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From 14898a26978613278b0a2508c077179144d54b39 Mon Sep 17 00:00:00 2001
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Message-Id: <14898a26978613278b0a2508c077179144d54b39@dist-git>
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From: Jiri Denemark <jdenemar@redhat.com>
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Date: Thu, 2 Aug 2018 16:56:02 +0200
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Subject: [PATCH] qemu_migration: Avoid writing to freed memory
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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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When a domain is killed on the source host while it is being migrated
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and libvirtd is waiting for the migration to finish (waiting for the
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domain condition in qemuMigrationSrcWaitForCompletion), the run-time
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state including priv->job.current may already be freed once
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virDomainObjWait returns with -1. Thus the priv->job.current pointer
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cached in jobInfo is no longer valid and setting jobInfo->status may
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crash the daemon.
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https://bugzilla.redhat.com/show_bug.cgi?id=1593137
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Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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(cherry picked from commit dddcb601ebf97ef222a03bb27b2357e831e8a0cc)
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https://bugzilla.redhat.com/show_bug.cgi?id=1615854
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Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
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Reviewed-by: Erik Skultety <eskultet@redhat.com>
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---
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src/qemu/qemu_migration.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
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index 435cd174af..825a9d399b 100644
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--- a/src/qemu/qemu_migration.c
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+++ b/src/qemu/qemu_migration.c
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@@ -1584,7 +1584,8 @@ qemuMigrationSrcWaitForCompletion(virQEMUDriverPtr driver,
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if (events) {
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if (virDomainObjWait(vm) < 0) {
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- jobInfo->status = QEMU_DOMAIN_JOB_STATUS_FAILED;
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+ if (virDomainObjIsActive(vm))
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+ jobInfo->status = QEMU_DOMAIN_JOB_STATUS_FAILED;
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return -2;
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}
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} else {
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--
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2.18.0
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