From: Liam R. Howlett <Liam.Howlett@Oracle.com>
Date: Fri, 29 Jan 2021 14:52:37 +0000 (-0500)
Subject: mm/mmap: Fix unlocking before populate check in vm_brk_flags()
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=507e88d3a8ad62d3ec02b59ca7d02f3dc9ad2c7b;p=users%2Fjedix%2Flinux-maple.git

mm/mmap: Fix unlocking before populate check in vm_brk_flags()

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

diff --git a/mm/mmap.c b/mm/mmap.c
index 9f7cd98d813b..5c425fa0b883 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -3021,8 +3021,8 @@ int vm_brk_flags(unsigned long addr, unsigned long request, unsigned long flags)
 	// This vma left intentionally blank.
 	mas_walk(&mas);
 	ret = do_brk_flags(&mas, &mas, &vma, addr, len, flags);
-	mmap_write_unlock(mm);
 	populate = ((mm->def_flags & VM_LOCKED) != 0);
+	mmap_write_unlock(mm);
 	if (populate && !ret)
 		mm_populate_vma(vma, addr, addr + len);
 	return ret;