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From 981daae137fd383944e72dbea8f147499eb9add4 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 16:21:56 +0200
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Subject: [PATCH 02/42] qcow2: Catch bdrv_getlength() error
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Message-id: <1434212556-3927-3-git-send-email-mreitz@redhat.com>
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Patchwork-id: 66021
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O-Subject: [RHEL-7.2 qemu-kvm PATCH 02/42] qcow2: Catch bdrv_getlength() error
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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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BZ: 1129893
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The call to bdrv_getlength() from qcow2_check_refcounts() may result in
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an error. Check this and abort if necessary.
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit a49139af77850d64d74f9ffe43cabe7aa4f19de0)
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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-refcount.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c
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index 429b01c..4f86923 100644
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--- a/block/qcow2-refcount.c
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+++ b/block/qcow2-refcount.c
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@@ -1478,6 +1478,11 @@ int qcow2_check_refcounts(BlockDriverState *bs, BdrvCheckResult *res,
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int ret;
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size = bdrv_getlength(bs->file);
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+ if (size < 0) {
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+ res->check_errors++;
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+ return size;
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+ }
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+
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nb_clusters = size_to_clusters(s, size);
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if (nb_clusters > INT_MAX) {
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res->check_errors++;
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--
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1.8.3.1
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