[ upstream commit cc18cc5e82033d406f54144ad6f8092206004684 ]
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: Pavel Begunkov asml.silence@gmail.com Link: https://lore.kernel.org/r/d34c452e45793e978d26e2606211ec9070d329ea.165962231... Signed-off-by: Jens Axboe axboe@kernel.dk --- fs/io_uring.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c index e8e769be9ed0..9fa702d707af 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -5738,7 +5738,7 @@ 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;