From nobody Fri May 3 09:45:24 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1600063322; cv=none; d=zohomail.com; s=zohoarc; b=J00g6PFd2pxOFmK7DWIYyHsdsc/xHml04aWuE2vyL/MtSPgShXogAk/i73jITm+yt9SfAPaZMBbS+YPjnWlT286MIrNBGoSxlq9WdUDThrdupYyo+ZOH/ds5UOouUMqKuHonieyFk0Bt014F1jyi0m/U+3ah7AhId2950lPwNVE= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1600063322; h=Content-Transfer-Encoding:Cc:Date:From:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Sender:Subject:To; bh=nP3Eugv5dluo/FXEPi0IxHvQJaTGM74RNS4Iyd5n0q4=; b=oB7TO44PQCJ1i0miBWdmIiugw46pGbwqmtan4KPtDUyCAjNS1fCwvtGOjtQg2LL6BDnXjSVv/ZQOnjJIFAMfohJ1QBNQrWB0zruX1Ho7ldAyCAWGDXvvzf4bMHGZGFFDUuoHsdN/qzAD3zEdEttlpfUsg8erKzYbHCombPgUH84= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 16000633221622.905261645921314; Sun, 13 Sep 2020 23:02:02 -0700 (PDT) Received: from localhost ([::1]:47270 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kHhYu-0001FB-Dv for importer@patchew.org; Mon, 14 Sep 2020 02:02:00 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:35756) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kHhYE-0000oz-LT for qemu-devel@nongnu.org; Mon, 14 Sep 2020 02:01:18 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:45558) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kHhYC-0001hF-I6 for qemu-devel@nongnu.org; Mon, 14 Sep 2020 02:01:18 -0400 Received: from pps.filterd (m0098394.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 08E5VrA8016541 for ; Mon, 14 Sep 2020 02:01:12 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 33j2830tks-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 14 Sep 2020 02:01:12 -0400 Received: from m0098394.ppops.net (m0098394.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 08E5rCTX128205 for ; Mon, 14 Sep 2020 02:01:12 -0400 Received: from ppma01dal.us.ibm.com (83.d6.3fa9.ip4.static.sl-reverse.com [169.63.214.131]) by mx0a-001b2d01.pphosted.com with ESMTP id 33j2830tkb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 14 Sep 2020 02:01:12 -0400 Received: from pps.filterd (ppma01dal.us.ibm.com [127.0.0.1]) by ppma01dal.us.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 08E5wCC7030225; Mon, 14 Sep 2020 06:01:11 GMT Received: from b03cxnp07029.gho.boulder.ibm.com (b03cxnp07029.gho.boulder.ibm.com [9.17.130.16]) by ppma01dal.us.ibm.com with ESMTP id 33gny8rx49-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 14 Sep 2020 06:01:11 +0000 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 08E61AfQ65143054 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 14 Sep 2020 06:01:10 GMT Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E3C7F136055; Mon, 14 Sep 2020 06:01:09 +0000 (GMT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id AC74B13605D; Mon, 14 Sep 2020 06:01:09 +0000 (GMT) Received: from amdrome1.watson.ibm.com (unknown [9.2.130.16]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTP; Mon, 14 Sep 2020 06:01:09 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding; s=pp1; bh=nP3Eugv5dluo/FXEPi0IxHvQJaTGM74RNS4Iyd5n0q4=; b=aa3NXd+WdEnetyPfs0bZu7K48cvIn6bCRZGuqWlOQKXkFuvhflu4wlklGBIOQnTXUwpU UbfvnV/1mDB8PBIxWUjg0HDvseoyZrHuH1UIk4VAhp2O/h3Y3wO6pwNvnWcIjTiWJM+F mDMUtpoBK+U9uhinsuYW7hDj//XipoQqtqUcdeuEWgh6i4MzEv3OVhvOgKAUGUejkevL nABGHiw5IzuJLpXV/fkQGG3zcNQLg1GSgRKcaNT2hLCaTeK4kfwlK7aPdaW/No/OQDYU qbzK8wETHivsukNp5vRZXReNOh0tBw/ZIGG0p1KUxZYlavweu5ZIkhK2v9b7dlqiOTjd kQ== From: Dov Murik To: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , qemu-devel@nongnu.org Subject: [PATCH] checkpatch: Detect '%#' or '%0#' in printf-style format strings Date: Mon, 14 Sep 2020 06:01:09 +0000 Message-Id: <20200914060109.69583-1-dovmurik@linux.vnet.ibm.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.687 definitions=2020-09-13_09:2020-09-10, 2020-09-13 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 adultscore=0 suspectscore=0 phishscore=0 lowpriorityscore=0 malwarescore=0 impostorscore=0 clxscore=1015 mlxlogscore=999 bulkscore=0 spamscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2009140045 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: none client-ip=148.163.156.1; envelope-from=dovmurik@linux.vnet.ibm.com; helo=mx0a-001b2d01.pphosted.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/14 02:01:13 X-ACL-Warn: Detected OS = Linux 3.x [generic] [fuzzy] X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Dov Murik Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @ibm.com) Content-Type: text/plain; charset="utf-8" According to the coding style document, we should use literal '0x' prefix instead of printf's '#' flag (which appears as '%#' or '%0#' in the format string). Add a checkpatch rule to enforce that. Note that checkpatch already had a similar rule for trace-events files. Example usage: $ scripts/checkpatch.pl --file chardev/baum.c ... ERROR: Don't use '#' flag of printf format ('%#') in format strings, use = '0x' prefix instead #366: FILE: chardev/baum.c:366: + DPRINTF("Broken packet %#2x, tossing\n", req); \ ... ERROR: Don't use '#' flag of printf format ('%#') in format strings, use = '0x' prefix instead #472: FILE: chardev/baum.c:472: + DPRINTF("unrecognized request %0#2x\n", req); ... Signed-off-by: Dov Murik --- scripts/checkpatch.pl | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index bd3faa154c..6ec2a9f6a1 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -2891,6 +2891,18 @@ sub process { } } =20 +# check for %# or %0# in printf-style format strings + while ($line =3D~ /(?:^|")([X\t]*)(?:"|$)/g) { + my $string =3D substr($rawline, $-[1], $+[1] - $-[1]); + $string =3D~ s/%%/__/g; + if ($string =3D~ /(?