kasan: Remove redefinitions

Well done, CAF. Test: build kernel with CONFIG_KASAN=y Change-Id: I9ee23d50253ba44d99fa75cef301790228805ee8 Signed-off-by: Alexander Winkowski <[email protected]>
InsideLabs-Inc · Apr 25, 2022 · b980189 · b980189
1 parent 8322f37
commit b980189
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diff --git a/mm/kasan/common.c b/mm/kasan/common.c
@@ -627,55 +627,6 @@ void kasan_report(unsigned long addr, size_t size, bool is_write, unsigned long
 	user_access_restore(flags);
 }
 
-/* Emitted by compiler to poison alloca()ed objects. */
-void __asan_alloca_poison(unsigned long addr, size_t size)
-{
-	size_t rounded_up_size = round_up(size, KASAN_SHADOW_SCALE_SIZE);
-	size_t padding_size = round_up(size, KASAN_ALLOCA_REDZONE_SIZE) -
-			rounded_up_size;
-	size_t rounded_down_size = round_down(size, KASAN_SHADOW_SCALE_SIZE);
-
-	const void *left_redzone = (const void *)(addr -
-			KASAN_ALLOCA_REDZONE_SIZE);
-	const void *right_redzone = (const void *)(addr + rounded_up_size);
-
-	WARN_ON(!IS_ALIGNED(addr, KASAN_ALLOCA_REDZONE_SIZE));
-
-	kasan_unpoison_shadow((const void *)(addr + rounded_down_size),
-			      size - rounded_down_size);
-	kasan_poison_shadow(left_redzone, KASAN_ALLOCA_REDZONE_SIZE,
-			KASAN_ALLOCA_LEFT);
-	kasan_poison_shadow(right_redzone,
-			padding_size + KASAN_ALLOCA_REDZONE_SIZE,
-			KASAN_ALLOCA_RIGHT);
-}
-EXPORT_SYMBOL(__asan_alloca_poison);
-
-/* Emitted by compiler to unpoison alloca()ed areas when the stack unwinds. */
-void __asan_allocas_unpoison(const void *stack_top, const void *stack_bottom)
-{
-	if (unlikely(!stack_top || stack_top > stack_bottom))
-		return;
-
-	kasan_unpoison_shadow(stack_top, stack_bottom - stack_top);
-}
-EXPORT_SYMBOL(__asan_allocas_unpoison);
-
-/* Emitted by the compiler to [un]poison local variables. */
-#define DEFINE_ASAN_SET_SHADOW(byte) \
-	void __asan_set_shadow_##byte(const void *addr, size_t size)	\
-	{								\
-		__memset((void *)addr, 0x##byte, size);			\
-	}								\
-	EXPORT_SYMBOL(__asan_set_shadow_##byte)
-
-DEFINE_ASAN_SET_SHADOW(00);
-DEFINE_ASAN_SET_SHADOW(f1);
-DEFINE_ASAN_SET_SHADOW(f2);
-DEFINE_ASAN_SET_SHADOW(f3);
-DEFINE_ASAN_SET_SHADOW(f5);
-DEFINE_ASAN_SET_SHADOW(f8);
-
 #ifdef CONFIG_MEMORY_HOTPLUG
 static bool shadow_mapped(unsigned long addr)
 {

diff --git a/mm/kasan/report.c b/mm/kasan/report.c
@@ -257,19 +257,6 @@ static void print_shadow_for_address(const void *addr)
 	}
 }
 
-void kasan_report_invalid_free(void *object, unsigned long ip)
-{
-	unsigned long flags;
-
-	kasan_start_report(&flags);
-	pr_err("BUG: KASAN: double-free or invalid-free in %pS\n", (void *)ip);
-	pr_err("\n");
-	print_address_description(object);
-	pr_err("\n");
-	print_shadow_for_address(object);
-	kasan_end_report(&flags);
-}
-
 static bool report_enabled(void)
 {
 	if (current->kasan_depth)