6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jia Jia [ Upstream commit 22598f55a4c2b510b3df5e69e563387a963222ae ] vhost-scsi translates guest response descriptors into userspace iovecs when commands are submitted. Target-core completes those commands asynchronously, so VHOST_SET_MEM_TABLE can replace the memory table while an in-flight command still retains response iovecs translated through the old table. If the old mapping is reused after VHOST_SET_MEM_TABLE returns, command completion can write the response to an unrelated userspace object. Flush the vhost-scsi backend after vhost_dev_ioctl() handles a device ioctl. This waits for in-flight commands that can still use the old response iovecs before the ioctl returns. Signed-off-by: Jia Jia Signed-off-by: Michael S. Tsirkin Message-ID: <20260724060919.1569170-1-physicalmtea@gmail.com> Signed-off-by: Sasha Levin --- drivers/vhost/scsi.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c index 90a3c0fc5ab0a..7603597efe5ef 100644 --- a/drivers/vhost/scsi.c +++ b/drivers/vhost/scsi.c @@ -2095,9 +2095,10 @@ vhost_scsi_ioctl(struct file *f, default: mutex_lock(&vs->dev.mutex); r = vhost_dev_ioctl(&vs->dev, ioctl, argp); - /* TODO: flush backend after dev ioctl. */ if (r == -ENOIOCTLCMD) r = vhost_vring_ioctl(&vs->dev, ioctl, argp); + else + vhost_scsi_flush(vs); mutex_unlock(&vs->dev.mutex); return r; } -- 2.53.0