Merge "lkdtm: fix ACCESS_USERSPACE test" (9fa9bdbb) · Commits · e / devices / android_kernel_xiaomi_markw

drivers/misc/lkdtm.c

+7 −1

Original line number	Diff line number	Diff line
		@@ -475,7 +475,7 @@ static void lkdtm_do_action(enum ctype which)
		break;
		}
		case CT_ACCESS_USERSPACE: {
		unsigned long user_addr, tmp;
		unsigned long user_addr, tmp = 0;
		unsigned long *ptr;

		user_addr = vm_mmap(NULL, 0, PAGE_SIZE,
		@@ -486,6 +486,12 @@ static void lkdtm_do_action(enum ctype which)
		return;
		}

		if (copy_to_user((void __user *)user_addr, &tmp, sizeof(tmp))) {
		pr_warn("copy_to_user failed\n");
		vm_munmap(user_addr, PAGE_SIZE);
		return;
		}

		ptr = (unsigned long *)user_addr;

		pr_info("attempting bad read at %p\n", ptr);