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From 9c887fdb82a6500aec6897f5c7f48f6bd31a33fc Mon Sep 17 00:00:00 2001
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From: Max Reitz <mreitz@redhat.com>
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Date: Sat, 13 Jun 2015 16:21:55 +0200
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Subject: [PATCH 01/42] qcow2: Put cache reference in error case
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Message-id: <1434212556-3927-2-git-send-email-mreitz@redhat.com>
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Patchwork-id: 66020
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O-Subject: [RHEL-7.2 qemu-kvm PATCH 01/42] qcow2: Put cache reference in error case
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Bugzilla: 1129893
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RH-Acked-by: Jeffrey Cody <jcody@redhat.com>
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RH-Acked-by: Fam Zheng <famz@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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From: Kevin Wolf <kwolf@redhat.com>
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BZ: 1129893
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When qcow2_get_cluster_offset() sees a zero cluster in a version 2
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image, it (rightfully) returns an error. But in doing so it shouldn't
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leak an L2 table cache reference.
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Reviewed-by: Max Reitz <mreitz@redhat.com>
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(cherry picked from commit 8885eadedd0ea8b57c1baa367ee2c2d616700bd9)
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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block/qcow2-cluster.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c
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index 81d90d9..1b9609f 100644
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--- a/block/qcow2-cluster.c
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+++ b/block/qcow2-cluster.c
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@@ -481,6 +481,7 @@ int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset,
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break;
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case QCOW2_CLUSTER_ZERO:
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if (s->qcow_version < 3) {
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+ qcow2_cache_put(bs, s->l2_table_cache, (void**) &l2_table);
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return -EIO;
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}
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c = count_contiguous_clusters(nb_clusters, s->cluster_size,
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--
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1.8.3.1
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