From 67668f721bbc07989519795db4ad0b8bfe62da59 Mon Sep 17 00:00:00 2001
From: Minchan Kim <minchan@kernel.org>
Date: Tue, 23 Mar 2021 09:16:14 -0700
Subject: [PATCH] ANDROID: mm: page_pinner: use put_user_page at
 dump_user_range

dump_user_range uses __get_user_pages_locked with FOLL_GET. Thus,
close the page-pinner false positive using put_user_page.

Bug: 183414571
Signed-off-by: Minchan Kim <minchan@google.com>
Signed-off-by: Minchan Kim <minchan@kernel.org>
Change-Id: Ib343a9f61303655b108d60575edae1249ef687df
---
 fs/coredump.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/coredump.c b/fs/coredump.c
index c6acfc694f65..a3a9787eaabc 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -900,7 +900,7 @@ int dump_user_range(struct coredump_params *cprm, unsigned long start,
 
 			stop = !dump_emit(cprm, kaddr, PAGE_SIZE);
 			kunmap(page);
-			put_page(page);
+			put_user_page(page);
 		} else {
 			stop = !dump_skip(cprm, PAGE_SIZE);
 		}