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Fix NULL deref in JS_NewRuntime2

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The API allows for the malloc_usable_size callback to be NULL, so it
must not be dereferenced before the NULL check.
This commit is contained in:
bptato 2024-11-15 14:40:04 +01:00 committed by Saúl Ibarra Corretgé
parent 284510f781
commit 42f0945114
1 changed files with 3 additions and 3 deletions
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6
quickjs.c
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@ -1795,14 +1795,14 @@ JSRuntime *JS_NewRuntime2(const JSMallocFunctions *mf, void *opaque)
rt = mf->js_calloc(opaque, 1, sizeof(JSRuntime));
if (!rt)
return NULL;
/* Inline what js_malloc_rt does since we cannot use it here. */
ms.malloc_count++;
ms.malloc_size += mf->js_malloc_usable_size(rt) + MALLOC_OVERHEAD;
rt->mf = *mf;
if (!rt->mf.js_malloc_usable_size) {
/* use dummy function if none provided */
rt->mf.js_malloc_usable_size = js_malloc_usable_size_unknown;
}
/* Inline what js_malloc_rt does since we cannot use it here. */
ms.malloc_count++;
ms.malloc_size += rt->mf.js_malloc_usable_size(rt) + MALLOC_OVERHEAD;
rt->malloc_state = ms;
rt->malloc_gc_threshold = 256 * 1024;