linux-kernel - [PATCH] kasan: fix incorrect arguments passing in kasan_add_zero

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Message-Id: <20210103063847.5963-1-lecopzer@gmail.com>
Date:   Sun,  3 Jan 2021 14:38:47 +0800
From:   Lecopzer Chen <lecopzer@...il.com>
To:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        kasan-dev@...glegroups.com
Cc:     dan.j.williams@...el.com, aryabinin@...tuozzo.com,
        glider@...gle.com, dvyukov@...gle.com, akpm@...ux-foundation.org,
        linux-mediatek@...ts.infradead.org, yj.chiang@...iatek.com,
        Lecopzer Chen <lecopzer@...il.com>,
        Lecopzer Chen <lecopzer.chen@...iatek.com>
Subject: [PATCH] kasan: fix incorrect arguments passing in kasan_add_zero_shadow

kasan_remove_zero_shadow() shall use original virtual address, start
and size, instead of shadow address.

Fixes: 0207df4fa1a86 ("kernel/memremap, kasan: make ZONE_DEVICE with work with KASAN")
Signed-off-by: Lecopzer Chen <lecopzer.chen@...iatek.com>
---
 mm/kasan/init.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mm/kasan/init.c b/mm/kasan/init.c
index bc0ad208b3a7..67051cfae41c 100644
--- a/mm/kasan/init.c
+++ b/mm/kasan/init.c
@@ -481,7 +481,6 @@ int kasan_add_zero_shadow(void *start, unsigned long size)
 
 	ret = kasan_populate_early_shadow(shadow_start, shadow_end);
 	if (ret)
-		kasan_remove_zero_shadow(shadow_start,
-					size >> KASAN_SHADOW_SCALE_SHIFT);
+		kasan_remove_zero_shadow(start, size);
 	return ret;
 }
-- 
2.25.1