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Potential Vulnerability in Cloned Code #53

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9 changes: 9 additions & 0 deletions HiRedis/win32fix/zmalloc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -58,6 +58,12 @@ void zlibc_free(void *ptr) {
#endif
#endif

#if PREFIX_SIZE > 0
#define ASSERT_NO_SIZE_OVERFLOW(sz) assert((sz) + PREFIX_SIZE > (sz))
#else
#define ASSERT_NO_SIZE_OVERFLOW(sz)
#endif

/* Explicitly override malloc/free etc when using tcmalloc. */
#if defined(USE_TCMALLOC)
#define malloc(size) tc_malloc(size)
Expand Down Expand Up @@ -132,6 +138,7 @@ static void zmalloc_default_oom(size_t size) {
static void (*zmalloc_oom_handler)(size_t) = zmalloc_default_oom;

void *zmalloc(size_t size) {
ASSERT_NO_SIZE_OVERFLOW(size);
void *ptr = malloc(size+PREFIX_SIZE);

if (!ptr) zmalloc_oom_handler(size);
Expand All @@ -146,6 +153,7 @@ void *zmalloc(size_t size) {
}

void *zcalloc(size_t size) {
ASSERT_NO_SIZE_OVERFLOW(size);
void *ptr = calloc(1, size+PREFIX_SIZE);

if (!ptr) zmalloc_oom_handler(size);
Expand All @@ -160,6 +168,7 @@ void *zcalloc(size_t size) {
}

void *zrealloc(void *ptr, size_t size) {
ASSERT_NO_SIZE_OVERFLOW(size);
#ifndef HAVE_MALLOC_SIZE
void *realptr;
#endif
Expand Down