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io_uring: add IOPOLL and reserved field checks to IORING_OP_RENAMEAT

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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: 80a261fd00 ("io_uring: add support for IORING_OP_RENAMEAT")
Cc: stable@vger.kernel.org
Reported-by: Dmitry Kadashev <dkadashev@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2021-06-23 09:04:13 -06:00
parent 12dcb58ac7
commit ed7eb25922
1 changed files with 4 additions and 0 deletions
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4
fs/io_uring.c
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@ -3463,6 +3463,10 @@ static int io_renameat_prep(struct io_kiocb *req,
struct io_rename *ren = &req->rename; struct io_rename *ren = &req->rename;
const char __user *oldf, *newf; 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)) if (unlikely(req->flags & REQ_F_FIXED_FILE))
return -EBADF; return -EBADF;