kasan: respect CONFIG_KASAN_VMALLOC for kasan_flag_vmalloc

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Never enable the kasan_flag_vmalloc static branch unless
CONFIG_KASAN_VMALLOC is enabled.

This does not fix any observable bugs (vmalloc annotations for the HW_TAGS
mode are no-op with CONFIG_KASAN_VMALLOC disabled) but rather just cleans
up the code.

Link: https://lkml.kernel.org/r/3e5c933c8f6b59bd587efb05c407964be951772c.1703188911.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Marco Elver <elver@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

...

This commit is contained in:

Andrey Konovalov 2023-12-21 21:04:49 +01:00 • committed by Andrew Morton

parent 99f3fe416c

commit 58ee788cb2

2 changed files with 8 additions and 0 deletions

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7

mm/kasan/hw_tags.c

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1

mm/kasan/kasan.h

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