From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 36CC11E834D; Thu, 17 Apr 2025 18:55:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744916147; cv=none; b=b4rvBEJZ/90gMTTsQlcz8TnW5/lT6uSBvMEgH/54fS0uxeDrmpUpmuhK77PxtLgd7+AM/ANIufLAiiED9NNUco42IJulguIkni2bpR9uaWaMC5ghP2imxAg8RBAilYBbJMk0QL12yqqrUcGx+yhHdyZu31HXketIj2MZicl7cwU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744916147; c=relaxed/simple; bh=2wCuIWZsi7BWt3+4fMSNaABqW90ncgbo+gAm2yEqHCY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=j0xxqsIJigHMRx6XLzFh+rqlrcHZMw8nX468FusNHRSWJDB+nwReAjKj9os9tPyfGjCAVpLkRkahLv/kfK7shzfLSZmDRu/K+JwCEkmZiGxZccTa0Ma/mzzHKr5yik555DBgCMfIzubseLsgm/MJ6CWpU/QyBaHbtu+zumESu6I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=PbQwYBsk; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="PbQwYBsk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BE2B5C4CEE4; Thu, 17 Apr 2025 18:55:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1744916147; bh=2wCuIWZsi7BWt3+4fMSNaABqW90ncgbo+gAm2yEqHCY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PbQwYBskxx1Yp15i+aF+TMI/AcQWJdKSRLM0h8hF7Se4k+KwTmiXjifmJ5C9sqDYM EzMU9SDOakGX2oDTaeh9Rsw+QgTtETz4KRPNJSt3r/OKVQUE2bGr9zeCvUUyWEmpNC oxIx0OCiYIXNrq9BTvg7dw6qgll34Lo3Jvtcr5Jk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Zijun Hu , "Rob Herring (Arm)" Subject: [PATCH 6.12 359/393] of/irq: Fix device node refcount leakages in of_irq_count() Date: Thu, 17 Apr 2025 19:52:48 +0200 Message-ID: <20250417175122.037739385@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250417175107.546547190@linuxfoundation.org> References: <20250417175107.546547190@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Zijun Hu commit bbf71f44aaf241d853759a71de7e7ebcdb89be3d upstream. of_irq_count() invokes of_irq_parse_one() to count IRQs, and successful invocation of the later will get device node @irq.np refcount, but the former does not put the refcount before next iteration invocation, hence causes device node refcount leakages. Fix by putting @irq.np refcount before the next iteration invocation. Fixes: 3da5278727a8 ("of/irq: Rework of_irq_count()") Cc: stable@vger.kernel.org Signed-off-by: Zijun Hu Link: https://lore.kernel.org/r/20250209-of_irq_fix-v2-5-93e3a2659aa7@quicinc.com Signed-off-by: Rob Herring (Arm) Signed-off-by: Greg Kroah-Hartman --- drivers/of/irq.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/of/irq.c +++ b/drivers/of/irq.c @@ -508,8 +508,10 @@ int of_irq_count(struct device_node *dev struct of_phandle_args irq; int nr = 0; - while (of_irq_parse_one(dev, nr, &irq) == 0) + while (of_irq_parse_one(dev, nr, &irq) == 0) { + of_node_put(irq.np); nr++; + } return nr; }