diff options
Diffstat (limited to 'asus-wmi-Restrict-debugfs-interface-when-module-load.patch')
-rw-r--r-- | asus-wmi-Restrict-debugfs-interface-when-module-load.patch | 50 |
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); |