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v8: out of bounds copy #55261

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merged 1 commit into from
Oct 7, 2024
Merged

v8: out of bounds copy #55261

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3 changes: 1 addition & 2 deletions lib/v8.js
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Original file line number Diff line number Diff line change
Expand Up @@ -49,7 +49,6 @@ if (internalBinding('config').hasInspector) {
}

const assert = require('internal/assert');
const { copy } = internalBinding('buffer');
const { inspect } = require('internal/util/inspect');
const { FastBuffer } = require('internal/buffer');
const { getValidatedPath } = require('internal/fs/utils');
Expand Down Expand Up @@ -368,7 +367,7 @@ class DefaultDeserializer extends Deserializer {
}
// Copy to an aligned buffer first.
const buffer_copy = Buffer.allocUnsafe(byteLength);
copy(this.buffer, buffer_copy, 0, byteOffset, byteOffset + byteLength);
buffer_copy.set(new Uint8Array(this.buffer.buffer, this.buffer.byteOffset + byteOffset, byteLength));
return new ctor(buffer_copy.buffer,
buffer_copy.byteOffset,
byteLength / BYTES_PER_ELEMENT);
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4 changes: 4 additions & 0 deletions test/parallel/test-v8-deserialize-buffer.js
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Expand Up @@ -5,3 +5,7 @@ const v8 = require('v8');

process.on('warning', common.mustNotCall());
v8.deserialize(v8.serialize(Buffer.alloc(0)));
v8.deserialize(v8.serialize({ a: new Int32Array(1024) }));
v8.deserialize(v8.serialize({ b: new Int16Array(8192) }));
v8.deserialize(v8.serialize({ c: new Uint32Array(1024) }));
v8.deserialize(v8.serialize({ d: new Uint16Array(8192) }));
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