From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 34527C43464 for ; Fri, 18 Sep 2020 02:35:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0323422208 for ; Fri, 18 Sep 2020 02:35:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600396506; bh=rp2MtuOtqaiWynmAiae5qUivFISxFYqzpDj0K3Bdf1U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=JpInRO7HjQNKimzojAoNUXycI+t25/fcx95r0EHWo/t9W00OEM5M64MP3Yj0ANm7e R9UBLhxOVR0voTfu6s5J51QxIOrmPJBddlm6c8dq+0JO6XmILjGXsEAdw/h7WVcAJX Aj5Td8mZ2GVWFqtWiK8HLzl5LlhOV2rsI8p380J4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729494AbgIRCfE (ORCPT ); Thu, 17 Sep 2020 22:35:04 -0400 Received: from mail.kernel.org ([198.145.29.99]:40426 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728470AbgIRCNU (ORCPT ); Thu, 17 Sep 2020 22:13:20 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 97EFF2376E; Fri, 18 Sep 2020 02:13:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600395199; bh=rp2MtuOtqaiWynmAiae5qUivFISxFYqzpDj0K3Bdf1U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zgTqNucnokxH5jzyqKXba0cdvivVFmSglHhcY7tH4fB0cj1H2KbWDTjUsS0c3vLjL g5BH6y6ruAfJwHH+kI5Ds6KZSqvK9FJCbdEbdMI/kvO1IYLx2t/nieRnrTqVNvm5NI 8RXpZCTl+xXnqGieCmxRR+Ev+oY9NGOrnqjVO+D8= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Bart Van Assche , Leon Romanovsky , Jason Gunthorpe , Sasha Levin , linux-rdma@vger.kernel.org Subject: [PATCH AUTOSEL 4.14 049/127] RDMA/rxe: Fix configuration of atomic queue pair attributes Date: Thu, 17 Sep 2020 22:11:02 -0400 Message-Id: <20200918021220.2066485-49-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200918021220.2066485-1-sashal@kernel.org> References: <20200918021220.2066485-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Bart Van Assche [ Upstream commit fb3063d31995cc4cf1d47a406bb61d6fb1b1d58d ] >From the comment above the definition of the roundup_pow_of_two() macro: The result is undefined when n == 0. Hence only pass positive values to roundup_pow_of_two(). This patch fixes the following UBSAN complaint: UBSAN: Undefined behaviour in ./include/linux/log2.h:57:13 shift exponent 64 is too large for 64-bit type 'long unsigned int' Call Trace: dump_stack+0xa5/0xe6 ubsan_epilogue+0x9/0x26 __ubsan_handle_shift_out_of_bounds.cold+0x4c/0xf9 rxe_qp_from_attr.cold+0x37/0x5d [rdma_rxe] rxe_modify_qp+0x59/0x70 [rdma_rxe] _ib_modify_qp+0x5aa/0x7c0 [ib_core] ib_modify_qp+0x3b/0x50 [ib_core] cma_modify_qp_rtr+0x234/0x260 [rdma_cm] __rdma_accept+0x1a7/0x650 [rdma_cm] nvmet_rdma_cm_handler+0x1286/0x14cd [nvmet_rdma] cma_cm_event_handler+0x6b/0x330 [rdma_cm] cma_ib_req_handler+0xe60/0x22d0 [rdma_cm] cm_process_work+0x30/0x140 [ib_cm] cm_req_handler+0x11f4/0x1cd0 [ib_cm] cm_work_handler+0xb8/0x344e [ib_cm] process_one_work+0x569/0xb60 worker_thread+0x7a/0x5d0 kthread+0x1e6/0x210 ret_from_fork+0x24/0x30 Link: https://lore.kernel.org/r/20200217205714.26937-1-bvanassche@acm.org Fixes: 8700e3e7c485 ("Soft RoCE driver") Signed-off-by: Bart Van Assche Reviewed-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe Signed-off-by: Sasha Levin --- drivers/infiniband/sw/rxe/rxe_qp.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c index 25055a68a2c07..ef7fd5dfad468 100644 --- a/drivers/infiniband/sw/rxe/rxe_qp.c +++ b/drivers/infiniband/sw/rxe/rxe_qp.c @@ -593,15 +593,16 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask, struct ib_gid_attr sgid_attr; if (mask & IB_QP_MAX_QP_RD_ATOMIC) { - int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic); + int max_rd_atomic = attr->max_rd_atomic ? + roundup_pow_of_two(attr->max_rd_atomic) : 0; qp->attr.max_rd_atomic = max_rd_atomic; atomic_set(&qp->req.rd_atomic, max_rd_atomic); } if (mask & IB_QP_MAX_DEST_RD_ATOMIC) { - int max_dest_rd_atomic = - __roundup_pow_of_two(attr->max_dest_rd_atomic); + int max_dest_rd_atomic = attr->max_dest_rd_atomic ? + roundup_pow_of_two(attr->max_dest_rd_atomic) : 0; qp->attr.max_dest_rd_atomic = max_dest_rd_atomic; -- 2.25.1