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Berry safeguard when freeing null pointer (#18735)

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s-hadinger 2023-05-29 11:00:20 +02:00 committed by GitHub
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lib/libesp32/berry/src/be_mem.c
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@ -66,6 +66,7 @@ BERRY_API void* be_realloc(bvm *vm, void *ptr, size_t old_size, size_t new_size)
/* Case 2: deallocate */ /* Case 2: deallocate */
else if (new_size == 0) { else if (new_size == 0) {
if (ptr == NULL) { return NULL; } /* safeguard */
#if BE_USE_DEBUG_GC #if BE_USE_DEBUG_GC
memset(ptr, 0xFF, old_size); /* fill the structure with invalid pointers */ memset(ptr, 0xFF, old_size); /* fill the structure with invalid pointers */
#endif #endif