linux-kernel - [PATCH 1/1] riscv: Fix KASAN memory mapping.

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Date:   Wed, 13 Jan 2021 10:24:10 +0800
From:   Nylon Chen <nylon7@...estech.com>
To:     <linux-riscv@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
CC:     <kasan-dev@...glegroups.com>, <aou@...s.berkeley.edu>,
        <palmer@...belt.com>, <paul.walmsley@...ive.com>,
        <dvyukov@...gle.com>, <glider@...gle.com>,
        <aryabinin@...tuozzo.com>, <alankao@...estech.com>,
        <nickhu@...estech.com>, <nylon7@...estech.com>
Subject: [PATCH 1/1] riscv: Fix KASAN memory mapping.

From: Nick Hu <nickhu@...estech.com>

Use virtual address instead of physical address when translating
the address to shadow memory by kasan_mem_to_shadow().

Signed-off-by: Nick Hu <nickhu@...estech.com>
Signed-off-by: Nylon Chen <nylon7@...estech.com>
---
 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 12ddd1f6bf70..a8a2ffd9114a 100644
--- a/arch/riscv/mm/kasan_init.c
+++ b/arch/riscv/mm/kasan_init.c
@@ -93,8 +93,8 @@ void __init kasan_init(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;
-- 
2.17.1