add toggle for disabling newly added USB devices (e8c17847) · Commits · e / devices / android_kernel_samsung_universal8895

drivers/usb/core/hub.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -39,6 +39,8 @@
		#define USB_VENDOR_GENESYS_LOGIC 0x05e3
		#define HUB_QUIRK_CHECK_PORT_AUTOSUSPEND 0x01

		extern int deny_new_usb;

		/* Protect struct usb_device->state and ->children members
		* Note: Both are also protected by ->dev.sem, except that ->state can
		* change to USB_STATE_NOTATTACHED even when the semaphore isn't held. */
		@@ -4746,6 +4748,12 @@ static void hub_port_connect(struct usb_hub *hub, int port1, u16 portstatus,
		goto done;
		return;
		}

		if (deny_new_usb) {
		dev_err(&port_dev->dev, "denied insert of USB device on port %d\n", port1);
		goto done;
		}

		if (hub_is_superspeed(hub->hdev))
		unit_load = 150;
		else

+15 −0

Original line number	Diff line number	Diff line
		@@ -98,6 +98,10 @@
		#if defined(CONFIG_SYSCTL)

		/* External variables not in a header file. */
		#if IS_ENABLED(CONFIG_USB)
		int deny_new_usb __read_mostly = 0;
		EXPORT_SYMBOL(deny_new_usb);
		#endif
		extern int suid_dumpable;
		#ifdef CONFIG_COREDUMP
		extern int core_uses_pid;
		@@ -875,6 +879,17 @@ static struct ctl_table kern_table[] = {
		.extra1 = &zero,
		.extra2 = &two,
		},
		#endif
		#if IS_ENABLED(CONFIG_USB)
		{
		.procname = "deny_new_usb",
		.data = &deny_new_usb,
		.maxlen = sizeof(int),
		.mode = 0644,
		.proc_handler = proc_dointvec_minmax_sysadmin,
		.extra1 = &zero,
		.extra2 = &one,
		},
		#endif
		{
		.procname = "ngroups_max",