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buffer: fix writeUInt16BE range check #24208

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buffer: fix writeUInt16BE range check #24208

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2 changes: 1 addition & 1 deletion lib/internal/buffer.js
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Original file line number Diff line number Diff line change
Expand Up @@ -667,7 +667,7 @@ function writeU_Int16BE(buf, value, offset, min, max) {
}

function writeUInt16BE(value, offset = 0) {
return writeU_Int16BE(this, value, offset, 0, 0xffffffff);
return writeU_Int16BE(this, value, offset, 0, 0xffff);
}

function writeIntLE(value, offset, byteLength) {
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12 changes: 12 additions & 0 deletions test/parallel/test-buffer-writeuint.js
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Expand Up @@ -84,6 +84,18 @@ const assert = require('assert');

data.writeUInt16BE(value, 0);
assert.ok(data.equals(new Uint8Array([0xff, 0x80, 0x43, 0x23])));

value = 0xfffff;
['writeUInt16BE', 'writeUInt16LE'].forEach((fn) => {
assert.throws(
() => data[fn](value, 0),
{
code: 'ERR_OUT_OF_RANGE',
message: 'The value of "value" is out of range. ' +
`It must be >= 0 and <= 65535. Received ${value}`
}
);
});
}

// Test 32 bit
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