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Message-Id: <20210712061049.881445152@linuxfoundation.org>
Date: Mon, 12 Jul 2021 08:12:58 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Dmitry Kadashev <dkadashev@...il.com>,
Jens Axboe <axboe@...nel.dk>
Subject: [PATCH 5.12 695/700] io_uring: add IOPOLL and reserved field checks to IORING_OP_RENAMEAT
From: Jens Axboe <axboe@...nel.dk>
commit ed7eb2592286ead7d3bfdf8adf65e65392167cc4 upstream.
We can't support IOPOLL with non-pollable request types, and we should
check for unused/reserved fields like we do for other request types.
Fixes: 80a261fd0032 ("io_uring: add support for IORING_OP_RENAMEAT")
Cc: stable@...r.kernel.org
Reported-by: Dmitry Kadashev <dkadashev@...il.com>
Signed-off-by: Jens Axboe <axboe@...nel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
fs/io_uring.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3497,6 +3497,10 @@ static int io_renameat_prep(struct io_ki
struct io_rename *ren = &req->rename;
const char __user *oldf, *newf;
+ if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
+ return -EINVAL;
+ if (sqe->ioprio || sqe->buf_index)
+ return -EINVAL;
if (unlikely(req->flags & REQ_F_FIXED_FILE))
return -EBADF;
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