+ mm-mprotect-use-maple-tree-navigation-instead-of-vma-linked-list-fix.patch added to mm-unstable branch

[Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>]

The patch titled
     Subject: mm/mprotect: fix maple tree start address in do_mprotect_pkey()
has been added to the -mm mm-unstable branch.  Its filename is
     mm-mprotect-use-maple-tree-navigation-instead-of-vma-linked-list-fix.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-mprotect-use-maple-tree-navigation-instead-of-vma-linked-list-fix.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Liam Howlett <liam.howlett@xxxxxxxxxx>
Subject: mm/mprotect: fix maple tree start address in do_mprotect_pkey()
Date: Thu, 25 Aug 2022 20:30:24 +0000

Use the untagged_addr() instead of the address passed into the function.

Link: https://lkml.kernel.org/r/20220825202939.3041660-1-Liam.Howlett@xxxxxxxxxx
Fixes: 3338b715d25d ("mm/mprotect: use maple tree navigation instead of vma linked list")
Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 mm/mprotect.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/mm/mprotect.c~mm-mprotect-use-maple-tree-navigation-instead-of-vma-linked-list-fix
+++ a/mm/mprotect.c
@@ -676,7 +676,7 @@ static int do_mprotect_pkey(unsigned lon
 	const bool rier = (current->personality & READ_IMPLIES_EXEC) &&
 				(prot & PROT_READ);
 	struct mmu_gather tlb;
-	MA_STATE(mas, &current->mm->mm_mt, start, start);
+	MA_STATE(mas, &current->mm->mm_mt, 0, 0);
 
 	start = untagged_addr(start);
 
@@ -708,6 +708,7 @@ static int do_mprotect_pkey(unsigned lon
 	if ((pkey != -1) && !mm_pkey_is_allocated(current->mm, pkey))
 		goto out;
 
+	mas_set(&mas, start);
 	vma = mas_find(&mas, ULONG_MAX);
 	error = -ENOMEM;
 	if (!vma)
_

Patches currently in -mm which might be from liam.howlett@xxxxxxxxxx are

binder_alloc-add-missing-mmap_lock-calls-when-using-the-vma.patch
maple-tree-add-new-data-structure-fix.patch
mm-mprotect-use-maple-tree-navigation-instead-of-vma-linked-list-fix.patch
mm-vmscan-use-vma-iterator-instead-of-vm_next.patch