Re: [PATCH v2 16/33] mm: slub: Let KMSAN access metadata
From: Vlastimil Babka <hidden>
Date: 2023-11-30 15:26:28
Also in:
linux-mm, linux-s390, lkml
On 11/21/23 23:01, Ilya Leoshkevich wrote:
Building the kernel with CONFIG_SLUB_DEBUG and CONFIG_KMSAN causes KMSAN to complain about touching redzones in kfree(). Fix by extending the existing KASAN-related metadata_access_enable() and metadata_access_disable() functions to KMSAN. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Acked-by: Vlastimil Babka <redacted>
quoted hunk ↗ jump to hunk
--- mm/slub.c | 2 ++ 1 file changed, 2 insertions(+)diff --git a/mm/slub.c b/mm/slub.c index 169e5f645ea8..6e61c27951a4 100644 --- a/mm/slub.c +++ b/mm/slub.c@@ -700,10 +700,12 @@ static int disable_higher_order_debug; static inline void metadata_access_enable(void) { kasan_disable_current(); + kmsan_disable_current(); } static inline void metadata_access_disable(void) { + kmsan_enable_current(); kasan_enable_current(); }