From 2905cd48c18448ef509ef05f168202e19904ff5c Mon Sep 17 00:00:00 2001 From: Pavel Begunkov Date: Thu, 4 Aug 2022 15:13:46 +0100 Subject: [PATCH] io_uring: mem-account pbuf buckets commit cc18cc5e82033d406f54144ad6f8092206004684 upstream. 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: Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/d34c452e45793e978d26e2606211ec9070d329ea.1659622312.git.asml.silence@gmail.com Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- io_uring/io_uring.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index 27ce532c6c8d..6a67dbf5195f 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -5520,7 +5520,7 @@ static 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;