diff mbox series

[mm,v2,03/33] kasan: move is_kmalloc check out of save_alloc_info

Message ID 52c77b163f90a7d24a0a38f713b3849439387431.1658189199.git.andreyknvl@google.com (mailing list archive)
State New
Headers show
Series kasan: switch tag-based modes to stack ring from per-object metadata | expand

Commit Message

andrey.konovalov@linux.dev July 19, 2022, 12:09 a.m. UTC 
From: Andrey Konovalov <andreyknvl@google.com>

Move kasan_info.is_kmalloc check out of save_alloc_info().

This is a preparatory change that simplifies the following patches
in this series.

Reviewed-by: Marco Elver <elver@google.com>
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
---
 mm/kasan/common.c | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)
diff mbox series

Patch

diff --git a/mm/kasan/common.c b/mm/kasan/common.c
index 4b2bbb6063cb..a6fd597f73f5 100644
--- a/mm/kasan/common.c
+++ b/mm/kasan/common.c
@@ -423,15 +423,10 @@  void __kasan_slab_free_mempool(void *ptr, unsigned long ip)
 	}
 }
 
-static void save_alloc_info(struct kmem_cache *cache, void *object,
-				gfp_t flags, bool is_kmalloc)
+static void save_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags)
 {
 	struct kasan_alloc_meta *alloc_meta;
 
-	/* Don't save alloc info for kmalloc caches in kasan_slab_alloc(). */
-	if (cache->kasan_info.is_kmalloc && !is_kmalloc)
-		return;
-
 	alloc_meta = kasan_get_alloc_meta(cache, object);
 	if (alloc_meta)
 		kasan_set_track(&alloc_meta->alloc_track, flags);
@@ -466,8 +461,8 @@  void * __must_check __kasan_slab_alloc(struct kmem_cache *cache,
 	kasan_unpoison(tagged_object, cache->object_size, init);
 
 	/* Save alloc info (if possible) for non-kmalloc() allocations. */
-	if (kasan_stack_collection_enabled())
-		save_alloc_info(cache, (void *)object, flags, false);
+	if (kasan_stack_collection_enabled() && !cache->kasan_info.is_kmalloc)
+		save_alloc_info(cache, (void *)object, flags);
 
 	return tagged_object;
 }
@@ -512,8 +507,8 @@  static inline void *____kasan_kmalloc(struct kmem_cache *cache,
 	 * Save alloc info (if possible) for kmalloc() allocations.
 	 * This also rewrites the alloc info when called from kasan_krealloc().
 	 */
-	if (kasan_stack_collection_enabled())
-		save_alloc_info(cache, (void *)object, flags, true);
+	if (kasan_stack_collection_enabled() && cache->kasan_info.is_kmalloc)
+		save_alloc_info(cache, (void *)object, flags);
 
 	/* Keep the tag that was set by kasan_slab_alloc(). */
 	return (void *)object;