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From 1920bc35d149d2b28658e5354468df407c9799f1 Mon Sep 17 00:00:00 2001
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From: Kevin Wolf <kwolf@redhat.com>
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Date: Thu, 5 Jul 2018 16:47:51 +0200
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Subject: [PATCH 190/268] block: Don't silently truncate node names
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RH-Author: Kevin Wolf <kwolf@redhat.com>
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Message-id: <20180705164751.15271-2-kwolf@redhat.com>
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Patchwork-id: 81234
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O-Subject: [RHV-7.6 qemu-kvm-rhev PATCH 1/1] block: Don't silently truncate node names
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Bugzilla: 1549654
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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RH-Acked-by: Max Reitz <mreitz@redhat.com>
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RH-Acked-by: John Snow <jsnow@redhat.com>
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If the user passes a too long node name string, we silently truncate it
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to fit into BlockDriverState.node_name, i.e. to 31 characters. Apart
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from surprising the user when the node has a different name than
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requested, this also bypasses the check for duplicate names, so that the
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same name can be assigned to multiple nodes.
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Fix this by just making too long node names an error.
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Reported-by: Peter Krempa <pkrempa@redhat.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit 824808dd77821ceba05357cb1ee4069a6a95bebd)
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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block.c | 6 ++++++
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tests/qemu-iotests/051 | 15 +++++++++++++++
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tests/qemu-iotests/051.out | 23 +++++++++++++++++++++++
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tests/qemu-iotests/051.pc.out | 23 +++++++++++++++++++++++
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4 files changed, 67 insertions(+)
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diff --git a/block.c b/block.c
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index afe30ca..0516284 100644
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--- a/block.c
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+++ b/block.c
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@@ -1140,6 +1140,12 @@ static void bdrv_assign_node_name(BlockDriverState *bs,
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goto out;
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}
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+ /* Make sure that the node name isn't truncated */
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+ if (strlen(node_name) >= sizeof(bs->node_name)) {
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+ error_setg(errp, "Node name too long");
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+ goto out;
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+ }
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+
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/* copy node name into the bs and insert it into the graph list */
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pstrcpy(bs->node_name, sizeof(bs->node_name), node_name);
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QTAILQ_INSERT_TAIL(&graph_bdrv_states, bs, node_list);
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diff --git a/tests/qemu-iotests/051 b/tests/qemu-iotests/051
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index 69d34eb..c5cc0ee 100755
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--- a/tests/qemu-iotests/051
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+++ b/tests/qemu-iotests/051
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@@ -100,6 +100,21 @@ run_qemu -drive file="$TEST_IMG",driver=raw,format=qcow2
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run_qemu -drive file="$TEST_IMG",driver=qcow2,format=qcow2
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echo
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+echo === Node names ===
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+echo
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+
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+# Maximum length: 31 characters
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+run_qemu -drive file="$TEST_IMG",node-name=x123456789012345678901234567890
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+run_qemu -drive file="$TEST_IMG",node-name=x1234567890123456789012345678901
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+
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+# First character must be alphabetic
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+# Following characters alphanumeric or -._
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+run_qemu -drive file="$TEST_IMG",node-name=All-Types.of_all0wed_chars
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+run_qemu -drive file="$TEST_IMG",node-name=123foo
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+run_qemu -drive file="$TEST_IMG",node-name=_foo
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+run_qemu -drive file="$TEST_IMG",node-name=foo#12
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+
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+echo
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echo === Device without drive ===
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echo
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diff --git a/tests/qemu-iotests/051.out b/tests/qemu-iotests/051.out
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index dd9846d..b727350 100644
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--- a/tests/qemu-iotests/051.out
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+++ b/tests/qemu-iotests/051.out
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@@ -47,6 +47,29 @@ Testing: -drive file=TEST_DIR/t.qcow2,driver=qcow2,format=qcow2
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QEMU_PROG: -drive file=TEST_DIR/t.qcow2,driver=qcow2,format=qcow2: Cannot specify both 'driver' and 'format'
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+=== Node names ===
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+
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+Testing: -drive file=TEST_DIR/t.qcow2,node-name=x123456789012345678901234567890
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+QEMU X.Y.Z monitor - type 'help' for more information
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+(qemu) quit
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+
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+Testing: -drive file=TEST_DIR/t.qcow2,node-name=x1234567890123456789012345678901
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+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,node-name=x1234567890123456789012345678901: Node name too long
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+
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+Testing: -drive file=TEST_DIR/t.qcow2,node-name=All-Types.of_all0wed_chars
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+QEMU X.Y.Z monitor - type 'help' for more information
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+(qemu) quit
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+
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+Testing: -drive file=TEST_DIR/t.qcow2,node-name=123foo
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+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,node-name=123foo: Invalid node name
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+
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+Testing: -drive file=TEST_DIR/t.qcow2,node-name=_foo
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+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,node-name=_foo: Invalid node name
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+
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+Testing: -drive file=TEST_DIR/t.qcow2,node-name=foo#12
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+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,node-name=foo#12: Invalid node name
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+
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+
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=== Device without drive ===
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Testing: -device VIRTIO_SCSI -device scsi-hd
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diff --git a/tests/qemu-iotests/051.pc.out b/tests/qemu-iotests/051.pc.out
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index b01f9a9..e9257fe 100644
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--- a/tests/qemu-iotests/051.pc.out
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+++ b/tests/qemu-iotests/051.pc.out
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@@ -47,6 +47,29 @@ Testing: -drive file=TEST_DIR/t.qcow2,driver=qcow2,format=qcow2
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QEMU_PROG: -drive file=TEST_DIR/t.qcow2,driver=qcow2,format=qcow2: Cannot specify both 'driver' and 'format'
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+=== Node names ===
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+
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+Testing: -drive file=TEST_DIR/t.qcow2,node-name=x123456789012345678901234567890
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+QEMU X.Y.Z monitor - type 'help' for more information
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+(qemu) quit
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+
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+Testing: -drive file=TEST_DIR/t.qcow2,node-name=x1234567890123456789012345678901
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+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,node-name=x1234567890123456789012345678901: Node name too long
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+
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+Testing: -drive file=TEST_DIR/t.qcow2,node-name=All-Types.of_all0wed_chars
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+QEMU X.Y.Z monitor - type 'help' for more information
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+(qemu) quit
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+
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+Testing: -drive file=TEST_DIR/t.qcow2,node-name=123foo
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+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,node-name=123foo: Invalid node name
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+
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+Testing: -drive file=TEST_DIR/t.qcow2,node-name=_foo
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+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,node-name=_foo: Invalid node name
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+
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+Testing: -drive file=TEST_DIR/t.qcow2,node-name=foo#12
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+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,node-name=foo#12: Invalid node name
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+
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+
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=== Device without drive ===
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Testing: -device VIRTIO_SCSI -device scsi-hd
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--
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1.8.3.1
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