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65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* KMSAN checks to be used for one-off annotations in subsystems.
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*
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* Copyright (C) 2017-2022 Google LLC
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* Author: Alexander Potapenko <glider@google.com>
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*
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*/
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#ifndef _LINUX_KMSAN_CHECKS_H
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#define _LINUX_KMSAN_CHECKS_H
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#include <linux/types.h>
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#ifdef CONFIG_KMSAN
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/**
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* kmsan_poison_memory() - Mark the memory range as uninitialized.
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* @address: address to start with.
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* @size: size of buffer to poison.
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* @flags: GFP flags for allocations done by this function.
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*
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* Until other data is written to this range, KMSAN will treat it as
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* uninitialized. Error reports for this memory will reference the call site of
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* kmsan_poison_memory() as origin.
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*/
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void kmsan_poison_memory(const void *address, size_t size, gfp_t flags);
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/**
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* kmsan_unpoison_memory() - Mark the memory range as initialized.
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* @address: address to start with.
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* @size: size of buffer to unpoison.
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*
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* Until other data is written to this range, KMSAN will treat it as
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* initialized.
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*/
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void kmsan_unpoison_memory(const void *address, size_t size);
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/**
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* kmsan_check_memory() - Check the memory range for being initialized.
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* @address: address to start with.
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* @size: size of buffer to check.
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*
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* If any piece of the given range is marked as uninitialized, KMSAN will report
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* an error.
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*/
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void kmsan_check_memory(const void *address, size_t size);
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#else
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static inline void kmsan_poison_memory(const void *address, size_t size,
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gfp_t flags)
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{
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}
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static inline void kmsan_unpoison_memory(const void *address, size_t size)
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{
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}
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static inline void kmsan_check_memory(const void *address, size_t size)
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{
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}
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#endif
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#endif /* _LINUX_KMSAN_CHECKS_H */
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