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([178.197.215.209]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-36e4cfeef76sm13482263f8f.59.2024.08.14.12.58.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Aug 2024 12:58:27 -0700 (PDT) From: Krzysztof Kozlowski To: "Rafael J. Wysocki" , Daniel Lezcano , Zhang Rui , Lukasz Luba , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Krzysztof Kozlowski , stable@vger.kernel.org Subject: [PATCH 1/3] thermal: of: Fix OF node leak in thermal_of_trips_init() error path Date: Wed, 14 Aug 2024 21:58:21 +0200 Message-ID: <20240814195823.437597-1-krzysztof.kozlowski@linaro.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Terminating for_each_child_of_node() loop requires dropping OF node reference, so bailing out after thermal_of_populate_trip() error misses this. Solve the OF node reference leak with scoped for_each_child_of_node_scoped(). Fixes: d0c75fa2c17f ("thermal/of: Initialize trip points separately") Cc: Signed-off-by: Krzysztof Kozlowski Reviewed-by: Chen-Yu Tsai Reviewed-by: Chen-Yu Tsai Reviewed-by: Daniel Lezcano --- drivers/thermal/thermal_of.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c index aa34b6e82e26..30f8d6e70484 100644 --- a/drivers/thermal/thermal_of.c +++ b/drivers/thermal/thermal_of.c @@ -125,7 +125,7 @@ static int thermal_of_populate_trip(struct device_node *np, static struct thermal_trip *thermal_of_trips_init(struct device_node *np, int *ntrips) { struct thermal_trip *tt; - struct device_node *trips, *trip; + struct device_node *trips; int ret, count; trips = of_get_child_by_name(np, "trips"); @@ -150,7 +150,7 @@ static struct thermal_trip *thermal_of_trips_init(struct device_node *np, int *n *ntrips = count; count = 0; - for_each_child_of_node(trips, trip) { + for_each_child_of_node_scoped(trips, trip) { ret = thermal_of_populate_trip(trip, &tt[count++]); if (ret) goto out_kfree; From patchwork Wed Aug 14 19:58:22 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 819982 Received: from mail-wr1-f52.google.com (mail-wr1-f52.google.com [209.85.221.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0A2951BF30F for ; Wed, 14 Aug 2024 19:58:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.52 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723665512; cv=none; b=bTrWQMEXVjeMZncxWKjLJPtHMPyjqk4ZwIcWPFLEmhc2ebxqpluGAVqc+DoMKHVkJ+yw4rdITn5N1Hqwendm4MHQ6UuJIyTZjvdhr4VscmaHgh2U35WJWoqUK5+YjLUrpnv68XRgiQUZysNDstmoNldFnfsdVCGI88aDwuAUcig= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723665512; c=relaxed/simple; bh=DrwiAoxoyEqBFQNKyiASdBbPbGDrpRDECmNJiSspMII=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=QnQNmxojoCilEvGuXSV9p5vryTjOnJPsECmWGroeL3eeuJM0OWUXAoTLdirc/NItuXpRKMh8/Jw1SrwwD5kmd1Y2tPThXNu3m1u9HWkBKw4daQTTBpDAQNsFljGkSothGnZQtadMyufaUKBilsIlqq5SB2BxiZzOB/Q315bwvds= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=lo/7IS+e; arc=none smtp.client-ip=209.85.221.52 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="lo/7IS+e" Received: by mail-wr1-f52.google.com with SMTP id ffacd0b85a97d-3687ea0521cso160527f8f.1 for ; Wed, 14 Aug 2024 