From: Liam R. Howlett <Liam.Howlett@Oracle.com>
Date: Thu, 18 Feb 2021 14:24:49 +0000 (-0500)
Subject: mm/mprotect: Use vma_next() of prev.
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=8930eddeac4d1e32f82d1911c1f4ce099b0cd788;p=users%2Fjedix%2Flinux-maple.git

mm/mprotect: Use vma_next() of prev.

The linked list used to use prev->next.  the maple state may be invalidated
by the mprotect_fixup call which may alter the tree.

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

diff --git a/mm/mprotect.c b/mm/mprotect.c
index 6dbd5f685ffb0..0ecc4fbee3327 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -634,7 +634,7 @@ static int do_mprotect_pkey(unsigned long start, size_t len,
 		if (nstart >= end)
 			goto out;
 
-		vma = vma_next(current->mm, vma);
+		vma = vma_next(current->mm, prev);
 		if (!vma || vma->vm_start != nstart) {
 			error = -ENOMEM;
 			goto out;