diff options
| author | Jay Zhou <jianjay.zhou@huawei.com> | 2018-01-12 10:47:57 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2018-01-18 21:52:39 +0200 |
| commit | f4bf56fb78ed0e9f60fa1ed656c14ff4c494da5a (patch) | |
| tree | d5a30ac7e2374d362cc7a927665d1938ed1e03ba /hw/virtio | |
| parent | 69aff030643c1616474458cf7e19fc15a5f8f462 (diff) | |
vhost: remove assertion to prevent crash
QEMU will assert on vhost-user backed virtio device hotplug if QEMU is
using more RAM regions than VHOST_MEMORY_MAX_NREGIONS (for example if
it were started with a lot of DIMM devices).
Fix it by returning error instead of asserting and let callers of
vhost_set_mem_table() handle error condition gracefully.
Cc: qemu-stable@nongnu.org
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Jay Zhou <jianjay.zhou@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/virtio')
| -rw-r--r-- | hw/virtio/vhost-user.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c index 7930fd85fc..6eb97980ad 100644 --- a/hw/virtio/vhost-user.c +++ b/hw/virtio/vhost-user.c @@ -342,11 +342,14 @@ static int vhost_user_set_mem_table(struct vhost_dev *dev, &offset); fd = memory_region_get_fd(mr); if (fd > 0) { + if (fd_num == VHOST_MEMORY_MAX_NREGIONS) { + error_report("Failed preparing vhost-user memory table msg"); + return -1; + } msg.payload.memory.regions[fd_num].userspace_addr = reg->userspace_addr; msg.payload.memory.regions[fd_num].memory_size = reg->memory_size; msg.payload.memory.regions[fd_num].guest_phys_addr = reg->guest_phys_addr; msg.payload.memory.regions[fd_num].mmap_offset = offset; - assert(fd_num < VHOST_MEMORY_MAX_NREGIONS); fds[fd_num++] = fd; } } |