----
2 files changed, 9 insertions(+), 5 deletions(-)
diff --git a/src/qemu/qemu_agent.c b/src/qemu/qemu_agent.c
index ef2d2c500b..f13126aeee 100644
--- a/src/qemu/qemu_agent.c
+++ b/src/qemu/qemu_agent.c
@@ -1954,7 +1954,7 @@ qemuAgentGetFSInfoFillDisks(virJSONValuePtr jsondisks,
return 0;
}
-/* Returns: 0 on success
+/* Returns: number of entries in '@info' on success
* -2 when agent command is not supported by the agent
* -1 otherwise
*/
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 8c7e90531a..0bdb2851ec 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -23101,7 +23101,7 @@ qemuDomainGetGuestInfo(virDomainPtr dom,
g_autofree char *hostname = NULL;
unsigned int supportedTypes = types;
int rc;
- int nfs = 0;
+ size_t nfs = 0;
qemuAgentFSInfoPtr *agentfsinfo = NULL;
size_t i;
@@ -23154,9 +23154,13 @@ qemuDomainGetGuestInfo(virDomainPtr dom,
}
}
if (supportedTypes & VIR_DOMAIN_GUEST_INFO_FILESYSTEM) {
- rc = nfs = qemuAgentGetFSInfo(agent, &agentfsinfo);
- if (rc < 0 && !(rc == -2 && types == 0))
- goto exitagent;
+ rc = qemuAgentGetFSInfo(agent, &agentfsinfo);
+ if (rc < 0) {
+ if (!(rc == -2 && types == 0))
+ goto exitagent;
+ } else {
+ nfs = rc;
+ }
}
ret = 0;
--
2.25.1