diff options
| author | Alexander Potapenko <glider@google.com> | 2022-09-15 17:03:51 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-10-03 14:03:21 -0700 |
| commit | 3c206509826094e85ead0b056f484db96829248d (patch) | |
| tree | aece5ef9889d132cd93d80205af88f4d211d4e1e /mm/kmsan/kmsan.h | |
| parent | 50b5e49ca694a60f84a2a12d62b6cb6ec8e3649f (diff) | |
| download | linux-3c206509826094e85ead0b056f484db96829248d.tar.bz2 | |
init: kmsan: call KMSAN initialization routines
kmsan_init_shadow() scans the mappings created at boot time and creates
metadata pages for those mappings.
When the memblock allocator returns pages to pagealloc, we reserve 2/3 of
those pages and use them as metadata for the remaining 1/3. Once KMSAN
starts, every page allocated by pagealloc has its associated shadow and
origin pages.
kmsan_initialize() initializes the bookkeeping for init_task and enables
KMSAN.
Link: https://lkml.kernel.org/r/20220915150417.722975-18-glider@google.com
Signed-off-by: Alexander Potapenko <glider@google.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Eric Biggers <ebiggers@google.com>
Cc: Eric Biggers <ebiggers@kernel.org>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Ilya Leoshkevich <iii@linux.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Marco Elver <elver@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vegard Nossum <vegard.nossum@oracle.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/kmsan/kmsan.h')
| -rw-r--r-- | mm/kmsan/kmsan.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/kmsan/kmsan.h b/mm/kmsan/kmsan.h index 77ee068c04ae..7019c46d33a7 100644 --- a/mm/kmsan/kmsan.h +++ b/mm/kmsan/kmsan.h @@ -67,6 +67,7 @@ struct shadow_origin_ptr { struct shadow_origin_ptr kmsan_get_shadow_origin_ptr(void *addr, u64 size, bool store); void *kmsan_get_metadata(void *addr, bool is_origin); +void __init kmsan_init_alloc_meta_for_range(void *start, void *end); enum kmsan_bug_reason { REASON_ANY, @@ -187,6 +188,8 @@ void kmsan_internal_check_memory(void *addr, size_t size, const void *user_addr, int reason); struct page *kmsan_vmalloc_to_page_or_null(void *vaddr); +void kmsan_setup_meta(struct page *page, struct page *shadow, + struct page *origin, int order); /* * kmsan_internal_is_module_addr() and kmsan_internal_is_vmalloc_addr() are |