[PATCH] mm/mprotect: Fix maple tree start address in do_mprotect_pkey()

[Liam Howlett]

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

Fixes: 3338b715d25d (mm/mprotect: use maple tree navigation instead of vma linked list)
Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
---
 mm/mprotect.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/mprotect.c b/mm/mprotect.c
index f2b9b1da9083..3c79796be65e 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -675,7 +675,7 @@ static int do_mprotect_pkey(unsigned long start, size_t len,
 	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);
 
@@ -707,6 +707,7 @@ static int do_mprotect_pkey(unsigned long start, size_t len,
 	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)
-- 
2.35.1