12:58:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1723665509; x=1724270309; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Cb257pBqZhP6UYLMmFTbQ8fmxgCfB52QrCQL5eJC8t4=; b=lo/7IS+ey3auZSvDTSEb9NhSRN8yGfx0CVjtG4SKmKZ8W6r6XQNu5suG7g6u3/CrwW 5/HIGUctPpX8SKRjxLSGAF3FWYfbQzGCy+vFpll9WchS7tdOrYU5/fJsbA0rqxNrPLXM C5PI6BVuITA/chhTXiBmjBEaKmEpJKsDA2CYrQGpUwQ3VdVxEcJu5vGmP4PWBK3OcVa0 TEvL3iU76aMx7QvmJ++zdnv+xlFrrUtjwusZowOSAOTDYIh/4cgX9tjCkXl6GX5KFAtt lruq7iZE3BgY3zO3Mq1Urct5Hj094ZXY5yXgI/ls3mbd2CPR1bhVvPlwyHHiUqC39Xb2 /eYw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1723665509; x=1724270309; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Cb257pBqZhP6UYLMmFTbQ8fmxgCfB52QrCQL5eJC8t4=; b=E3pyCVaZwV/PsN3sXLPKje1gyPr4Y9BrvVfYvj/mfwMPCZncAIMickJvGBFrkQ8Q9r Kb6BJxcjvFvSwp/0nl++VexwSuXew6XBKic1L5P3hNezbYS7huvegI6sRnFBnAQHdXhT 0pFVW6Bgz8nO6B6Fv32QwZGkAl1R+Z9OkboeigGzyW9IkUT6l2vqHrtYaQRTfly/0crq CvDX98G68XfQsAIlWqFUy5iQ1aXDLKCWjI8ECq5Mh+147HKo6vEEvbSm1Pdw/wZu6mA0 S8E5jwiG7PTqfmxjI2RyvMXMH63jgAONPT5NYT0ZXRsZLwHXuAWxjVD6phHttUOizkp6 Yscg== X-Forwarded-Encrypted: i=1; AJvYcCW9KTBw70xmSHhDBJnUK9GweiVtvNQy6AtWyhYaEYkaaAO1HEt5KwBRgcrW7GEilU9L8sAP9EN/YWF2afMg/tXD/tHD0vjLIJw= X-Gm-Message-State: AOJu0YyrYuJ+LlfSF039d+lbmzfTLESnAzqZG475rw57o5Qtcb6EXpId HYLdRxU1dXqGty0HVxW7HsNVZ8Do6VI7Q85mi1C2j0tSS9K4Anrh2gbyLr61uRY= X-Google-Smtp-Source: AGHT+IG88V2hU+EgJ7Lr0puPbxnLdAZ2m99QYLzaH5h8aG7w+H+SP6z/ChwWFYdSv8IxFj+SArDOkg== X-Received: by 2002:a5d:4ad0:0:b0:368:6606:bd01 with SMTP id ffacd0b85a97d-371777fe399mr3092052f8f.55.1723665509278; Wed, 14 Aug 2024 12:58:29 -0700 (PDT) Received: from krzk-bin.. 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Wysocki" , Daniel Lezcano , Zhang Rui , Lukasz Luba , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Krzysztof Kozlowski , stable@vger.kernel.org Subject: [PATCH 2/3] thermal: of: Fix OF node leak in thermal_of_zone_register() Date: Wed, 14 Aug 2024 21:58:22 +0200 Message-ID: <20240814195823.437597-2-krzysztof.kozlowski@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240814195823.437597-1-krzysztof.kozlowski@linaro.org> References: <20240814195823.437597-1-krzysztof.kozlowski@linaro.org> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 thermal_of_zone_register() calls of_thermal_zone_find() which will iterate over OF nodes with for_each_available_child_of_node() to find matching thermal zone node. When it finds such, it exits the loop and returns the node. Prematurely ending for_each_available_child_of_node() loops requires dropping OF node reference, thus success of of_thermal_zone_find() means that caller must drop the reference. Fixes: 3fd6d6e2b4e8 ("thermal/of: Rework the thermal device tree initialization") Cc: Signed-off-by: Krzysztof Kozlowski Reviewed-by: Daniel Lezcano --- drivers/thermal/thermal_of.