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=-10.1 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,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 016BEFC6194 for ; Fri, 8 Nov 2019 12:07:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C9BFE215EA for ; Fri, 8 Nov 2019 12:07:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573214860; bh=zgtQn59xKSHLgHf3t2ThmqyQQy/k5Hd9egH/wHnXQc4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=HkJ3XJqkIRKvlsZp75HNvdOho56sX0ykoy3iuRAaT2FWU1Iaih0JXKEx2gocWivMC /uk1GYNWWoE0RPfzwaZx0ZmTC6suzMv2yp1dLFc/+2Os70Sg2cAbTGnP0LX3zxGOls D+9WJIKaZsFDr+0yMw9PoJIkBSi0hgJvzH/4K7A4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391602AbfKHMHj (ORCPT ); Fri, 8 Nov 2019 07:07:39 -0500 Received: from mail.kernel.org ([198.145.29.99]:53802 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732382AbfKHLku (ORCPT ); Fri, 8 Nov 2019 06:40:50 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (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 A168521D7E; Fri, 8 Nov 2019 11:40:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573213249; bh=zgtQn59xKSHLgHf3t2ThmqyQQy/k5Hd9egH/wHnXQc4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0iLX8P4p3Uc0jtDTOUntuGCZghvtYLu/qRo1HuHDfwlbIRBOU7CJV/Ndle2o57FcJ P+brYzKHvLz/9XUxGzMRT1YFHN0kWIi3PSrYxfLqriqsRoIrWWbwwRbFRaOr8XstZ6 Lwtr5+LA1SdxrxGJwjLVStNdnXNU7uJznPJcCO8Q= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Sudeep Holla , Olof Johansson , Sasha Levin , linux-arm-kernel@lists.infradead.org Subject: [PATCH AUTOSEL 4.19 116/205] firmware: arm_scmi: use strlcpy to ensure NULL-terminated strings Date: Fri, 8 Nov 2019 06:36:23 -0500 Message-Id: <20191108113752.12502-116-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191108113752.12502-1-sashal@kernel.org> References: <20191108113752.12502-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sudeep Holla [ Upstream commit ca64b719a1e665ac7449b6a968059176af7365a8 ] Replace all the memcpy() for copying name strings from the firmware with strlcpy() to make sure we are bounded by the source buffer size and we also always have NULL-terminated strings. This is needed to avoid out of bounds accesses if the firmware returns a non-terminated string. Reported-by: Olof Johansson Acked-by: Olof Johansson Signed-off-by: Sudeep Holla Signed-off-by: Sasha Levin --- drivers/firmware/arm_scmi/base.c | 2 +- drivers/firmware/arm_scmi/clock.c | 2 +- drivers/firmware/arm_scmi/perf.c | 2 +- drivers/firmware/arm_scmi/power.c | 2 +- drivers/firmware/arm_scmi/sensors.c | 2 +- 5 files changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/firmware/arm_scmi/base.c b/drivers/firmware/arm_scmi/base.c index 9dff33ea6416f..204390297f4bd 100644 --- a/drivers/firmware/arm_scmi/base.c +++ b/drivers/firmware/arm_scmi/base.c @@ -208,7 +208,7 @@ static int scmi_base_discover_agent_get(const struct scmi_handle *handle, ret = scmi_do_xfer(handle, t); if (!ret) - memcpy(name, t->rx.buf, SCMI_MAX_STR_SIZE); + strlcpy(name, t->rx.buf, SCMI_MAX_STR_SIZE); scmi_xfer_put(handle, t); diff --git a/drivers/firmware/arm_scmi/clock.c b/drivers/firmware/arm_scmi/clock.c index e4119eb34986c..30fc04e284312 100644 --- a/drivers/firmware/arm_scmi/clock.c +++ b/drivers/firmware/arm_scmi/clock.c @@ -111,7 +111,7 @@ static int scmi_clock_attributes_get(const struct scmi_handle *handle, ret = scmi_do_xfer(handle, t); if (!ret) - memcpy(clk->name, attr->name, SCMI_MAX_STR_SIZE); + strlcpy(clk->name, attr->name, SCMI_MAX_STR_SIZE); else clk->name[0] = '\0'; diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c index 64342944d9175..87c99d296ecd3 100644 --- a/drivers/firmware/arm_scmi/perf.c +++ b/drivers/firmware/arm_scmi/perf.c @@ -174,7 +174,7 @@ scmi_perf_domain_attributes_get(const struct scmi_handle *handle, u32 domain, dom_info->mult_factor = (dom_info->sustained_freq_khz * 1000) / dom_info->sustained_perf_level; - memcpy(dom_info->name, attr->name, SCMI_MAX_STR_SIZE); + strlcpy(dom_info->name, attr->name, SCMI_MAX_STR_SIZE); } scmi_xfer_put(handle, t); diff --git a/drivers/firmware/arm_scmi/power.c b/drivers/firmware/arm_scmi/power.c index cfa033b05aed5..62f3401a1f01e 100644 --- a/drivers/firmware/arm_scmi/power.c +++ b/drivers/firmware/arm_scmi/power.c @@ -106,7 +106,7 @@ scmi_power_domain_attributes_get(const struct scmi_handle *handle, u32 domain, dom_info->state_set_notify = SUPPORTS_STATE_SET_NOTIFY(flags); dom_info->state_set_async = SUPPORTS_STATE_SET_ASYNC(flags); dom_info->state_set_sync = SUPPORTS_STATE_SET_SYNC(flags); - memcpy(dom_info->name, attr->name, SCMI_MAX_STR_SIZE); + strlcpy(dom_info->name, attr->name, SCMI_MAX_STR_SIZE); } scmi_xfer_put(handle, t); diff --git a/drivers/firmware/arm_scmi/sensors.c b/drivers/firmware/arm_scmi/sensors.c index 27f2092b9882a..b53d5cc9c9f6c 100644 --- a/drivers/firmware/arm_scmi/sensors.c +++ b/drivers/firmware/arm_scmi/sensors.c @@ -140,7 +140,7 @@ static int scmi_sensor_description_get(const struct scmi_handle *handle, s = &si->sensors[desc_index + cnt]; s->id = le32_to_cpu(buf->desc[cnt].id); s->type = SENSOR_TYPE(attrh); - memcpy(s->name, buf->desc[cnt].name, SCMI_MAX_STR_SIZE); + strlcpy(s->name, buf->desc[cnt].name, SCMI_MAX_STR_SIZE); } desc_index += num_returned; -- 2.20.1