linux-kernel - [PATCH] riscv: Pass virtual addresses to kasan_mem_to

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Message-Id: <20210222080734.31631-1-alex@ghiti.fr>
Date:   Mon, 22 Feb 2021 03:07:34 -0500
From:   Alexandre Ghiti <alex@...ti.fr>
To:     Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mike Rapoport <rppt@...nel.org>, kasan-dev@...glegroups.com,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Alexandre Ghiti <alex@...ti.fr>
Subject: [PATCH] riscv: Pass virtual addresses to kasan_mem_to_shadow

kasan_mem_to_shadow translates virtual addresses to kasan shadow
addresses whereas for_each_mem_range returns physical addresses: it is
then required to use __va on those addresses before passing them to
kasan_mem_to_shadow.

Fixes: b10d6bca8720 ("arch, drivers: replace for_each_membock() with for_each_mem_range()")
Signed-off-by: Alexandre Ghiti <alex@...ti.fr>
---
 arch/riscv/mm/kasan_init.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/mm/kasan_init.c b/arch/riscv/mm/kasan_init.c
index 4b9149f963d3..6d3b88f2c566 100644
--- a/arch/riscv/mm/kasan_init.c
+++ b/arch/riscv/mm/kasan_init.c
@@ -148,8 +148,8 @@ void __init kasan_init(void)
 			(void *)kasan_mem_to_shadow((void *)VMALLOC_END));
 
 	for_each_mem_range(i, &_start, &_end) {
-		void *start = (void *)_start;
-		void *end = (void *)_end;
+		void *start = (void *)__va(_start);
+		void *end = (void *)__va(_end);
 
 		if (start >= end)
 			break;
-- 
2.20.1