From: Jens Axboe <axboe@kernel.dk>
Date: Fri, 7 Feb 2020 04:42:51 +0000 (-0700)
Subject: io_uring: allow AT_FDCWD for non-file openat/openat2/statx
X-Git-Tag: v5.6-rc2~17^2~9
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=0b5faf6ba7fb78bb1fe7336d23ea1978386a6c3a;p=thirdparty%2Fkernel%2Flinux.git

io_uring: allow AT_FDCWD for non-file openat/openat2/statx

Don't just check for dirfd == -1, we should allow AT_FDCWD as well for
relative lookups.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 2a7bb178986e0..e6247b94c29dc 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -4543,7 +4543,7 @@ static int io_req_needs_file(struct io_kiocb *req, int fd)
 {
 	if (!io_op_defs[req->opcode].needs_file)
 		return 0;
-	if (fd == -1 && io_op_defs[req->opcode].fd_non_neg)
+	if ((fd == -1 || fd == AT_FDCWD) && io_op_defs[req->opcode].fd_non_neg)
 		return 0;
 	return 1;
 }