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node_modules: update (#307)
Co-authored-by: dawidd6 <9713907+dawidd6@users.noreply.github.com>
This commit is contained in:
Dawid Dziurla
+167
-79
@@ -1,6 +1,6 @@
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.EXPANSION_MAX = void 0;
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exports.EXPANSION_MAX_LENGTH = exports.EXPANSION_MAX = void 0;
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exports.expand = expand;
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const balanced_match_1 = require("balanced-match");
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const escSlash = '\0SLASH' + Math.random() + '\0';
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@@ -19,6 +19,17 @@ const closePattern = /\\}/g;
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const commaPattern = /\\,/g;
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const periodPattern = /\\\./g;
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exports.EXPANSION_MAX = 100_000;
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// `EXPANSION_MAX` caps the *number* of expansions, but not their length. An
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// input like `'{a,b}'.repeat(1500)` stays under that count - its output is
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// truncated to 100k results - while making every result ~1500 characters
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// long. The result set, and the intermediate arrays built while combining
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// brace sets, then grow large enough to exhaust memory and crash the process
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// (CVE-2026-14257). `EXPANSION_MAX_LENGTH` bounds the total number of
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// characters the accumulator may hold at any point, so memory stays flat no
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// matter how many brace groups are chained. The limit sits well above any
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// realistic expansion (100k results hitting `EXPANSION_MAX` measure ~1M
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// characters) so legitimate input is unaffected.
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exports.EXPANSION_MAX_LENGTH = 4_000_000;
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function numeric(str) {
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return !isNaN(str) ? parseInt(str, 10) : str.charCodeAt(0);
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}
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@@ -68,7 +79,7 @@ function expand(str, options = {}) {
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if (!str) {
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return [];
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}
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const { max = exports.EXPANSION_MAX } = options;
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const { max = exports.EXPANSION_MAX, maxLength = exports.EXPANSION_MAX_LENGTH } = options;
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// I don't know why Bash 4.3 does this, but it does.
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// Anything starting with {} will have the first two bytes preserved
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// but *only* at the top level, so {},a}b will not expand to anything,
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@@ -78,7 +89,7 @@ function expand(str, options = {}) {
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if (str.slice(0, 2) === '{}') {
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str = '\\{\\}' + str.slice(2);
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}
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return expand_(escapeBraces(str), max, true).map(unescapeBraces);
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return expand_(escapeBraces(str), max, maxLength, true).map(unescapeBraces);
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}
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function embrace(str) {
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return '{' + str + '}';
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@@ -92,22 +103,117 @@ function lte(i, y) {
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function gte(i, y) {
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return i >= y;
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}
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function expand_(str, max, isTop) {
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/** @type {string[]} */
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const expansions = [];
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const m = (0, balanced_match_1.balanced)('{', '}', str);
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if (!m)
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return [str];
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// no need to expand pre, since it is guaranteed to be free of brace-sets
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const pre = m.pre;
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const post = m.post.length ? expand_(m.post, max, false) : [''];
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if (/\$$/.test(m.pre)) {
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for (let k = 0; k < post.length && k < max; k++) {
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const expansion = pre + '{' + m.body + '}' + post[k];
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expansions.push(expansion);
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// Build `{ acc[a] + pre + values[v] }` for every combination, capping the
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// number of results at `max` and the total number of characters at `maxLength`.
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// This is the one place output grows, so bounding it here keeps the single
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// accumulator - and therefore memory - flat regardless of how many brace groups
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// are combined (CVE-2026-14257).
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function combine(acc, pre, values, max, maxLength, dropEmpties) {
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const out = [];
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let length = 0;
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for (let a = 0; a < acc.length; a++) {
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for (let v = 0; v < values.length; v++) {
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if (out.length >= max)
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return out;
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const expansion = acc[a] + pre + values[v];
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// Bash drops empty results at the top level. Skip them before they count
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// against `max`, so `max` bounds the number of *kept* results.
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if (dropEmpties && !expansion)
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continue;
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if (length + expansion.length > maxLength)
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return out;
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out.push(expansion);
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length += expansion.length;
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}
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}
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else {
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return out;
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}
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// The expansion values of a single numeric (`1..5`) or alphabetic (`a..e..2`)
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// sequence body.
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function expandSequence(body, isAlphaSequence, max, maxLength) {
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const n = body.split(/\.\./);
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const N = [];
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// A sequence body always splits into two or three parts, but the compiler
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// can't know that.
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/* c8 ignore start */
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if (n[0] === undefined || n[1] === undefined) {
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return N;
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}
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/* c8 ignore stop */
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const x = numeric(n[0]);
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const y = numeric(n[1]);
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const width = Math.max(n[0].length, n[1].length);
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let incr = n.length === 3 && n[2] !== undefined ?
