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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 37F7AC2BC11 for ; Tue, 8 Sep 2020 19:24:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EC0642087D for ; Tue, 8 Sep 2020 19:24:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1599593085; bh=i+H5koQax4E1xZlNxo71mIVDMgy5YRr0zxNBvBBJNNg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=H3ZSPalsKuSFlIPGsnqvX9rvmBVQCb/a9FDgBZUULT/xsCwONQdXTPBsYGnynBX82 D3gW56IQY8iN+8ISmohTdInlde+2PLXsOqHe/pcMmuS6Su8idZv9yHAxiuLPD2ZaWb UiD8R2gT1TM2tZRco1etOk2kCrUFlm0XA3igyaCQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732103AbgIHTYn (ORCPT ); Tue, 8 Sep 2020 15:24:43 -0400 Received: from mail.kernel.org ([198.145.29.99]:48726 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730845AbgIHQBY (ORCPT ); Tue, 8 Sep 2020 12:01:24 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 075C723EF6; Tue, 8 Sep 2020 15:37:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1599579480; bh=i+H5koQax4E1xZlNxo71mIVDMgy5YRr0zxNBvBBJNNg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kaM9w2v1gsAeURcufYPUf+SnIdy+zcviQIauE7P5K0h3kKy9wSQeTbJXVVBEtOAAw m8C4WhfcqY1FG67N/keyA10EMf7IouraDLS9DMSgcp0sAfI9omdz2LNrF8thcIHV2O QARwxHKBSa+1rzR2GWqX4Lw8g3X+NzF/KUIfiwlM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Shung-Hsi Yu , "David S. Miller" , Sasha Levin Subject: [PATCH 5.8 095/186] net: ethernet: mlx4: Fix memory allocation in mlx4_buddy_init() Date: Tue, 8 Sep 2020 17:23:57 +0200 Message-Id: <20200908152246.239084509@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200908152241.646390211@linuxfoundation.org> References: <20200908152241.646390211@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Shung-Hsi Yu [ Upstream commit cbedcb044e9cc4e14bbe6658111224bb923094f4 ] On machines with much memory (> 2 TByte) and log_mtts_per_seg == 0, a max_order of 31 will be passed to mlx_buddy_init(), which results in s = BITS_TO_LONGS(1 << 31) becoming a negative value, leading to kvmalloc_array() failure when it is converted to size_t. mlx4_core 0000:b1:00.0: Failed to initialize memory region table, aborting mlx4_core: probe of 0000:b1:00.0 failed with error -12 Fix this issue by changing the left shifting operand from a signed literal to an unsigned one. Fixes: 225c7b1feef1 ("IB/mlx4: Add a driver Mellanox ConnectX InfiniBand adapters") Signed-off-by: Shung-Hsi Yu Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/mellanox/mlx4/mr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/mr.c b/drivers/net/ethernet/mellanox/mlx4/mr.c index d2986f1f2db02..d7444782bfdd0 100644 --- a/drivers/net/ethernet/mellanox/mlx4/mr.c +++ b/drivers/net/ethernet/mellanox/mlx4/mr.c @@ -114,7 +114,7 @@ static int mlx4_buddy_init(struct mlx4_buddy *buddy, int max_order) goto err_out; for (i = 0; i <= buddy->max_order; ++i) { - s = BITS_TO_LONGS(1 << (buddy->max_order - i)); + s = BITS_TO_LONGS(1UL << (buddy->max_order - i)); buddy->bits[i] = kvmalloc_array(s, sizeof(long), GFP_KERNEL | __GFP_ZERO); if (!buddy->bits[i]) goto err_out_free; -- 2.25.1