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[209.132.180.67]) by mx.google.com with ESMTP id a47si5736317edc.145.2019.11.25.12.43.53; Mon, 25 Nov 2019 12:44:19 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=prodrive-technologies.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727091AbfKYUkQ (ORCPT + 99 others); Mon, 25 Nov 2019 15:40:16 -0500 Received: from mail.prodrive-technologies.com ([212.61.153.67]:59091 "EHLO mail.prodrive-technologies.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725912AbfKYUkQ (ORCPT ); Mon, 25 Nov 2019 15:40:16 -0500 X-Greylist: delayed 603 seconds by postgrey-1.27 at vger.kernel.org; Mon, 25 Nov 2019 15:40:15 EST Received: from mail.prodrive-technologies.com (localhost.localdomain [127.0.0.1]) by localhost (Email Security Appliance) with SMTP id 3808632EC5_DDC39D3B; Mon, 25 Nov 2019 20:30:11 +0000 (GMT) Received: from mail.prodrive-technologies.com (exc03.bk.prodrive.nl [10.1.1.212]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (Client CN "mail.prodrive-technologies.com", Issuer "Prodrive Technologies B.V. OV SSL Issuing CA" (verified OK)) by mail.prodrive-technologies.com (Sophos Email Appliance) with ESMTPS id 2B2E730563_DDC39D2F; Mon, 25 Nov 2019 20:30:10 +0000 (GMT) Received: from lnxclnt2222.Prodrive.nl (10.13.62.32) by EXC03.bk.prodrive.nl (10.1.1.212) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1779.2; Mon, 25 Nov 2019 21:30:09 +0100 From: Roy van Doormaal To: Brendan Higgins , Benjamin Herrenschmidt , Joel Stanley , Thomas Gleixner , Jason Cooper , Marc Zyngier , Andrew Jeffery , , , , , CC: Roy van Doormaal Subject: [PATCH] irqchip/aspeed-i2c-ic: Fix irq domain name memory leak Date: Mon, 25 Nov 2019 21:29:37 +0100 Message-ID: <20191125202937.23133-1-roy.van.doormaal@prodrive-technologies.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-ClientProxiedBy: EXC03.bk.prodrive.nl (10.1.1.212) To EXC03.bk.prodrive.nl (10.1.1.212) X-SASI-RCODE: 200 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The aspeed irqchip driver overwrites the default irq domain name, but doesn't free the existing domain name. This patch frees the irq domain name before overwriting it. kmemleak trace: unreferenced object 0xb8004c40 (size 64): comm "swapper", pid 0, jiffies 4294937303 (age 747.660s) hex dump (first 32 bytes): 3a 61 68 62 3a 61 70 62 3a 62 75 73 40 31 65 37 :ahb:apb:bus@1e7 38 61 30 30 30 3a 69 6e 74 65 72 72 75 70 74 2d 8a000:interrupt- backtrace: [<086b59b8>] kmemleak_alloc+0xa8/0xc0 [] __kmalloc_track_caller+0x118/0x1a0 [] kvasprintf+0x5c/0xc0 [<49275eec>] kasprintf+0x30/0x50 [<5713064b>] __irq_domain_add+0x184/0x25c [<53c594d0>] aspeed_i2c_ic_of_init+0x9c/0x128 [] of_irq_init+0x1ec/0x314 [] irqchip_init+0x1c/0x24 [<7ef974b3>] init_IRQ+0x30/0x90 [<87a1438f>] start_kernel+0x28c/0x458 [< (null)>] (null) [] 0xffffffff Signed-off-by: Roy van Doormaal --- drivers/irqchip/irq-aspeed-i2c-ic.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/irqchip/irq-aspeed-i2c-ic.c b/drivers/irqchip/irq-aspeed-i2c-ic.c index 8d591c179f81..8081b8483a79 100644 --- a/drivers/irqchip/irq-aspeed-i2c-ic.c +++ b/drivers/irqchip/irq-aspeed-i2c-ic.c @@ -92,6 +92,8 @@ static int __init aspeed_i2c_ic_of_init(struct device_node *node, goto err_iounmap; } + if (i2c_ic->irq_domain->flags & IRQ_DOMAIN_NAME_ALLOCATED) + kfree(i2c_ic->irq_domain->name); i2c_ic->irq_domain->name = "aspeed-i2c-domain"; irq_set_chained_handler_and_data(i2c_ic->parent_irq, -- 2.20.1