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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 3BE7DC43603 for ; Wed, 17 Mar 2021 09:45:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2289264F64 for ; Wed, 17 Mar 2021 09:45:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229962AbhCQJpB (ORCPT ); Wed, 17 Mar 2021 05:45:01 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:13182 "EHLO szxga04-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229660AbhCQJo2 (ORCPT ); Wed, 17 Mar 2021 05:44:28 -0400 Received: from DGGEMS414-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4F0lYN5ng9zmYdw; Wed, 17 Mar 2021 17:42:00 +0800 (CST) Received: from localhost.localdomain (10.67.165.24) by DGGEMS414-HUB.china.huawei.com (10.3.19.214) with Microsoft SMTP Server id 14.3.498.0; Wed, 17 Mar 2021 17:44:13 +0800 From: Qi Liu To: , , , CC: , , Subject: [PATCH 3/3] drivers/perf: convert sysfs sprintf family to sysfs_emit Date: Wed, 17 Mar 2021 17:41:51 +0800 Message-ID: <1615974111-45601-4-git-send-email-liuqi115@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1615974111-45601-1-git-send-email-liuqi115@huawei.com> References: <1615974111-45601-1-git-send-email-liuqi115@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.67.165.24] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org sprintf does not know the PAGE_SIZE maximum of the temporary buffer used for sysfs content and it's possible to overrun the buffer length. Use sysfs_emit() function to ensures that no overrun is done. Signed-off-by: Qi Liu --- drivers/perf/arm_dmc620_pmu.c | 2 +- drivers/perf/arm_smmuv3_pmu.c | 2 +- drivers/perf/fsl_imx8_ddr_perf.c | 4 ++-- drivers/perf/hisilicon/hisi_uncore_pmu.c | 6 +++--- drivers/perf/qcom_l2_pmu.c | 2 +- drivers/perf/qcom_l3_pmu.c | 4 ++-- drivers/perf/thunderx2_pmu.c | 4 ++-- drivers/perf/xgene_pmu.c | 4 ++-- 8 files changed, 14 insertions(+), 14 deletions(-) diff --git a/drivers/perf/arm_dmc620_pmu.c b/drivers/perf/arm_dmc620_pmu.c index 66ad5b3..8e9002a 100644 --- a/drivers/perf/arm_dmc620_pmu.c +++ b/drivers/perf/arm_dmc620_pmu.c @@ -113,7 +113,7 @@ dmc620_pmu_event_show(struct device *dev, eattr = container_of(attr, typeof(*eattr), attr); - return sprintf(page, "event=0x%x,clkdiv2=0x%x\n", eattr->eventid, eattr->clkdiv2); + return sysfs_emit(page, "event=0x%x,clkdiv2=0x%x\n", eattr->eventid, eattr->clkdiv2); } #define DMC620_PMU_EVENT_ATTR(_name, _eventid, _clkdiv2) \ diff --git a/drivers/perf/arm_smmuv3_pmu.c b/drivers/perf/arm_smmuv3_pmu.c index fa9dfbc..45a399f 100644 --- a/drivers/perf/arm_smmuv3_pmu.c +++ b/drivers/perf/arm_smmuv3_pmu.c @@ -506,7 +506,7 @@ static ssize_t smmu_pmu_event_show(struct device *dev, pmu_attr = container_of(attr, struct perf_pmu_events_attr, attr); - return sprintf(page, "event=0x%02llx\n", pmu_attr->id); + return sysfs_emit(page, "event=0x%02llx\n", pmu_attr->id); } #define SMMU_EVENT_ATTR(name, config) \ diff --git a/drivers/perf/fsl_imx8_ddr_perf.c b/drivers/perf/fsl_imx8_ddr_perf.c index c126fd8..2bbb931 100644 --- a/drivers/perf/fsl_imx8_ddr_perf.c +++ b/drivers/perf/fsl_imx8_ddr_perf.c @@ -110,7 +110,7 @@ static ssize_t ddr_perf_identifier_show(struct device *dev, { struct ddr_pmu *pmu = dev_get_drvdata(dev); - return sprintf(page, "%s\n", pmu->devtype_data->identifier); + return sysfs_emit(page, "%s\n", pmu->devtype_data->identifier); } static umode_t ddr_perf_identifier_attr_visible(struct kobject *kobj, @@ -219,7 +219,7 @@ ddr_pmu_event_show(struct device *dev, struct device_attribute *attr, struct perf_pmu_events_attr *pmu_attr; pmu_attr = container_of(attr, struct perf_pmu_events_attr, attr); - return sprintf(page, "event=0x%02llx\n", pmu_attr->id); + return sysfs_emit(page, "event=0x%02llx\n", pmu_attr->id); } #define IMX8_DDR_PMU_EVENT_ATTR(_name, _id) \ diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pmu.c index 64ccf5e..5e2b5e1 100644 --- a/drivers/perf/hisilicon/hisi_uncore_pmu.c +++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c @@ -33,7 +33,7 @@ ssize_t hisi_format_sysfs_show(struct device *dev, eattr = container_of(attr, struct dev_ext_attribute, attr); - return sprintf(buf, "%s\n", (char *)eattr->var); + return sysfs_emit(buf, "%s\n", (char *)eattr->var); } EXPORT_SYMBOL_GPL(hisi_format_sysfs_show); @@ -47,7 +47,7 @@ ssize_t hisi_event_sysfs_show(struct device *dev, eattr = container_of(attr, struct dev_ext_attribute, attr); - return sprintf(page, "config=0x%lx\n", (unsigned long)eattr->var); + return sysfs_emit(page, "config=0x%lx\n", (unsigned long)eattr->var); } EXPORT_SYMBOL_GPL(hisi_event_sysfs_show); @@ -59,7 +59,7 @@ ssize_t hisi_cpumask_sysfs_show(struct device *dev, { struct hisi_pmu *hisi_pmu = to_hisi_pmu(dev_get_drvdata(dev)); - return sprintf(buf, "%d\n", hisi_pmu->on_cpu); + return sysfs_emit(buf, "%d\n", hisi_pmu->on_cpu); } EXPORT_SYMBOL_GPL(hisi_cpumask_sysfs_show); diff --git a/drivers/perf/qcom_l2_pmu.c b/drivers/perf/qcom_l2_pmu.c index 8883af9..fc54a80 100644 --- a/drivers/perf/qcom_l2_pmu.c +++ b/drivers/perf/qcom_l2_pmu.c @@ -676,7 +676,7 @@ static ssize_t l2cache_pmu_event_show(struct device *dev, struct perf_pmu_events_attr *pmu_attr; pmu_attr = container_of(attr, struct perf_pmu_events_attr, attr); - return sprintf(page, "event=0x%02llx\n", pmu_attr->id); + return sysfs_emit(page, "event=0x%02llx\n", pmu_attr->id); } #define L2CACHE_EVENT_ATTR(_name, _id) \ diff --git a/drivers/perf/qcom_l3_pmu.c b/drivers/perf/qcom_l3_pmu.c index fb34b87..bba0780 100644 --- a/drivers/perf/qcom_l3_pmu.c +++ b/drivers/perf/qcom_l3_pmu.c @@ -615,7 +615,7 @@ static ssize_t l3cache_pmu_format_show(struct device *dev, struct dev_ext_attribute *eattr; eattr = container_of(attr, struct dev_ext_attribute, attr); - return sprintf(buf, "%s\n", (char *) eattr->var); + return sysfs_emit(buf, "%s\n", (char *) eattr->var); } #define L3CACHE_PMU_FORMAT_ATTR(_name, _config) \ @@ -643,7 +643,7 @@ static ssize_t l3cache_pmu_event_show(struct device *dev, struct perf_pmu_events_attr *pmu_attr; pmu_attr = container_of(attr, struct perf_pmu_events_attr, attr); - return sprintf(page, "event=0x%02llx\n", pmu_attr->id); + return sysfs_emit(page, "event=0x%02llx\n", pmu_attr->id); } #define L3CACHE_EVENT_ATTR(_name, _id) \ diff --git a/drivers/perf/thunderx2_pmu.c b/drivers/perf/thunderx2_pmu.c index e116815..06a6d56 100644 --- a/drivers/perf/thunderx2_pmu.c +++ b/drivers/perf/thunderx2_pmu.c @@ -128,7 +128,7 @@ __tx2_pmu_##_var##_show(struct device *dev, \ char *page) \ { \ BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \ - return sprintf(page, _format "\n"); \ + return sysfs_emit(page, _format "\n"); \ } \ \ static struct device_attribute format_attr_##_var = \ @@ -176,7 +176,7 @@ static ssize_t tx2_pmu_event_show(struct device *dev, struct dev_ext_attribute *eattr; eattr = container_of(attr, struct dev_ext_attribute, attr); - return sprintf(buf, "event=0x%lx\n", (unsigned long) eattr->var); + return sysfs_emit(buf, "event=0x%lx\n", (unsigned long) eattr->var); } #define TX2_EVENT_ATTR(name, config) \ diff --git a/drivers/perf/xgene_pmu.c b/drivers/perf/xgene_pmu.c index 44faa51..ffe3bde 100644 --- a/drivers/perf/xgene_pmu.c +++ b/drivers/perf/xgene_pmu.c @@ -170,7 +170,7 @@ static ssize_t xgene_pmu_format_show(struct device *dev, struct dev_ext_attribute *eattr; eattr = container_of(attr, struct dev_ext_attribute, attr); - return sprintf(buf, "%s\n", (char *) eattr->var); + return sysfs_emit(buf, "%s\n", (char *) eattr->var); } #define XGENE_PMU_FORMAT_ATTR(_name, _config) \ @@ -281,7 +281,7 @@ static ssize_t xgene_pmu_event_show(struct device *dev, struct dev_ext_attribute *eattr; eattr = container_of(attr, struct dev_ext_attribute, attr); - return sprintf(buf, "config=0x%lx\n", (unsigned long) eattr->var); + return sysfs_emit(buf, "config=0x%lx\n", (unsigned long) eattr->var); } #define XGENE_PMU_EVENT_ATTR(_name, _config) \ -- 2.8.1