Commit cc18cc5e authored by Pavel Begunkov's avatar Pavel Begunkov Committed by Jens Axboe
Browse files

io_uring: mem-account pbuf buckets 



Potentially, someone may create as many pbuf bucket as there are indexes
in an xarray without any other restrictions bounding our memory usage,
put memory needed for the buckets under memory accounting.

Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarPavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/d34c452e45793e978d26e2606211ec9070d329ea.1659622312.git.asml.silence@gmail.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent f482aa98

io_uring/kbuf.c

+1 −1
Original line number Diff line number Diff line
@@ -436,7 +436,7 @@ int io_provide_buffers(struct io_kiocb *req, unsigned int issue_flags) 


	bl = io_buffer_get_list(ctx, p->bgid);

	if (unlikely(!bl)) {

		bl = kzalloc(sizeof(*bl), GFP_KERNEL);

		bl = kzalloc(sizeof(*bl), GFP_KERNEL_ACCOUNT);

		if (!bl) {

			ret = -ENOMEM;

			goto err;