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kasan: use virt_addr_valid in kasan_addr_to_page/slab

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

Link: https://lkml.kernel.org/r/c22a4850d74d7430f8a6c08216fd55c2860a2b9e.1662411799.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Marco Elver <elver@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Peter Collingbourne <pcc@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Andrey Konovalov
2022-09-05 23:05:37 +02:00
committed by Andrew Morton
parent 9ef08d265e
commit 2c9fb1fd1d
1 changed files with 2 additions and 2 deletions
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4
mm/kasan/report.c
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@@ -208,14 +208,14 @@ static void print_track(struct kasan_track *track, const char *prefix)
struct page *kasan_addr_to_page(const void *addr) 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 virt_to_head_page(addr);
return NULL; return NULL;
} }
struct slab *kasan_addr_to_slab(const void *addr) 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 virt_to_slab(addr);
return NULL; return NULL;
} }