Jens, if you want I can do the backport for 5.8.

Stefano

On Mon, Sep 28, 2020 at 04:04:25PM +0200, gregkh@linuxfoundation.org wrote:

The patch below does not apply to the 5.8-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From f3cd4850504ff612d0ea77a0aaf29b66c98fcefe Mon Sep 17 00:00:00 2001 From: Jens Axboe axboe@kernel.dk Date: Thu, 24 Sep 2020 14:55:54 -0600 Subject: [PATCH] io_uring: ensure open/openat2 name is cleaned on cancelation

If we cancel these requests, we'll leak the memory associated with the filename. Add them to the table of ops that need cleaning, if REQ_F_NEED_CLEANUP is set.

Cc: stable@vger.kernel.org Fixes: e62753e4e292 ("io_uring: call statx directly") Reviewed-by: Stefano Garzarella sgarzare@redhat.com Signed-off-by: Jens Axboe axboe@kernel.dk

diff --git a/fs/io_uring.c b/fs/io_uring.c index e6004b92e553..0ab16df31288 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -5671,6 +5671,11 @@ static void __io_clean_op(struct io_kiocb *req) io_put_file(req, req->splice.file_in, (req->splice.flags & SPLICE_F_FD_IN_FIXED)); break;

• case IORING_OP_OPENAT:
  

• case IORING_OP_OPENAT2:
  

• 	if (req->open.filename)
  

• 		putname(req->open.filename);
  

• 	break;
  

  } req->flags &= ~REQ_F_NEED_CLEANUP; }