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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 BEEF8C34022 for ; Mon, 17 Feb 2020 20:57:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9D5AA2070B for ; Mon, 17 Feb 2020 20:57:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729782AbgBQU5V (ORCPT ); Mon, 17 Feb 2020 15:57:21 -0500 Received: from mail-pg1-f194.google.com ([209.85.215.194]:34529 "EHLO mail-pg1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728088AbgBQU5U (ORCPT ); Mon, 17 Feb 2020 15:57:20 -0500 Received: by mail-pg1-f194.google.com with SMTP id j4so9848251pgi.1 for ; Mon, 17 Feb 2020 12:57:20 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=xDJ1INKlr0jBh0nzphKk8e6EypzafLBOB8DTFCzK1+g=; b=V2GsPNrtbWj+BYNpjKX2higCYouOQzO6dHtoCinzXez7YrnIOt99uSjAUgOlzSVR0f TfzVBLNeOq44FaAGGMGODKbkAQj8jhjruKmVWSZY7cLDOd+6RW8fS2SuLvd092yz44xm TJX5YAVBjwEzNLN6eXsSyNnp96a2XKxGrD5lKbJMC3Ez1honjlmQr4ZtFv2MADZRZ8Y+ JNscCit1ZhzPk0HvmCIGteEzsFmpW16HKHLKixmpj30uwLslF2HW1CEbwDqU5b7QjmPN 3qEvCegZn5W4xHNtKIUwq/vSpzBEdHKQzKfD5vxUHXip74bUIn+UKB34b6xl8fJwshhy FYTA== X-Gm-Message-State: APjAAAUViwP3bS/ZUoXJo6iIGpJLNCFioZVgywX9lBwk5hXmC8ZeA4CQ 4FNUIVC6dunVDA0iDlweBlE= X-Google-Smtp-Source: APXvYqz6oGdNqlJ4Z6Xc1sDYBxO+mBpHsM56aNFtmjvDGJyoH9Edqkk9oxSMKVdvLDL/8tV0D+mvIA== X-Received: by 2002:aa7:9891:: with SMTP id r17mr18540435pfl.205.1581973040031; Mon, 17 Feb 2020 12:57:20 -0800 (PST) Received: from asus.hsd1.ca.comcast.net ([2601:647:4000:d7:2474:e036:5bee:ca5b]) by smtp.gmail.com with ESMTPSA id x21sm1318466pfq.76.2020.02.17.12.57.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Feb 2020 12:57:19 -0800 (PST) From: Bart Van Assche To: Jason Gunthorpe Cc: Leon Romanovsky , Doug Ledford , linux-rdma@vger.kernel.org, Bart Van Assche , Moni Shoua Subject: [PATCH] RDMA/rxe: Fix configuration of atomic queue pair attributes Date: Mon, 17 Feb 2020 12:57:14 -0800 Message-Id: <20200217205714.26937-1-bvanassche@acm.org> X-Mailer: git-send-email 2.25.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org >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 Cc: Moni Shoua Fixes: 8700e3e7c485 ("Soft RoCE driver") Signed-off-by: Bart Van Assche --- 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 ec21f616ac98..6c11c3aeeca6 100644 --- a/drivers/infiniband/sw/rxe/rxe_qp.c +++ b/drivers/infiniband/sw/rxe/rxe_qp.c @@ -590,15 +590,16 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask, int err; 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;