linux-kernel - [PATCH mm v3 22/34] kasan: use virt_addr_valid in kasan_addr_to

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Message-Id: <c22a4850d74d7430f8a6c08216fd55c2860a2b9e.1662411799.git.andreyknvl@google.com>
Date:   Mon,  5 Sep 2022 23:05:37 +0200
From:   andrey.konovalov@...ux.dev
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Andrey Konovalov <andreyknvl@...il.com>,
        Marco Elver <elver@...gle.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Andrey Ryabinin <ryabinin.a.a@...il.com>,
        kasan-dev@...glegroups.com, Peter Collingbourne <pcc@...gle.com>,
        Evgenii Stepanov <eugenis@...gle.com>,
        Florian Mayer <fmayer@...gle.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        Andrey Konovalov <andreyknvl@...gle.com>
Subject: [PATCH mm v3 22/34] kasan: use virt_addr_valid in kasan_addr_to_page/slab

From: Andrey Konovalov <andreyknvl@...gle.com>

Instead of open-coding the validity checks for addr in
kasan_addr_to_page/slab(), use the virt_addr_valid() helper.

Reviewed-by: Marco Elver <elver@...gle.com>
Signed-off-by: Andrey Konovalov <andreyknvl@...gle.com>

---

Changes v1->v2:
- This is a new patch.
---
 mm/kasan/report.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/kasan/report.c b/mm/kasan/report.c
index 83f420a28c0b..570f9419b90c 100644
--- a/mm/kasan/report.c
+++ b/mm/kasan/report.c
@@ -208,14 +208,14 @@ static void print_track(struct kasan_track *track, const char *prefix)
 
 struct page *kasan_addr_to_page(const void *addr)
 {
-	if ((addr >= (void *)PAGE_OFFSET) && (addr < high_memory))
+	if (virt_addr_valid(addr))
 		return virt_to_head_page(addr);
 	return NULL;
 }
 
 struct slab *kasan_addr_to_slab(const void *addr)
 {
-	if ((addr >= (void *)PAGE_OFFSET) && (addr < high_memory))
+	if (virt_addr_valid(addr))
 		return virt_to_slab(addr);
 	return NULL;
 }
-- 
2.25.1