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vhost: fix log base address 

VHOST_SET_LOG_BASE got an incorrect address, causing
migration errors and potentially even memory corruption.

Reported-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Amos Kong <akong@redhat.com>
Message-id: 1429283565-32265-1-git-send-email-mst@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Michael S. Tsirkin 2015-04-17 17:13:24 +02:00 committed by Peter Maydell
parent 638b836620
commit e05ca82002
1 changed files with 5 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
hw/virtio/vhost.c
View File

@ -288,7 +288,7 @@ static inline void vhost_dev_log_resize(struct vhost_dev* dev, uint64_t size)
int r;
log = g_malloc0(size * sizeof *log);
log_base = (uint64_t)(unsigned long)log;
log_base = (uintptr_t)log;
r = dev->vhost_ops->vhost_call(dev, VHOST_SET_LOG_BASE, &log_base);
assert(r >= 0);
/* Sync only the range covered by the old log */
@ -1057,10 +1057,13 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev)
}
if (hdev->log_enabled) {
uint64_t log_base;
hdev->log_size = vhost_get_log_size(hdev);
hdev->log = hdev->log_size ?
g_malloc0(hdev->log_size * sizeof *hdev->log) : NULL;
r = hdev->vhost_ops->vhost_call(hdev, VHOST_SET_LOG_BASE, hdev->log);
log_base = (uintptr_t)hdev->log;
r = hdev->vhost_ops->vhost_call(hdev, VHOST_SET_LOG_BASE, &log_base);
if (r < 0) {
r = -errno;
goto fail_log;