On 8/12/21 2:40 PM, Pavel Begunkov wrote: > For the bug description see 2/2. As mentioned there the current problems > is because of generic_write_checks(), but there was also a similar case > fixed in 5.12, which should have been triggerable by normal > write(2)/read(2) and others. > > It may be better to enforce reexpands as a long term solution, but for > now this patchset is quickier and easier to backport. > > v2: don't fail it has been justly fully reverted Al, what do you think of this approach? It'll fix the issue, but might be cleaner to have iov->truncated actually track the truncated size. That'd make it a more complete solution, at the expense of bloat iov_iter which this version will not. -- Jens Axboe
