On Mon, 25 Nov 2024 23:10:31 +0000, Pavel Begunkov wrote:
> io_pages_unmap() is a bit tricky in trying to figure whether the pages
> were previously vmap'ed or not. In particular If there is juts one page
> it belives there is no need to vunmap. Paired io_pages_map(), however,
> could've failed io_mem_alloc_compound() and attempted to
> io_mem_alloc_single(), which does vmap, and that leads to unpaired vmap.
>
> The solution is to fail if io_mem_alloc_compound() can't allocate a
> single page. That's the easiest way to deal with it, and those two
> functions are getting removed soon, so no need to overcomplicate it.
>
> [...]
Applied, thanks!
[1/1] io_uring: fix corner case forgetting to vunmap
commit: 43eef70e7e2ac74e7767731dd806720c7fb5e010
Best regards,
--
Jens Axboe
