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authorPeter Collingbourne <pcc@google.com>2021-06-03 02:52:28 +0300
committerWill Deacon <will@kernel.org>2021-06-04 21:32:21 +0300
commit7a3b835371883558eb63e069d891bd87f562380d (patch)
treece4fb6dc7bc68fd8047f7d65b0b55caa310c1b68 /mm/mempool.c
parent92638b4e1b47f97d7269e74465dedf73096f777d (diff)
downloadlinux-7a3b835371883558eb63e069d891bd87f562380d.tar.xz
kasan: use separate (un)poison implementation for integrated init
Currently with integrated init page_alloc.c needs to know whether kasan_alloc_pages() will zero initialize memory, but this will start becoming more complicated once we start adding tag initialization support for user pages. To avoid page_alloc.c needing to know more details of what integrated init will do, move the unpoisoning logic for integrated init into the HW tags implementation. Currently the logic is identical but it will diverge in subsequent patches. For symmetry do the same for poisoning although this logic will be unaffected by subsequent patches. Signed-off-by: Peter Collingbourne <pcc@google.com> Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com> Link: https://linux-review.googlesource.com/id/I2c550234c6c4a893c48c18ff0c6ce658c7c67056 Link: https://lore.kernel.org/r/20210602235230.3928842-3-pcc@google.com Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'mm/mempool.c')
-rw-r--r--mm/mempool.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/mm/mempool.c b/mm/mempool.c
index a258cf4de575..0b8afbec3e35 100644
--- a/mm/mempool.c
+++ b/mm/mempool.c
@@ -106,7 +106,8 @@ static __always_inline void kasan_poison_element(mempool_t *pool, void *element)
if (pool->alloc == mempool_alloc_slab || pool->alloc == mempool_kmalloc)
kasan_slab_free_mempool(element);
else if (pool->alloc == mempool_alloc_pages)
- kasan_free_pages(element, (unsigned long)pool->pool_data, false);
+ kasan_poison_pages(element, (unsigned long)pool->pool_data,
+ false);
}
static void kasan_unpoison_element(mempool_t *pool, void *element)
@@ -114,7 +115,8 @@ static void kasan_unpoison_element(mempool_t *pool, void *element)
if (pool->alloc == mempool_alloc_slab || pool->alloc == mempool_kmalloc)
kasan_unpoison_range(element, __ksize(element));
else if (pool->alloc == mempool_alloc_pages)
- kasan_alloc_pages(element, (unsigned long)pool->pool_data, false);
+ kasan_unpoison_pages(element, (unsigned long)pool->pool_data,
+ false);
}
static __always_inline void add_element(mempool_t *pool, void *element)