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lib/common/allocations.h
59 строк
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NiDU-NINJA
Fix potential NULL pointer dereference in ZSTD_customCalloc when custom allocator fails
07 мар 2026, 11:27
07 мар 2026, 11:27
3f8f9b3
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/* * Copyright (c) Meta Platforms, Inc. and affiliates. * All rights reserved. * * This source code is licensed under both the BSD-style license (found in the * LICENSE file in the root directory of this source tree) and the GPLv2 (found * in the COPYING file in the root directory of this source tree). * You may select, at your option, one of the above-listed licenses. */ /* This file provides custom allocation primitives */ #define ZSTD_DEPS_NEED_MALLOC #include "zstd_deps.h" /* ZSTD_malloc, ZSTD_calloc, ZSTD_free, ZSTD_memset */ #include "compiler.h" /* MEM_STATIC */ #define ZSTD_STATIC_LINKING_ONLY #include "../zstd.h" /* ZSTD_customMem */ #ifndef ZSTD_ALLOCATIONS_H #define ZSTD_ALLOCATIONS_H /* custom memory allocation functions */ MEM_STATIC void* ZSTD_customMalloc(size_t size, ZSTD_customMem customMem) { if (customMem.customAlloc) return customMem.customAlloc(customMem.opaque, size); return ZSTD_malloc(size); } MEM_STATIC void* ZSTD_customCalloc(size_t size, ZSTD_customMem customMem) { if (customMem.customAlloc) { /* calloc implemented as malloc+memset */ void* const ptr = customMem.customAlloc(customMem.opaque, size); if (ptr == NULL) { return NULL; } ZSTD_memset(ptr, 0, size); return ptr; } return ZSTD_calloc(1, size); } MEM_STATIC void ZSTD_customFree(void* ptr, ZSTD_customMem customMem) { if (ptr!=NULL) { if (customMem.customFree) customMem.customFree(customMem.opaque, ptr); else ZSTD_free(ptr); } } #endif /* ZSTD_ALLOCATIONS_H */