[PATCH] riscv: Pass virtual addresses to kasan_mem_to_shadow

From: Alexandre Ghiti <alex@ghiti.fr>
To: Andrey Ryabinin <aryabinin@virtuozzo.com>,
	Alexander Potapenko <glider@google.com>,
	Dmitry Vyukov <dvyukov@google.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Andrew Morton <akpm@linux-foundation.org>,
	Mike Rapoport <rppt@kernel.org>,
	kasan-dev@googlegroups.com, linux-riscv@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: Alexandre Ghiti <alex@ghiti.fr>
Subject: [PATCH] riscv: Pass virtual addresses to kasan_mem_to_shadow
Date: Mon, 22 Feb 2021 03:07:34 -0500	[thread overview]
Message-ID: <20210222080734.31631-1-alex@ghiti.fr> (raw)

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@ghiti.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

