From df9123472ff8f6a5ee847dca8403e4f1eeba2870 Mon Sep 17 00:00:00 2001
From: Kalesh Singh <kaleshsingh@google.com>
Date: Tue, 16 Jan 2024 08:55:56 -0800
Subject: [PATCH] ANDROID: 16K: Fix selinux mmap size check

In page-compat mode all VMAs are forced to be a multiple of the emulated
page size.

Bug: 383389337
Bug: 315325080
Bug: 302403436
Change-Id: I8bde000112363a0946c75a2a895a3fbdcda77c87
Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
---
 security/selinux/selinuxfs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index e172f182b65c..8acbaa4f2cb5 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -14,6 +14,7 @@
 
 #include <linux/kernel.h>
 #include <linux/pagemap.h>
+#include <linux/page_size_compat.h>
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
 #include <linux/fs.h>
@@ -248,7 +249,7 @@ static int sel_mmap_handle_status(struct file *filp,
 	BUG_ON(!status);
 
 	/* only allows one page from the head */
-	if (vma->vm_pgoff > 0 || size != PAGE_SIZE)
+	if (vma->vm_pgoff > 0 || size != __PAGE_SIZE)
 		return -EIO;
 	/* disallow writable mapping */
 	if (vma->vm_flags & VM_WRITE)