On 2022/8/12 20:40, Jens Axboe wrote: > On 8/12/22 2:39 AM, Chengming Zhou wrote: >> We will try to get request from cache before alloc request, in >> both cases will first attempt bio merge. >> >> This patch move this common part to blk_mq_submit_bio(), which >> simplify the code and avoid passing in the pointer of bio. > > I don't think this will work. If we get a cached request, then we > know we have a reference to the queue. If you swap these around, > then that's no longer the case and we can have a use-after-free if > the queue goes away. > Sorry, thanks for your reply!
