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