From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-1153886-1521806844-2-7021255946438579473 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.25, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='CN', FromHeader='org', MailFrom='org' X-Spam-charsets: plain='UTF-8' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1521806844; b=OFSBIpCYdJedZo660VmK1ZpinhmfpoySU6kHOcdQs464PgV jDm5qE9S0C7/rhRaCstSNBnmCtsT6ypRm0bHs1lJpmB9FRZios/u/3qUkckTtWvi qqG2ZlT+tP/Ewg3wDSd6iooz89X+TE0nAqj3eLMYOs107r/0m1pN+hJic3M6ZN/v J4UNt079kT4PSKONyl0ks9UetG5/7NUFDQ9Ph22qBcKCxgPfEDTIjm2DvMhEyaCM ZvCWHehiA8SUnY/WkQrOmlBxi3I2Ya3PVDCV02E9tD9T+M7CD+sxhPnFZ5p/4dWE 2ijob6MYtIT0/yudTzhZf9FhIAYsklhumGTOabA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-type:sender :list-id; s=arctest; t=1521806844; bh=kmSAudrrn9ENWre6Io5ROoto3h BdYeZbS6hgAvj79L8=; b=XwfAqgu/ze8zP6AG3i4IqDEcHiUlkrmfRyrqAvC9BH We6eZAHcaR6e61EJn8qVzQ63XjRZnWznHm94NjNLxlrOhyZPh39pdj1qoC/1P83+ bXFYoOgHxZkmLBH8yIT3U81T6uqoCQa4PtxhnQOtuaMlKVRBiQ0eNZ+7m1e4Zn7T f/Biljuwi47ZtFO8KuWSct5slFWv/AgWUzPjl6czaYlmZsd/RO1oD6ObgON/0MxR NFXEAyWDw4Z9F/JVlmijGBQSZTpCkd0hREon+wVlOMK7PjWujsey94XCHn+b6oFj /50Rnvu5cRbsvTAZwWLZk0Jh2OmcZvuMolD8BKvyObaw== ARC-Authentication-Results: i=1; mx1.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes; x-vs=clean score=-100 state=0 Authentication-Results: mx1.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes; x-vs=clean score=-100 state=0 X-ME-VSCategory: clean Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753195AbeCWJ6t (ORCPT ); Fri, 23 Mar 2018 05:58:49 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:35858 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753150AbeCWJ6r (ORCPT ); Fri, 23 Mar 2018 05:58:47 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Niklas Cassel , Lorenzo Pieralisi , Kishon Vijay Abraham I , Sasha Levin Subject: [PATCH 4.15 52/84] PCI: endpoint: Fix find_first_zero_bit() usage Date: Fri, 23 Mar 2018 10:54:06 +0100 Message-Id: <20180323095419.842070254@linuxfoundation.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180323095411.913234798@linuxfoundation.org> References: <20180323095411.913234798@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Niklas Cassel [ Upstream commit 35ad61921f495ee14915d185de79478c1737b4da ] find_first_zero_bit()'s parameter 'size' is defined in bits, not in bytes. Calling find_first_zero_bit() with the wrong size unit will lead to insidious bugs. Fix this by calling find_first_zero_bit() with size BITS_PER_LONG, rather than sizeof() and add missing find_first_zero_bit() return handling. Fixes: d74679911610 ("PCI: endpoint: Introduce configfs entry for configuring EP functions") Signed-off-by: Niklas Cassel Signed-off-by: Lorenzo Pieralisi Acked-by: Kishon Vijay Abraham I Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/pci/endpoint/pci-ep-cfs.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/drivers/pci/endpoint/pci-ep-cfs.c +++ b/drivers/pci/endpoint/pci-ep-cfs.c @@ -109,7 +109,10 @@ static int pci_epc_epf_link(struct confi goto err_add_epf; func_no = find_first_zero_bit(&epc_group->function_num_map, - sizeof(epc_group->function_num_map)); + BITS_PER_LONG); + if (func_no >= BITS_PER_LONG) + return -EINVAL; + set_bit(func_no, &epc_group->function_num_map); epf->func_no = func_no;