1 files changed, 50 insertions, 0 deletions
diff --git a/asus-wmi-Restrict-debugfs-interface-when-module-load.patch b/asus-wmi-Restrict-debugfs-interface-when-module-load.patch
new file mode 100644
index 000000000..929853201
--- /dev/null
+++ b/asus-wmi-Restrict-debugfs-interface-when-module-load.patch
@@ -0,0 +1,50 @@
+From: Matthew Garrett <matthew.garrett@nebula.com>
+Date: Fri, 9 Mar 2012 08:46:50 -0500
+Subject: [PATCH] asus-wmi: Restrict debugfs interface when module loading is
+ restricted
+
+We have no way of validating what all of the Asus WMI methods do on a
+given machine, and there's a risk that some will allow hardware state to
+be manipulated in such a way that arbitrary code can be executed in the
+kernel, circumventing module loading restrictions. Prevent that if any of
+these features are enabled.
+
+Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
+---
+ drivers/platform/x86/asus-wmi.c | 9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
+index 7543a56e0f45..93b5a6998371 100644
+--- a/drivers/platform/x86/asus-wmi.c
++++ b/drivers/platform/x86/asus-wmi.c
+@@ -1589,6 +1589,9 @@ static int show_dsts(struct seq_file *m, void *data)
+ 	int err;
+ 	u32 retval = -1;
+ 
++	if (secure_modules())
++		return -EPERM;
++
+ 	err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval);
+ 
+ 	if (err < 0)
+@@ -1605,6 +1608,9 @@ static int show_devs(struct seq_file *m, void *data)
+ 	int err;
+ 	u32 retval = -1;
+ 
++	if (secure_modules())
++		return -EPERM;
++
+ 	err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param,
+ 				    &retval);
+ 
+@@ -1629,6 +1635,9 @@ static int show_call(struct seq_file *m, void *data)
+ 	union acpi_object *obj;
+ 	acpi_status status;
+ 
++	if (secure_modules())
++		return -EPERM;
++
+ 	status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID,
+ 				     1, asus->debug.method_id,
+ 				     &input, &output);