From 17e6be412054ae22027a339614fca82d55e64973 Mon Sep 17 00:00:00 2001 From: qihao Date: Thu, 30 Mar 2023 17:45:11 +0800 Subject: [PATCH] vhost-user-blk: fix the resize crash cheery-pick from ab6075d849f4285fc730d3ae6e17418d65d09998 If the os is not installed and doesn't have the virtio guest driver, the vhost dev isn't started, so the dev->vdev is NULL. Reproduce: mount a Win 2019 iso, go into the install ui, then resize the virtio-blk device, qemu crash. Signed-off-by: qihao_yewu Signed-off-by: Li Feng Message-Id: <20220919121816.3252223-1-fengli@smartx.com> Reviewed-by: Raphael Norwitz Reviewed-by: Kevin Wolf Signed-off-by: Kevin Wolf --- hw/block/vhost-user-blk.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/hw/block/vhost-user-blk.c b/hw/block/vhost-user-blk.c index eb1264afc7..bcc3f83c4b 100644 --- a/hw/block/vhost-user-blk.c +++ b/hw/block/vhost-user-blk.c @@ -95,6 +95,10 @@ static int vhost_user_blk_handle_config_change(struct vhost_dev *dev) VHostUserBlk *s = VHOST_USER_BLK(dev->vdev); Error *local_err = NULL; + if (!dev->started) { + return 0; + } + ret = vhost_dev_get_config(dev, (uint8_t *)&blkcfg, sizeof(struct virtio_blk_config), &local_err); -- 2.27.0