diff options
| author | Ilya Leoshkevich <iii@linux.ibm.com> | 2024-06-21 13:34:47 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-07-03 19:30:21 -0700 |
| commit | 854fa98d1dffd65fee741c742b527a7cf8630dd0 (patch) | |
| tree | b249d6e440f0a89c91e1163155fbc762dc7fc511 /mm/Kconfig | |
| parent | 7d1c8e99b28ad583385532649f186dbc0e0043a6 (diff) | |
| download | lwn-854fa98d1dffd65fee741c742b527a7cf8630dd0.tar.gz lwn-854fa98d1dffd65fee741c742b527a7cf8630dd0.zip | |
kmsan: disable KMSAN when DEFERRED_STRUCT_PAGE_INIT is enabled
KMSAN relies on memblock returning all available pages to it (see
kmsan_memblock_free_pages()). It partitions these pages into 3
categories: pages available to the buddy allocator, shadow pages and
origin pages. This partitioning is static.
If new pages appear after kmsan_init_runtime(), it is considered an error.
DEFERRED_STRUCT_PAGE_INIT causes this, so mark it as incompatible with
KMSAN.
Link: https://lkml.kernel.org/r/20240621113706.315500-4-iii@linux.ibm.com
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: <kasan-dev@googlegroups.com>
Cc: Marco Elver <elver@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Steven Rostedt (Google) <rostedt@goodmis.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/Kconfig')
| -rw-r--r-- | mm/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/Kconfig b/mm/Kconfig index e15256b6e135..991fa9cf6137 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -952,6 +952,7 @@ config DEFERRED_STRUCT_PAGE_INIT depends on SPARSEMEM depends on !NEED_PER_CPU_KM depends on 64BIT + depends on !KMSAN select PADATA help Ordinarily all struct pages are initialised during early boot in a |