This is a note to let you know that I've just added the patch titled
io_uring: mem-account pbuf buckets
to the 5.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
io_uring-mem-account-pbuf-buckets.patch
and it can be found in the queue-5.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From cc18cc5e82033d406f54144ad6f8092206004684 Mon Sep 17 00:00:00 2001
From: Pavel Begunkov <asml.silence@xxxxxxxxx>
Date: Thu, 4 Aug 2022 15:13:46 +0100
Subject: io_uring: mem-account pbuf buckets
From: Pavel Begunkov <asml.silence@xxxxxxxxx>
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: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
Link: https://lore.kernel.org/r/d34c452e45793e978d26e2606211ec9070d329ea.1659622312.git.asml.silence@xxxxxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
io_uring/io_uring.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -4927,7 +4927,7 @@ static int io_provide_buffers(struct io_
bl = io_buffer_get_list(ctx, p->bgid);
if (unlikely(!bl)) {
- bl = kmalloc(sizeof(*bl), GFP_KERNEL);
+ bl = kzalloc(sizeof(*bl), GFP_KERNEL_ACCOUNT);
if (!bl) {
ret = -ENOMEM;
goto err;
Patches currently in stable-queue which might be from asml.silence@xxxxxxxxx are
queue-5.18/skbuff-don-t-mix-ubuf_info-from-different-sources.patch
queue-5.18/io_uring-mem-account-pbuf-buckets.patch
