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| author | Peter Collingbourne <pcc@google.com> | 2021-06-02 16:52:28 -0700 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-06-04 19:32:21 +0100 |
| commit | 7a3b835371883558eb63e069d891bd87f562380d (patch) | |
| tree | ce4fb6dc7bc68fd8047f7d65b0b55caa310c1b68 /mm/mempool.c | |
| parent | 92638b4e1b47f97d7269e74465dedf73096f777d (diff) | |
| download | linux-7a3b835371883558eb63e069d891bd87f562380d.tar.gz linux-7a3b835371883558eb63e069d891bd87f562380d.tar.bz2 linux-7a3b835371883558eb63e069d891bd87f562380d.zip | |
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.c | 6 |
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) |