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: 13842992 Received: from pv50p00im-hyfv10021501.me.com (pv50p00im-hyfv10021501.me.com [17.58.6.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CD1BF17C64 for ; Sun, 20 Oct 2024 05:28:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=17.58.6.48 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729402136; cv=none; b=VTgU0hDDjXMwjmyMQY9JTuSCVtXirvY9nVbeZaTpMir4LA4wVaNb11HHFlSqIrux+yFD4UlRFLfRMNyXGtxkbrIjanwvc28aZiXwvZ+9DVex9IejhXFOCfIHV5JSuMW2oTZSH7uZxWhHM7A8uxzSeee8c8LAONtTC9b5bKQpnpI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729402136; c=relaxed/simple; bh=yLaDk8wi94a039VFqD35D/AkXGEihK7L1eKOgEgRtOg=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=sRLttXeoezNhz57R+MdksXRNgjONL+Vj373XO0ScKyThplaLdORAxHj1ISQJrg4CIDy2A5x2FuSfBSNJh5gfowYHCZvSk6Wp2DAaf3iyJYJPGGs3FDvqdfJirDU2gxRciakodks/idp+VxewO6/xZMR+O2ZrX3h0vXur9mFQ608= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=icloud.com; spf=pass smtp.mailfrom=icloud.com; dkim=pass (2048-bit key) header.d=icloud.com header.i=@icloud.com header.b=ou5YHP16; arc=none smtp.client-ip=17.58.6.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=icloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=icloud.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=icloud.com header.i=@icloud.com header.b="ou5YHP16" 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() Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 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);