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fs: adjust
position validation in reading methods
This prohibits invalid values (< -1 and non-integers) and allows `filehandle.read()` to handle position up to `2n ** 63n - 1n` PR-URL: #42835 Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
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84 changes: 84 additions & 0 deletions
84
test/parallel/test-fs-read-promises-position-validation.mjs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| import '../common/index.mjs'; | ||
| import * as fixtures from '../common/fixtures.mjs'; | ||
| import fs from 'fs'; | ||
| import assert from 'assert'; | ||
|
|
||
| // This test ensures that "position" argument is correctly validated | ||
|
|
||
| const filepath = fixtures.path('x.txt'); | ||
|
|
||
| const buffer = Buffer.from('xyz\n'); | ||
| const offset = 0; | ||
| const length = buffer.byteLength; | ||
|
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| // allowedErrors is an array of acceptable internal errors | ||
| // For example, on some platforms read syscall might return -EFBIG | ||
| async function testValid(position, allowedErrors = []) { | ||
| let fh; | ||
| try { | ||
| fh = await fs.promises.open(filepath, 'r'); | ||
| await fh.read(buffer, offset, length, position); | ||
| await fh.read({ buffer, offset, length, position }); | ||
| await fh.read(buffer, { offset, length, position }); | ||
| } catch (err) { | ||
| if (!allowedErrors.includes(err.code)) { | ||
| assert.fail(err); | ||
| } | ||
| } finally { | ||
| await fh?.close(); | ||
| } | ||
| } | ||
|
|
||
| async function testInvalid(code, position) { | ||
| let fh; | ||
| try { | ||
| fh = await fs.promises.open(filepath, 'r'); | ||
| await assert.rejects( | ||
| fh.read(buffer, offset, length, position), | ||
| { code } | ||
| ); | ||
| await assert.rejects( | ||
| fh.read({ buffer, offset, length, position }), | ||
| { code } | ||
| ); | ||
| await assert.rejects( | ||
| fh.read(buffer, { offset, length, position }), | ||
| { code } | ||
| ); | ||
| } finally { | ||
| await fh?.close(); | ||
| } | ||
| } | ||
|
|
||
| { | ||
| await testValid(undefined); | ||
| await testValid(null); | ||
| await testValid(-1); | ||
| await testValid(-1n); | ||
|
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| await testValid(0); | ||
| await testValid(0n); | ||
| await testValid(1); | ||
| await testValid(1n); | ||
| await testValid(9); | ||
| await testValid(9n); | ||
| await testValid(Number.MAX_SAFE_INTEGER, [ 'EFBIG' ]); | ||
|
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| await testValid(2n ** 63n - 1n - BigInt(length), [ 'EFBIG' ]); | ||
| await testInvalid('ERR_OUT_OF_RANGE', 2n ** 63n); | ||
| await testInvalid('ERR_OUT_OF_RANGE', 2n ** 63n - BigInt(length)); | ||
|
|
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| await testInvalid('ERR_OUT_OF_RANGE', NaN); | ||
| await testInvalid('ERR_OUT_OF_RANGE', -Infinity); | ||
| await testInvalid('ERR_OUT_OF_RANGE', Infinity); | ||
| await testInvalid('ERR_OUT_OF_RANGE', -0.999); | ||
| await testInvalid('ERR_OUT_OF_RANGE', -(2n ** 64n)); | ||
| await testInvalid('ERR_OUT_OF_RANGE', Number.MAX_SAFE_INTEGER + 1); | ||
| await testInvalid('ERR_OUT_OF_RANGE', Number.MAX_VALUE); | ||
|
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| for (const badTypeValue of [ | ||
| false, true, '1', Symbol(1), {}, [], () => {}, Promise.resolve(1), | ||
| ]) { | ||
| testInvalid('ERR_INVALID_ARG_TYPE', badTypeValue); | ||
| } | ||
| } |
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