From: Liam R. Howlett <Liam.Howlett@Oracle.com>
Date: Tue, 16 Mar 2021 19:58:42 +0000 (-0400)
Subject: events/core rcu fix
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=4cb63a9fa7de708d6a76e0f778f584b4dbf33815;p=users%2Fjedix%2Flinux-maple.git

events/core rcu fix

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

diff --git a/kernel/events/core.c b/kernel/events/core.c
index abc330513abf6..0853c9af32372 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -10002,13 +10002,15 @@ static void perf_addr_filter_apply(struct perf_addr_filter *filter,
 	struct vm_area_struct *vma;
 	MA_STATE(mas, &mm->mm_mt, 0, 0);
 
+	rcu_read_lock();
 	mas_for_each(&mas, vma, ULONG_MAX) {
 		if (!vma->vm_file)
 			continue;
 
 		if (perf_addr_filter_vma_adjust(filter, vma, fr))
-			return;
+			break;
 	}
+	rcu_read_unlock();
 }
 
 /*