lockdown: Lock down TIOCSSERIAL (794edf30) · Commits · 戴 / test

drivers/tty/serial/serial_core.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -22,6 +22,7 @@
		#include <linux/serial_core.h>
		#include <linux/delay.h>
		#include <linux/mutex.h>
		#include <linux/security.h>

		#include <linux/irq.h>
		#include <linux/uaccess.h>
		@@ -862,6 +863,10 @@ static int uart_set_info(struct tty_struct tty, struct tty_port port,
		goto check_and_exit;
		}

		retval = security_locked_down(LOCKDOWN_TIOCSSERIAL);
		if (retval && (change_irq \|\| change_port))
		goto exit;

		/*
		* Ask the low level driver to verify the settings.
		*/

+1 −0

Original line number	Diff line number	Diff line
		@@ -112,6 +112,7 @@ enum lockdown_reason {
		LOCKDOWN_MSR,
		LOCKDOWN_ACPI_TABLES,
		LOCKDOWN_PCMCIA_CIS,
		LOCKDOWN_TIOCSSERIAL,
		LOCKDOWN_INTEGRITY_MAX,
		LOCKDOWN_CONFIDENTIALITY_MAX,
		};

+1 −0

Original line number	Diff line number	Diff line
		@@ -27,6 +27,7 @@ static char *lockdown_reasons[LOCKDOWN_CONFIDENTIALITY_MAX+1] = {
		[LOCKDOWN_MSR] = "raw MSR access",
		[LOCKDOWN_ACPI_TABLES] = "modifying ACPI tables",
		[LOCKDOWN_PCMCIA_CIS] = "direct PCMCIA CIS storage",
		[LOCKDOWN_TIOCSSERIAL] = "reconfiguration of serial port IO",
		[LOCKDOWN_INTEGRITY_MAX] = "integrity",
		[LOCKDOWN_CONFIDENTIALITY_MAX] = "confidentiality",
		};