The patch titled
Subject: mm-kasan-switch-slub-to-stackdepot-enable-memory-quarantine-for-slub-fix
has been added to the -mm tree. Its filename is
mm-kasan-switch-slub-to-stackdepot-enable-memory-quarantine-for-slub-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-kasan-switch-slub-to-stackdepot-enable-memory-quarantine-for-slub-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-kasan-switch-slub-to-stackdepot-enable-memory-quarantine-for-slub-fix.patch
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------------------------------------------------------
From: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Subject: mm-kasan-switch-slub-to-stackdepot-enable-memory-quarantine-for-slub-fix
- Remove CONFIG_SLAB ifdefs. The code works just fine with both allocators.
- Reset metada offsets if metadata doesn't fit. Otherwise kasan_metadata_size()
will give us the wrong results.
Link: http://lkml.kernel.org/r/1468601423-28676-1-git-send-email-aryabinin@xxxxxxxxxxxxx
Signed-off-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Acked-by: Alexander Potapenko <glider@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/kasan/kasan.c | 17 +++++------------
1 file changed, 5 insertions(+), 12 deletions(-)
diff -puN mm/kasan/kasan.c~mm-kasan-switch-slub-to-stackdepot-enable-memory-quarantine-for-slub-fix mm/kasan/kasan.c
--- a/mm/kasan/kasan.c~mm-kasan-switch-slub-to-stackdepot-enable-memory-quarantine-for-slub-fix
+++ a/mm/kasan/kasan.c
@@ -372,9 +372,7 @@ void kasan_cache_create(struct kmem_cach
unsigned long *flags)
{
int redzone_adjust;
-#ifdef CONFIG_SLAB
int orig_size = *size;
-#endif
/* Add alloc meta. */
cache->kasan_info.alloc_meta_offset = *size;
@@ -392,25 +390,20 @@ void kasan_cache_create(struct kmem_cach
if (redzone_adjust > 0)
*size += redzone_adjust;
-#ifdef CONFIG_SLAB
- *size = min(KMALLOC_MAX_SIZE,
- max(*size,
- cache->object_size +
- optimal_redzone(cache->object_size)));
+ *size = min(KMALLOC_MAX_SIZE, max(*size, cache->object_size +
+ optimal_redzone(cache->object_size)));
+
/*
* If the metadata doesn't fit, don't enable KASAN at all.
*/
if (*size <= cache->kasan_info.alloc_meta_offset ||
*size <= cache->kasan_info.free_meta_offset) {
+ cache->kasan_info.alloc_meta_offset = 0;
+ cache->kasan_info.free_meta_offset = 0;
*size = orig_size;
return;
}
-#else
- *size = max(*size,
- cache->object_size +
- optimal_redzone(cache->object_size));
-#endif
*flags |= SLAB_KASAN;
}
_
Patches currently in -mm which might be from aryabinin@xxxxxxxxxxxxx are
radix-tree-fix-radix_tree_iter_retry-for-tagged-iterators.patch
mm-kasan-switch-slub-to-stackdepot-enable-memory-quarantine-for-slub-fix.patch
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