From 283ffcce1ad9a34dcbb2dd6f67ba2a78a7d7626d Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Tue, 26 Apr 2022 19:34:57 -0600 Subject: [PATCH] io_uring: check reserved fields for recv/recvmsg [ Upstream commit 5a1e99b61b0c81388cde0c808b3e4173907df19f ] We should check unused fields for non-zero and -EINVAL if they are set, making it consistent with other opcodes. Fixes: aa1fa28fc73e ("io_uring: add support for recvmsg()") Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- fs/io_uring.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/io_uring.c b/fs/io_uring.c index 107bce75131eb..531d0086d0b33 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -5103,6 +5103,8 @@ static int io_recvmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL)) return -EINVAL; + if (unlikely(sqe->addr2 || sqe->file_index)) + return -EINVAL; sr->umsg = u64_to_user_ptr(READ_ONCE(sqe->addr)); sr->len = READ_ONCE(sqe->len);