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Sun, 29 Mar 2026 19:28:01 -0700 (PDT) Received: from dtor-ws.sjc.corp.google.com ([2a00:79e0:2ebe:8:7265:773a:8e51:c62f]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-2c3c7971d97sm6250673eec.30.2026.03.29.19.27.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 29 Mar 2026 19:28:00 -0700 (PDT) From: Dmitry Torokhov Date: Sun, 29 Mar 2026 19:27:50 -0700 Subject: [PATCH v2 3/4] software node: verify that property data is not on stack Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260329-property-gpio-fix-v2-3-3cca5ba136d8@gmail.com> References: <20260329-property-gpio-fix-v2-0-3cca5ba136d8@gmail.com> In-Reply-To: <20260329-property-gpio-fix-v2-0-3cca5ba136d8@gmail.com> To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, Hans de Goede , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich , Andy Shevchenko , Daniel Scally , Heikki Krogerus , Sakari Ailus Cc: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, driver-core@lists.linux.dev X-Mailer: b4 0.15-dev-a6826 When registering a software node, ensure that the property data is not located on the stack, as it is expected to persist for the lifetime of the node. Signed-off-by: Dmitry Torokhov --- drivers/base/swnode.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c index 51320837f3a9..286eab02e8fb 100644 --- a/drivers/base/swnode.c +++ b/drivers/base/swnode.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include #include @@ -917,6 +918,7 @@ EXPORT_SYMBOL_GPL(software_node_unregister_node_group); int software_node_register(const struct software_node *node) { struct swnode *parent =3D software_node_to_swnode(node->parent); + const struct property_entry *prop; =20 if (software_node_to_swnode(node)) return -EEXIST; @@ -924,6 +926,14 @@ int software_node_register(const struct software_node = *node) if (node->parent && !parent) return -EINVAL; =20 + for (prop =3D node->properties; prop && prop->name; prop++) { + if (!prop->is_inline && object_is_on_stack(prop->pointer)) { + pr_err("%s: property data can't be on stack ('%s')\n", + __func__, prop->name); + return -EINVAL; + } + } + return PTR_ERR_OR_ZERO(swnode_register(node, parent, 0)); } EXPORT_SYMBOL_GPL(software_node_register); --=20 2.53.0.1018.g2bb0e51243-goog