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c index 30f8d6e70484..b08a9b64718d 100644 --- a/drivers/thermal/thermal_of.c +++ b/drivers/thermal/thermal_of.c @@ -491,7 +491,8 @@ static struct thermal_zone_device *thermal_of_zone_register(struct device_node * trips = thermal_of_trips_init(np, &ntrips); if (IS_ERR(trips)) { pr_err("Failed to find trip points for %pOFn id=%d\n", sensor, id); - return ERR_CAST(trips); + ret = PTR_ERR(trips); + goto out_of_node_put; } ret = thermal_of_monitor_init(np, &delay, &pdelay); @@ -519,6 +520,7 @@ static struct thermal_zone_device *thermal_of_zone_register(struct device_node * goto out_kfree_trips; } + of_node_put(np); kfree(trips); ret = thermal_zone_device_enable(tz); @@ -533,6 +535,8 @@ static struct thermal_zone_device *thermal_of_zone_register(struct device_node * out_kfree_trips: kfree(trips); 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([178.197.215.209]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-36e4cfeef76sm13482263f8f.59.2024.08.14.12.58.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Aug 2024 12:58:30 -0700 (PDT) From: Krzysztof Kozlowski To: "Rafael J. Wysocki" , Daniel Lezcano , Zhang Rui , Lukasz Luba , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Krzysztof Kozlowski , stable@vger.kernel.org Subject: [PATCH 3/3] thermal: of: Fix OF node leak in of_thermal_zone_find() error paths Date: Wed, 14 Aug 2024 21:58:23 +0200 Message-ID: <20240814195823.437597-3-krzysztof.kozlowski@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240814195823.437597-1-krzysztof.kozlowski@linaro.org> References: <20240814195823.437597-1-krzysztof.kozlowski@linaro.org> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Terminating for_each_available_child_of_node() loop requires dropping OF node reference, so bailing out on errors misses this. Solve the OF node reference leak with scoped for_each_available_child_of_node_scoped(). Fixes: 3fd6d6e2b4e8 ("thermal/of: Rework the thermal device tree initialization") Cc: Signed-off-by: Krzysztof Kozlowski Reviewed-by: Chen-Yu Tsai Reviewed-by: Daniel Lezcano --- drivers/thermal/thermal_of.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c index b08a9b64718d..1f252692815a 100644 --- a/drivers/thermal/thermal_of.c +++ b/drivers/thermal/thermal_of.c @@ -184,14 +184,14 @@ static struct device_node *of_thermal_zone_find(struct device_node *sensor, int * Search for each thermal zone, a defined sensor * corresponding to the one passed as parameter */ - for_each_available_child_of_node(np, tz) { + for_each_available_child_of_node_scoped(np, child) { int count, i; - count = of_count_phandle_with_args(tz, "thermal-sensors", + count = of_count_phandle_with_args(child, "thermal-sensors", "#thermal-sensor-cells"); if (count <= 0) { - pr_err("%pOFn: missing thermal sensor\n", tz); + pr_err("%pOFn: missing thermal sensor\n", child); tz = ERR_PTR(-EINVAL); goto out; } @@ -200,18 +200,19 @@ static struct device_node *of_thermal_zone_find(struct device_node *sensor, int int ret; - ret = of_parse_phandle_with_args(tz, "thermal-sensors", + ret = of_parse_phandle_with_args(child, "thermal-sensors", "#thermal-sensor-cells", i, &sensor_specs); if (ret < 0) { - pr_err("%pOFn: Failed to read thermal-sensors cells: %d\n", tz, ret); + pr_err("%pOFn: Failed to read thermal-sensors cells: %d\n", child, ret); tz = ERR_PTR(ret); goto out; } if ((sensor == sensor_specs.np) && id == (sensor_specs.args_count ? sensor_specs.args[0] : 0)) { - pr_debug("sensor %pOFn id=%d belongs to %pOFn\n", sensor, id, tz); + pr_debug("sensor %pOFn id=%d belongs to %pOFn\n", sensor, id, child); + tz = no_free_ptr(child); goto out; } }