From: Liam R. Howlett <Liam.Howlett@Oracle.com>
Date: Tue, 16 Mar 2021 19:58:27 +0000 (-0400)
Subject: kernel/acct rcu fix
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=4999d715352d4cf753ef34f617619c95589c2593;p=users%2Fjedix%2Flinux-maple.git

kernel/acct rcu fix

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---

diff --git a/kernel/acct.c b/kernel/acct.c
index 5e8934fcdb324..82c79cab4faf2 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -540,8 +540,10 @@ void acct_collect(long exitcode, int group_dead)
 		struct vm_area_struct *vma;
 
 		mmap_read_lock(current->mm);
+		rcu_read_lock();
 		mas_for_each(&mas, vma, ULONG_MAX)
 			vsize += vma->vm_end - vma->vm_start;
+		rcu_read_unlock();
 		mmap_read_unlock(current->mm);
 	}