[PATCH 5.8] io_uring: ensure open/openat2 name is cleaned on cancelation

[Stefano Garzarella <sgarzare@redhat.com>]

From: Jens Axboe <axboe@kernel.dk>

[ Upstream commit f3cd4850504ff612d0ea77a0aaf29b66c98fcefe ]

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>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
---
 fs/io_uring.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index d05023ca74bd..864341445926 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -5252,6 +5252,8 @@ static void io_cleanup_req(struct io_kiocb *req)
 		break;
 	case IORING_OP_OPENAT:
 	case IORING_OP_OPENAT2:
+		if (req->open.filename)
+			putname(req->open.filename);
 		break;
 	case IORING_OP_SPLICE:
 	case IORING_OP_TEE:
-- 
2.26.2