From patchwork Sun Oct 20 05:27:50 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zijun Hu X-Patchwork-Id: 13842985 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C260ED3C934 for ; Sun, 20 Oct 2024 05:28:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=OMfPu6OONn3WfGSgjttAs/X4eb13kLSlXq2trcGSTck=; b=ssMwfZyoSSZ3Ch kdiZ80sM7ZfiQIPlA+oXMOWEaJoEwjlGB2Sbe6u/fNYJG038U/p4L7LY+f0KbNDcerflemrs1fAXg DDvqOroSkpXBPPZmPkCKHgfBNjtFHvNMQBmnP1D72gdwuEtDgfc5/cPWUe5P4yXSNLIIJiBUfZzUm jMtXlDHnfU5BjawfMtJY752AoFk8M46mHpLp4zkzofD/S3tQsLe582NXXW2fizywfqMXBkhCkAmGH dl8ivpbT6zgbWtToPXdt2blmOZuVFDVAFGVzFnduWwhPsPn6oWHKBe/1neOdSeAFXk0wDXHWBj8FR pYYncCvpRf/ia/sAbADw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1t2OUr-00000004Rsl-0bzF; Sun, 20 Oct 2024 05:28:57 +0000 Received: from pv50p00im-hyfv10021501.me.com ([17.58.6.48]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1t2OUp-00000004Rra-05a1 for linux-phy@lists.infradead.org; Sun, 20 Oct 2024 05:28:56 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=icloud.com; s=1a1hai; t=1729402134; bh=rVON13sMMqtKSwCrl4E1Uhkm6hLNfvRtGi981NVB7Gs=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To; b=ou5YHP16ry9CgCybtpG62r35ZB2cpiklwmT1he10nlofB7CO0oQAY7P6knGVfStrr yBHd4FL3CbryCTpHZiGvlUqpAwIJuCz1SGhnCSMegnb0s4chbCotaXY5qCM7iwVsNm x9gTXClBdLxoOSTIa/hsOwn5k/IFUpuhe8+O84o2bpcvE9ZNYahhHOm/NMzj5flyGg Gu69Wosh8q8FpXgoaGr5LnQQpxlJcHOliGHy+88OWLHps3KIDYPV0MJ8y0AbgpBwuY p4f0Qq0jSPQ1Ae9OWaKCljqZAv3IVssLla7cnWNzd4dazBw8+ni3tVqzaGCfj3xMCd fj92LWGujUoww== Received: from [192.168.1.26] (pv50p00im-dlb-asmtp-mailmevip.me.com [17.56.9.10]) by pv50p00im-hyfv10021501.me.com (Postfix) with ESMTPSA id CD6C22C0130; Sun, 20 Oct 2024 05:28:48 +0000 (UTC) From: Zijun Hu Date: Sun, 20 Oct 2024 13:27:50 +0800 Subject: [PATCH 5/6] phy: core: Add missing of_node_put() in of_phy_provider_lookup() MIME-Version: 1.0 Message-Id: <20241020-phy_core_fix-v1-5-078062f7da71@quicinc.com> References: <20241020-phy_core_fix-v1-0-078062f7da71@quicinc.com> In-Reply-To: <20241020-phy_core_fix-v1-0-078062f7da71@quicinc.com> To: Vinod Koul , Kishon Vijay Abraham I , Felipe Balbi , Greg Kroah-Hartman , Rob Herring , Arnd Bergmann , Lee Jones Cc: Zijun Hu , stable@vger.kernel.org, linux-phy@lists.infradead.org, netdev@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Zijun Hu X-Mailer: b4 0.14.1 X-Proofpoint-ORIG-GUID: hKZD5y-4RY3sylApKTy1YAx6Oj9Jx6jl X-Proofpoint-GUID: hKZD5y-4RY3sylApKTy1YAx6Oj9Jx6jl X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1051,Hydra:6.0.680,FMLib:17.12.62.30 definitions=2024-10-20_02,2024-10-17_01,2024-09-30_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 clxscore=1015 spamscore=0 malwarescore=0 phishscore=0 mlxscore=0 adultscore=0 bulkscore=0 mlxlogscore=999 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2308100000 definitions=main-2410200032 X-Apple-Remote-Links: v=1;h=KCk=;charset=UTF-8 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241019_222855_114819_53256621 X-CRM114-Status: GOOD ( 11.16 ) X-BeenThere: linux-phy@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux Phy Mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org From: Zijun Hu The for_each_child_of_node() macro automatically decrements the child refcount at the end of every iteration. On early exits, of_node_put() must be used to manually decrement the refcount and avoid memory leaks. The macro called by of_phy_provider_lookup() has such early exit, but it does not call of_node_put() before early exit. Fixed by adding missing of_node_put() in of_phy_provider_lookup(). Fixes: 2a4c37016ca9 ("phy: core: Fix of_phy_provider_lookup to return PHY provider for sub node") Cc: stable@vger.kernel.org Signed-off-by: Zijun Hu --- The impact of this change is wide since of_phy_provider_lookup() is indirectly called by APIs phy_get(), of_phy_get(), and devm_of_phy_get_by_index(). The following kernel mainline commit has similar fix: Commit: b337cc3ce475 ("backlight: lm3509_bl: Fix early returns in for_each_child_of_node()") --- drivers/phy/phy-core.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c index 967878b78797..24bd619a33dd 100644 --- a/drivers/phy/phy-core.c +++ b/drivers/phy/phy-core.c @@ -143,10 +143,11 @@ static struct phy_provider *of_phy_provider_lookup(struct device_node *node) list_for_each_entry(phy_provider, &phy_provider_list, list) { if (phy_provider->dev->of_node == node) return phy_provider; - for_each_child_of_node(phy_provider->children, child) - if (child == node) + if (child == node) { + of_node_put(child); return phy_provider; + } } return ERR_PTR(-EPROBE_DEFER);