io_uring/fs: check unused sqe fields for unlinkat

Zero check unused SQE fields addr3 and pad2 for unlinkat. They're
not needed now, but could be used sometime in the future.

Signed-off-by: Yi Xie <xieyi@kylinos.cn>
Reviewed-by: Gabriel Krisman Bertazi <krisman@suse.de>
Link: https://patch.msgid.link/20260714030306.64820-1-xieyi@kylinos.cn
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/io_uring/fs.c b/io_uring/fs.c
index d0580c754bf867070c6aa00acb3167ff210d58e3..26ea841a22e700a5429280a923680b9ea7e619f5 100644 (file)
--- a/io_uring/fs.c
+++ b/io_uring/fs.c
@@ -110,7 +110,8 @@ int io_unlinkat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
        const char __user *fname;
        int err;
 
-       if (sqe->off || sqe->len || sqe->buf_index || sqe->splice_fd_in)
+       if (sqe->off || sqe->len || sqe->buf_index || sqe->splice_fd_in ||
+           sqe->addr3 || sqe->__pad2[0])
                return -EINVAL;
        if (unlikely(req->flags & REQ_F_FIXED_FILE))
                return -EBADF;