| Message ID | 20180112101356.27044-1-zhengxiang9@huawei.com |
|---|---|
| State | New |
| Headers | show |
| Series | vhost: fix corrupting GPA 0 when using uninitialized queues | expand |
Hi,
This series seems to have some coding style problems. See output below for
more information:
Type: series
Message-id: 20180112101356.27044-1-zhengxiang9@huawei.com
Subject: [Qemu-devel] [PATCH] vhost: fix corrupting GPA 0 when using uninitialized queues
=== TEST SCRIPT BEGIN ===
#!/bin/bash
BASE=base
n=1
total=$(git log --oneline $BASE.. | wc -l)
failed=0
git config --local diff.renamelimit 0
git config --local diff.renames True
commits="$(git log --format=%H --reverse $BASE..)"
for c in $commits; do
echo "Checking PATCH $n/$total: $(git log -n 1 --format=%s $c)..."
if ! git show $c --format=email | ./scripts/checkpatch.pl --mailback -; then
failed=1
echo
fi
n=$((n+1))
done
exit $failed
=== TEST SCRIPT END ===
Updating 3c8cf5a9c21ff8782164d1def7f44bd888713384
Switched to a new branch 'test'
fb66f184ae vhost: fix corrupting GPA 0 when using uninitialized queues
=== OUTPUT BEGIN ===
Checking PATCH 1/1: vhost: fix corrupting GPA 0 when using uninitialized queues...
ERROR: trailing whitespace
#32: FILE: hw/virtio/vhost.c:1535:
+ if (virtio_queue_get_desc_addr(vdev, hdev->vq_index + i) == 0) $
total: 1 errors, 0 warnings, 8 lines checked
Your patch has style problems, please review. If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.
=== OUTPUT END ===
Test command exited with code: 1
---
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Please send your feedback to patchew-devel@freelists.org
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index e4290ce..ac79ffd 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -1532,6 +1532,8 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev) goto fail_mem; } for (i = 0; i < hdev->nvqs; ++i) { + if (virtio_queue_get_desc_addr(vdev, hdev->vq_index + i) == 0) + continue; r = vhost_virtqueue_start(hdev, vdev, hdev->vqs + i,
When guest driver only setup part of queues declared in QEMU, it would corrupt guest's physical address 0 when using uninitialized queues in vhost_virtqueue_start. In AARCH64 virtual machines, the address of system memory starts at 0x40000000 and the address of rom starts at 0. So, when using qemu with vhost-scsi, it will fail with below error: qemu-kvm: Error start vhost dev qemu-kvm: unable to start vhost-scsi: Cannot allocate memory This patch fix this issue by skipping calling vhost_virtqueue_start for uninitialized queues. Cc: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Zheng Xiang <zhengxiang9@huawei.com> --- hw/virtio/vhost.c | 2 ++ 1 file changed, 2 insertions(+)