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

[Jens Axboe <axboe@kernel.dk>]

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 # v5.6+
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;
 	}

-- 
Jens Axboe