linux-kernel - [PATCH] PCI: xgene-msi: Fix a potential UAF in xgene_msi

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230925062133.14170-1-dinghao.liu@zju.edu.cn>
Date:   Mon, 25 Sep 2023 14:21:32 +0800
From:   Dinghao Liu <dinghao.liu@....edu.cn>
To:     dinghao.liu@....edu.cn
Cc:     Toan Le <toan@...amperecomputing.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Rob Herring <robh@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>, Duc Dang <dhdang@....com>,
        Tanmay Inamdar <tinamdar@....com>,
        Marc Zyngier <maz@...nel.org>, linux-pci@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] PCI: xgene-msi: Fix a potential UAF in xgene_msi_probe

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 termination driver")
Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
---
 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/controller/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)
 
 	if (!msi->msi_domain) {
 		irq_domain_remove(msi->inner_domain);
+		msi->inner_domain = NULL;
 		return -ENOMEM;
 	}
 
-- 
2.17.1