From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.kernel.org ([198.145.29.99]:42808 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1163766AbeE1Kxn (ORCPT ); Mon, 28 May 2018 06:53:43 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Chien Tin Tung , Shiraz Saleem , Leon Romanovsky , Jason Gunthorpe , Sasha Levin Subject: [PATCH 4.14 275/496] RDMA/ucma: Correct option size check using optlen Date: Mon, 28 May 2018 12:01:00 +0200 Message-Id: <20180528100331.435301840@linuxfoundation.org> In-Reply-To: <20180528100319.498712256@linuxfoundation.org> References: <20180528100319.498712256@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Chien Tin Tung [ Upstream commit 5f3e3b85cc0a5eae1c46d72e47d3de7bf208d9e2 ] The option size check is using optval instead of optlen causing the set option call to fail. Use the correct field, optlen, for size check. Fixes: 6a21dfc0d0db ("RDMA/ucma: Limit possible option size") Signed-off-by: Chien Tin Tung Signed-off-by: Shiraz Saleem Reviewed-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/infiniband/core/ucma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/infiniband/core/ucma.c +++ b/drivers/infiniband/core/ucma.c @@ -1315,7 +1315,7 @@ static ssize_t ucma_set_option(struct uc if (IS_ERR(ctx)) return PTR_ERR(ctx); - if (unlikely(cmd.optval > KMALLOC_MAX_SIZE)) + if (unlikely(cmd.optlen > KMALLOC_MAX_SIZE)) return -EINVAL; optval = memdup_user((void __user *) (unsigned long) cmd.optval,