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From 97dafbcc080bdb3253dbd451c94ab8f687b156ba Mon Sep 17 00:00:00 2001
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Message-Id: <97dafbcc080bdb3253dbd451c94ab8f687b156ba@dist-git>
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From: Peter Krempa <pkrempa@redhat.com>
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Date: Tue, 4 Feb 2020 15:07:48 +0100
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Subject: [PATCH] qemu: snapshot: Prevent too-nested domain XML when doing
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inactive snapshot
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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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Similarly to 510d154a0b41aa70aadabc0918d16dee22882394 we need to prevent
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doing too deeply nested backing chains and reject them with a sane error
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message.
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Add a loop to go through the snapshots prior to attempting actually
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creating them to prevent some possible inconsistent scenarios.
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We don't need to do it when reusing backing chains as we'll be
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re-detecting the backing chain in that case anyways.
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Signed-off-by: Peter Krempa <pkrempa@redhat.com>
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Reviewed-by: Eric Blake <eblake@redhat.com>
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(cherry picked from commit b168fa88b85dec181882816ab65a59a6c4500667)
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https://bugzilla.redhat.com/show_bug.cgi?id=1524278
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Message-Id: <3272682df55dcc564055a2badb0c61d4680c81a9.1580824112.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_driver.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
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index 5c72db2544..833cf9f3d9 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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@@ -14632,6 +14632,9 @@ qemuDomainSnapshotCreateInactiveExternal(virQEMUDriverPtr driver,
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if (!snapdisk->src->format)
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snapdisk->src->format = VIR_STORAGE_FILE_QCOW2;
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+ if (qemuDomainStorageSourceValidateDepth(defdisk->src, 1, defdisk->dst) < 0)
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+ return -1;
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+
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/* creates cmd line args: qemu-img create -f qcow2 -o */
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if (!(cmd = virCommandNewArgList(qemuImgPath,
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"create",
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--
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2.25.0
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