6.5-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jens Axboe <axboe@xxxxxxxxx>
commit a52d4f657568d6458e873f74a9602e022afe666f upstream.
This is unionized with the actual link flags, so they can of course be
set and they will be evaluated further down. If not we fail any LINKAT
that has to set option flags.
Fixes: cf30da90bc3a ("io_uring: add support for IORING_OP_LINKAT")
Cc: stable@xxxxxxxxxxxxxxx
Reported-by: Thomas Leonard <talex5@xxxxxxxxx>
Link: https://github.com/axboe/liburing/issues/955
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
io_uring/fs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/io_uring/fs.c
+++ b/io_uring/fs.c
@@ -243,7 +243,7 @@ int io_linkat_prep(struct io_kiocb *req,
struct io_link *lnk = io_kiocb_to_cmd(req, struct io_link);
const char __user *oldf, *newf;
- if (sqe->rw_flags || sqe->buf_index || sqe->splice_fd_in)
+ if (sqe->buf_index || sqe->splice_fd_in)
return -EINVAL;
if (unlikely(req->flags & REQ_F_FIXED_FILE))
return -EBADF;
