From nobody Fri Sep 25 02:09:39 2026 Received: from cstnet.cn (smtp25.cstnet.cn [159.226.251.25]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 927CE4D9558; Thu, 17 Sep 2026 13:32:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.25 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789651977; cv=none; b=Ky1S/BEPDMmIVSirWyYTu1/rY2crRmxgPV7bp25V8ICpboELi6YN/rauQC9IY6WuEyA9+pgCh9m52oaFQ6A91GFdHuNn3WSz/RRiAqoB8bcrP0+LLNIEfqH83WDM8RA3JMaqp/TMoUJVga3WRghVPoh7JePFbBvNLP49D5IFsx8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789651977; c=relaxed/simple; bh=vRIf4V6xqwIk3HxmxkIO2Qe26JzbgFlDeqoZmxc6ink=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=KH8yhl4oy4/pUB9wOvywOeZF97s2fP+avWe9WmU6MbyDIL6oiFUzGSor1zI0vWhjxzqYQ9gbgWaUz0+faRVeR8QRd4toMMCfRBK+oEUrNu6r8TSlbumiuvpXwfxyqKoPEkeOec/zmH0bWQM3ERnd0NhSlyg3nsbRAwv38z9tv5w= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.25 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from dfae2b116770.home.arpa (unknown [36.110.52.2]) by APP-05 (Coremail) with SMTP id zQCowACXADv566tqtIeBCA--.3671S2; Thu, 17 Sep 2026 21:32:41 +0800 (CST) From: Wentao Liang To: cuiyunhui@bytedance.com Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, mark.rutland@arm.com, renyu.zj@linux.alibaba.com, will@kernel.org, xueshuai@linux.alibaba.com, Wentao Liang , stable@vger.kernel.org Subject: [PATCH] perf/dwc_pcie: Fix PCI device reference leak in dwc_pcie_pmu_probe() Date: Thu, 17 Sep 2026 13:32:41 +0000 Message-Id: <20260917133241.2153478-1-vulab@iscas.ac.cn> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: zQCowACXADv566tqtIeBCA--.3671S2 X-Coremail-Antispam: 1UD129KBjvdXoWrtF17JrW5tFyxAFW7KryrCrg_yoWDKrg_Ga 4xua9rX34DCFnFyF1jyFy3ZryfA3srZa4xWFn7ta1aqrZFvF1rAr9F9r95AF47Wws5Gry8 tw1DWr43ZrW3ujkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbg8YjsxI4VWkKwAYFVCjjxCrM7CY07I20VC2zVCF04k26cxKx2IY s7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4 kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_ Cr0_Gr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26r xl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj 6xIIjxv20xvE14v26r1q6rW5McIj6I8E87Iv67AKxVWxJr0_GcWlOx8S6xCaFVCjc4AY6r 1j6r4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq62Iq12xI8VA0II8E6IAqYI8I648v4I1lFIxG xcIEc7CjxVA2Y2ka0xkIwI1lc7CjxVAaw2AFwI0_Jw0_GFyl42xK82IYc2Ij64vIr41l42 xK82IY6x8ErcxFaVAv8VW8GFyrJr1UJwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02 F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GF ylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUCVW8JwCI42IY6xIIjxv20xvEc7Cj xVAFwI0_Cr0_Gr1UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxV W8Jr0_Cr1UMIIF0xvEx4A2jsIEc7CjxVAFwI0_GcCE3sUvcSsGvfC2KfnxnUUI43ZEXa7I U5o5l5UUUUU== X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiDAANA2qrrJrB-wAAsL Content-Type: text/plain; charset="utf-8" dwc_pcie_pmu_probe() gets a reference to the PCI device with pci_get_domain_bus_and_slot(), but returns -ENODEV directly when dwc_pcie_des_cap() does not find the RAS DES capability, leaking the reference. The other early returns and the success path drop it. Release the reference on that path as well. Fixes: 7f35b429802a ("perf/dwc_pcie: fix duplicate pci_dev devices") Cc: stable@vger.kernel.org Signed-off-by: Wentao Liang --- drivers/perf/dwc_pcie_pmu.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/perf/dwc_pcie_pmu.c b/drivers/perf/dwc_pcie_pmu.c index 5385401fa9cf..edaf5d2e0daa 100644 --- a/drivers/perf/dwc_pcie_pmu.c +++ b/drivers/perf/dwc_pcie_pmu.c @@ -710,8 +710,10 @@ static int dwc_pcie_pmu_probe(struct platform_device *= plat_dev) } =20 vsec =3D dwc_pcie_des_cap(pdev); - if (!vsec) + if (!vsec) { + pci_dev_put(pdev); return -ENODEV; + } =20 pci_dev_put(pdev); name =3D devm_kasprintf(&plat_dev->dev, GFP_KERNEL, "dwc_rootport_%x", sb= df); --=20 2.34.1