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=-9.1 required=3.0 tests=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 EE45BC48BD6 for ; Thu, 27 Jun 2019 00:47:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BCBF0214DA for ; Thu, 27 Jun 2019 00:47:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561596442; bh=4/3vjvdk34NJM5Y+r4/kbZxQgC1cIU67KjwIcNXuFE4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=NBn47hfCnVoQRgvKN1S5eZrJKeDL9CFpLGrCPiFAZE86iKoXaE5F5oprlG5bkN+pa rVTQz4dNS2LNec1UxooXGnYO+n2RxoMUoTzoj7xNrZqGXQdW8oaaWWywkDhCxb6WQT iUaPkx/Mp4vO7iZngpBW/ihOCQGq8W5U8x7f2e40= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729042AbfF0AjK (ORCPT ); Wed, 26 Jun 2019 20:39:10 -0400 Received: from mail.kernel.org ([198.145.29.99]:43384 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729026AbfF0AjJ (ORCPT ); Wed, 26 Jun 2019 20:39:09 -0400 Received: from sasha-vm.mshome.net (unknown [107.242.116.147]) (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 692FE21852; Thu, 27 Jun 2019 00:39:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561595948; bh=4/3vjvdk34NJM5Y+r4/kbZxQgC1cIU67KjwIcNXuFE4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=D4fMLngNTCuL6r2i3xY7DPLlnJbGouNJ+8b0KKLdZF5M0pz0/4gBU1f/7mbzhBRjd +Gmanz+34iOrHrBsiSKxObSTfvEbt5hmFwLs7EfdquDvHNZXHIAJ3aUItsOCE160Xq /cRi2tlVk52eKPYU63GctXgbPaMEkO6uSrkllObk= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Colin Ian King , Dan Carpenter , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 55/60] net: lio_core: fix potential sign-extension overflow on large shift Date: Wed, 26 Jun 2019 20:36:10 -0400 Message-Id: <20190627003616.20767-55-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190627003616.20767-1-sashal@kernel.org> References: <20190627003616.20767-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Colin Ian King [ Upstream commit 9476274093a0e79b905f4cd6cf6d149f65e02c17 ] Left shifting the signed int value 1 by 31 bits has undefined behaviour and the shift amount oq_no can be as much as 63. Fix this by using BIT_ULL(oq_no) instead. Addresses-Coverity: ("Bad shift operation") Fixes: f21fb3ed364b ("Add support of Cavium Liquidio ethernet adapters") Signed-off-by: Colin Ian King Reviewed-by: Dan Carpenter Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/cavium/liquidio/lio_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/cavium/liquidio/lio_core.c b/drivers/net/ethernet/cavium/liquidio/lio_core.c index 8093c5eafea2..781814835a4f 100644 --- a/drivers/net/ethernet/cavium/liquidio/lio_core.c +++ b/drivers/net/ethernet/cavium/liquidio/lio_core.c @@ -985,7 +985,7 @@ static void liquidio_schedule_droq_pkt_handlers(struct octeon_device *oct) if (droq->ops.poll_mode) { droq->ops.napi_fn(droq); - oct_priv->napi_mask |= (1 << oq_no); + oct_priv->napi_mask |= BIT_ULL(oq_no); } else { tasklet_schedule(&oct_priv->droq_tasklet); } -- 2.20.1