On Tue, Sep 01, 2020 at 08:00:06AM -0400, Miaohe Lin wrote: > When bio is full, __bio_iov_iter_get_pages() would return error directly > while left page reference still held in pages. Release these references. > Also advance the iov_iter according to what we have done successfully. > > Fixes: 576ed9135489 ("block: use bio_add_page in bio_iov_iter_get_pages") > Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx> The WARN_ON means something is fundamentally wrong here. I think a few leaked pages are the least of our problems in this case.