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From a38284209acf74b1e44b32deca45da2cf451ba68 Mon Sep 17 00:00:00 2001
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Message-Id: <a38284209acf74b1e44b32deca45da2cf451ba68.1418766606.git.jen@redhat.com>
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In-Reply-To: <6f81b4847eb68ebdf54a8f1a771e19d112d74152.1418766606.git.jen@redhat.com>
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References: <6f81b4847eb68ebdf54a8f1a771e19d112d74152.1418766606.git.jen@redhat.com>
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From: Fam Zheng <famz@redhat.com>
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Date: Thu, 4 Dec 2014 00:05:01 -0600
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Subject: [CHANGE 07/31] vmdk: Check for overhead when opening
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To: rhvirt-patches@redhat.com,
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jen@redhat.com
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RH-Author: Fam Zheng <famz@redhat.com>
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Message-id: <1417651524-18041-8-git-send-email-famz@redhat.com>
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Patchwork-id: 62680
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O-Subject: [RHEL-7.1 qemu-kvm PATCH v5 07/30] vmdk: Check for overhead when opening
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Bugzilla: 1134251
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RH-Acked-by: Jeffrey Cody <jcody@redhat.com>
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RH-Acked-by: Markus Armbruster <armbru@redhat.com>
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RH-Acked-by: Max Reitz <mreitz@redhat.com>
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Report an error if file size is even smaller than metadata.
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Signed-off-by: Fam Zheng <famz@redhat.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit 34ceed81f9ca31829448276dafe3d9151d66962c)
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Signed-off-by: Fam Zheng <famz@redhat.com>
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Signed-off-by: Jeff E. Nelson <jen@redhat.com>
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---
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block/vmdk.c | 7 +++++++
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tests/qemu-iotests/059 | 6 ++++++
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tests/qemu-iotests/059.out | 5 +++++
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3 files changed, 18 insertions(+)
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diff --git a/block/vmdk.c b/block/vmdk.c
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index 4226baa..7ea3aef 100644
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--- a/block/vmdk.c
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+++ b/block/vmdk.c
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@@ -636,6 +636,13 @@ static int vmdk_open_vmdk4(BlockDriverState *bs,
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if (le32_to_cpu(header.flags) & VMDK4_FLAG_RGD) {
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l1_backup_offset = le64_to_cpu(header.rgd_offset) << 9;
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}
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+ if (bdrv_getlength(file) <
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+ le64_to_cpu(header.grain_offset) * BDRV_SECTOR_SIZE) {
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+ error_report("File truncated, expecting at least %lld bytes",
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+ le64_to_cpu(header.grain_offset) * BDRV_SECTOR_SIZE);
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+ return -EINVAL;
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+ }
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+
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ret = vmdk_add_extent(bs, file, false,
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le64_to_cpu(header.capacity),
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le64_to_cpu(header.gd_offset) << 9,
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diff --git a/tests/qemu-iotests/059 b/tests/qemu-iotests/059
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index dde4a59..71b7b49 100755
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--- a/tests/qemu-iotests/059
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+++ b/tests/qemu-iotests/059
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@@ -98,6 +98,12 @@ EOF
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_img_info
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echo
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+echo "=== Testing truncated sparse ==="
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+IMGOPTS="subformat=monolithicSparse" _make_test_img 100G
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+truncate -s 10M $TEST_IMG
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+_img_info
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+
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+echo
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echo "=== Testing version 3 ==="
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_use_sample_img iotest-version3.vmdk.bz2
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_img_info
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diff --git a/tests/qemu-iotests/059.out b/tests/qemu-iotests/059.out
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index 75d9858..f4ca52d 100644
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--- a/tests/qemu-iotests/059.out
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+++ b/tests/qemu-iotests/059.out
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@@ -2043,6 +2043,11 @@ qemu-img: Could not open 'TEST_DIR/t.IMGFMT': Invalid extent lines:
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RW 12582912 VMFS "dummy.IMGFMT" 1
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+=== Testing truncated sparse ===
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+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=107374182400
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+qemu-img: File truncated, expecting at least 13172736 bytes
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+qemu-img: Could not open 'TEST_DIR/t.IMGFMT': Could not open 'TEST_DIR/t.IMGFMT': Wrong medium type
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+
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=== Testing version 3 ===
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image: TEST_DIR/iotest-version3.IMGFMT
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file format: IMGFMT
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--
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2.1.0
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