From nobody Fri Feb 13 12:33:10 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A2B44CE7A89 for ; Mon, 25 Sep 2023 06:23:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232243AbjIYGXp (ORCPT ); Mon, 25 Sep 2023 02:23:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50382 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232228AbjIYGXb (ORCPT ); Mon, 25 Sep 2023 02:23:31 -0400 Received: from zju.edu.cn (spam.zju.edu.cn [61.164.42.155]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 3DD47109 for ; Sun, 24 Sep 2023 23:22:31 -0700 (PDT) Received: from localhost.localdomain (unknown [10.190.70.223]) by mail-app4 (Coremail) with SMTP id cS_KCgB3H832JhFl9IXbAA--.20158S4; Mon, 25 Sep 2023 14:21:48 +0800 (CST) From: Dinghao Liu To: dinghao.liu@zju.edu.cn Cc: Toan Le , Lorenzo Pieralisi , =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= , Rob Herring , Bjorn Helgaas , Duc Dang , Tanmay Inamdar , Marc Zyngier , linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] PCI: xgene-msi: Fix a potential UAF in xgene_msi_probe Date: Mon, 25 Sep 2023 14:21:32 +0800 Message-Id: <20230925062133.14170-1-dinghao.liu@zju.edu.cn> X-Mailer: git-send-email 2.17.1 X-CM-TRANSID: cS_KCgB3H832JhFl9IXbAA--.20158S4 X-Coremail-Antispam: 1UD129KBjvdXoW7JF13Cr4xXr15WF13Gr18uFg_yoWDArb_uF yxXF1ruFyDGr13KF48tr4FvF9093WkWw1kKa4FyF1fAa4Iqw1fXry3CrW2qF97Crs8CrnF yr4jyryfC34UZjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbsxFc2x0x2IEx4CE42xK8VAvwI8IcIk0rVWrJVCq3wAFIxvE14AK wVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK021l84ACjcxK6xIIjxv20x vE14v26w1j6s0DM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26rxl6s0DM28EF7xvwVC2z280 aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s0DM2AIxVAIcxkEcVAq07 x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r1j6r18 McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr4 1lF7I21c0EjII2zVCS5cI20VAGYxC7M4IIrI8v6xkF7I0E8cxan2IY04v7MxAIw28IcxkI 7VAKI48JMxAIw28IcVCjz48v1sIEY20_GFWkJr1UJwCFx2IqxVCFs4IE7xkEbVWUJVW8Jw C20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAF wI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjx v20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2 jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0x ZFpf9x0JUdHUDUUUUU= X-CM-SenderInfo: qrrzjiaqtzq6lmxovvfxof0/1tbiAg0HBmUNoyAhBwAJsK Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" xgene_allocate_domains() will call irq_domain_remove() to free msi->inner_domain on failure. However, its caller, xgene_msi_probe(), will also call irq_domain_remove() through xgene_msi_remove() on the same failure, which may lead to a use-after-free. Set the freed pointer to NULL to fix this issue. Fixes: dcd19de36775 ("PCI: xgene: Add APM X-Gene v1 PCIe MSI/MSIX terminati= on driver") Signed-off-by: Dinghao Liu --- drivers/pci/controller/pci-xgene-msi.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pci/controller/pci-xgene-msi.c b/drivers/pci/controlle= r/pci-xgene-msi.c index 3ce38dfd0d29..c0192c5ff0f3 100644 --- a/drivers/pci/controller/pci-xgene-msi.c +++ b/drivers/pci/controller/pci-xgene-msi.c @@ -253,6 +253,7 @@ static int xgene_allocate_domains(struct xgene_msi *msi) =20 if (!msi->msi_domain) { irq_domain_remove(msi->inner_domain); + msi->inner_domain =3D NULL; return -ENOMEM; } =20 --=20 2.17.1