common.c (942baad211336efefb93a8369478888ab845c450) common.c (7a3b835371883558eb63e069d891bd87f562380d)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * This file contains common KASAN code.
4 *
5 * Copyright (c) 2014 Samsung Electronics Co., Ltd.
6 * Author: Andrey Ryabinin <ryabinin.a.a@gmail.com>
7 *
8 * Some code borrowed from https://github.com/xairy/kasan-prototype by

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92 */
93slab_flags_t __kasan_never_merge(void)
94{
95 if (kasan_stack_collection_enabled())
96 return SLAB_KASAN;
97 return 0;
98}
99
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * This file contains common KASAN code.
4 *
5 * Copyright (c) 2014 Samsung Electronics Co., Ltd.
6 * Author: Andrey Ryabinin <ryabinin.a.a@gmail.com>
7 *
8 * Some code borrowed from https://github.com/xairy/kasan-prototype by

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92 */
93slab_flags_t __kasan_never_merge(void)
94{
95 if (kasan_stack_collection_enabled())
96 return SLAB_KASAN;
97 return 0;
98}
99
100void __kasan_alloc_pages(struct page *page, unsigned int order, bool init)
100void __kasan_unpoison_pages(struct page *page, unsigned int order, bool init)
101{
102 u8 tag;
103 unsigned long i;
104
105 if (unlikely(PageHighMem(page)))
106 return;
107
108 tag = kasan_random_tag();
109 for (i = 0; i < (1 << order); i++)
110 page_kasan_tag_set(page + i, tag);
111 kasan_unpoison(page_address(page), PAGE_SIZE << order, init);
112}
113
101{
102 u8 tag;
103 unsigned long i;
104
105 if (unlikely(PageHighMem(page)))
106 return;
107
108 tag = kasan_random_tag();
109 for (i = 0; i < (1 << order); i++)
110 page_kasan_tag_set(page + i, tag);
111 kasan_unpoison(page_address(page), PAGE_SIZE << order, init);
112}
113
114void __kasan_free_pages(struct page *page, unsigned int order, bool init)
114void __kasan_poison_pages(struct page *page, unsigned int order, bool init)
115{
116 if (likely(!PageHighMem(page)))
117 kasan_poison(page_address(page), PAGE_SIZE << order,
118 KASAN_FREE_PAGE, init);
119}
120
121/*
122 * Adaptive redzone policy taken from the userspace AddressSanitizer runtime.

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116 if (likely(!PageHighMem(page)))
117 kasan_poison(page_address(page), PAGE_SIZE << order,
118 KASAN_FREE_PAGE, init);
119}
120
121/*
122 * Adaptive redzone policy taken from the userspace AddressSanitizer runtime.

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