blob: d035f90913355e3717110e59f6d2cfc4f8a64544 [file] [log] [blame]
From 0b7cdb0fd5f03e41f1e3073b3eadae80a154092f Mon Sep 17 00:00:00 2001
From: Christophe Leroy <christophe.leroy@c-s.fr>
Date: Fri, 6 Mar 2020 15:09:40 +0000
Subject: [PATCH] powerpc/kasan: Fix kasan_remap_early_shadow_ro()
commit af92bad615be75c6c0d1b1c5b48178360250a187 upstream.
At the moment kasan_remap_early_shadow_ro() does nothing, because
k_end is 0 and k_cur < 0 is always true.
Change the test to k_cur != k_end, as done in
kasan_init_shadow_page_tables()
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Fixes: cbd18991e24f ("powerpc/mm: Fix an Oops in kasan_mmu_init()")
Cc: stable@vger.kernel.org
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/4e7b56865e01569058914c991143f5961b5d4719.1583507333.git.christophe.leroy@c-s.fr
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/arch/powerpc/mm/kasan/kasan_init_32.c b/arch/powerpc/mm/kasan/kasan_init_32.c
index 0e6ed4413eea..1cfe57b51d7e 100644
--- a/arch/powerpc/mm/kasan/kasan_init_32.c
+++ b/arch/powerpc/mm/kasan/kasan_init_32.c
@@ -117,7 +117,7 @@ static void __init kasan_remap_early_shadow_ro(void)
kasan_populate_pte(kasan_early_shadow_pte, prot);
- for (k_cur = k_start & PAGE_MASK; k_cur < k_end; k_cur += PAGE_SIZE) {
+ for (k_cur = k_start & PAGE_MASK; k_cur != k_end; k_cur += PAGE_SIZE) {
pmd_t *pmd = pmd_offset(pud_offset(pgd_offset_k(k_cur), k_cur), k_cur);
pte_t *ptep = pte_offset_kernel(pmd, k_cur);
--
2.7.4