| Message ID | 20231121220155.1217090-17-iii@linux.ibm.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | kmsan: Enable on s390 | expand |
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 <vbabka@suse.cz> > --- > 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(); > } >
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(); }
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> --- mm/slub.c | 2 ++ 1 file changed, 2 insertions(+)