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Math.max(Math.abs(numeric(n[2])), 1)
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: 1;
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let test = lte;
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const reverse = y < x;
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if (reverse) {
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incr *= -1;
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test = gte;
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}
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const pad = n.some(isPadded);
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let length = 0;
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for (let i = x; test(i, y) && N.length < max; i += incr) {
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let c;
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if (isAlphaSequence) {
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c = String.fromCharCode(i);
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if (c === '\\') {
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c = '';
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}
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}
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else {
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c = String(i);
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if (pad) {
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const need = width - c.length;
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if (need > 0) {
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const z = new Array(need + 1).join('0');
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if (i < 0) {
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c = '-' + z + c.slice(1);
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}
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else {
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c = z + c;
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}
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}
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}
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}
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if (length + c.length > maxLength)
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break;
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N.push(c);
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length += c.length;
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}
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return N;
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}
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function expand_(str, max, maxLength, isTop) {
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// Consume the string's top-level brace groups left to right, threading a
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// running set of combined prefixes (`acc`). Expanding the tail iteratively -
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// rather than recursing on `m.post` once per group - keeps the native stack
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// depth constant, so deeply chained input (`'{a,b}'.repeat(3000)`) can no
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// longer overflow the stack, and leaves a single accumulator whose size
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// `maxLength` bounds directly (CVE-2026-14257).
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let acc = [''];
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// Bash drops empty results, but only when the *first* top-level group is a
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// comma set - a sequence like `{a..\}` may legitimately yield ''. The drop
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// is on the final strings, so it is applied to whichever `combine` produces
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// them (the one with no brace set left in the tail).
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let dropEmpties = false;
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let firstGroup = true;
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for (;;) {
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const m = (0, balanced_match_1.balanced)('{', '}', str);
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// No brace set left: the rest of the string is literal.
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if (!m) {
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return combine(acc, str, [''], max, maxLength, dropEmpties);
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}
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// no need to expand pre, since it is guaranteed to be free of brace-sets
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const pre = m.pre;
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if (/\$$/.test(pre)) {
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acc = combine(acc, pre + '{' + m.body + '}', [''], max, maxLength, dropEmpties && !m.post.length);
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firstGroup = false;
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if (!m.post.length)
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break;
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str = m.post;
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continue;
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}
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const isNumericSequence = /^-?\d+\.\.-?\d+(?:\.\.-?\d+)?$/.test(m.body);
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const isAlphaSequence = /^[a-zA-Z]\.\.[a-zA-Z](?:\.\.-?\d+)?$/.test(m.body);
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const isSequence = isNumericSequence || isAlphaSequence;
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@@ -116,86 +222,68 @@ function expand_(str, max, isTop) {
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// {a},b}
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if (m.post.match(/,(?!,).*\}/)) {
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str = m.pre + '{' + m.body + escClose + m.post;
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return expand_(str, max, true);
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isTop = true;
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continue;
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}
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return [str];
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// Nothing here expands, so the whole remaining string is literal.
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return combine(acc, pre + '{' + m.body + '}' + m.post, [''], max, maxLength, dropEmpties);
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}
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let n;
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if (firstGroup) {
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dropEmpties = isTop && !isSequence;
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firstGroup = false;
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}
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let values;
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if (isSequence) {
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n = m.body.split(/\.\./);
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values = expandSequence(m.body, isAlphaSequence, max, maxLength);
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}
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else {
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n = parseCommaParts(m.body);
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let n = parseCommaParts(m.body);
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if (n.length === 1 && n[0] !== undefined) {
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// x{{a,b}}y ==> x{a}y x{b}y
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n = expand_(n[0], max, false).map(embrace);
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n = expand_(n[0], max, maxLength, false).map(embrace);
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//XXX is this necessary? Can't seem to hit it in tests.
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/* c8 ignore start */
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if (n.length === 1) {
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return post.map(p => m.pre + n[0] + p);
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acc = combine(acc, pre + n[0], [''], max, maxLength, dropEmpties && !m.post.length);
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if (!m.post.length)
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break;
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str = m.post;
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continue;
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}
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/* c8 ignore stop */
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}
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}
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// at this point, n is the parts, and we know it's not a comma set
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// with a single entry.
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let N;
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if (isSequence && n[0] !== undefined && n[1] !== undefined) {
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const x = numeric(n[0]);
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const y = numeric(n[1]);
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const width = Math.max(n[0].length, n[1].length);
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let incr = n.length === 3 && n[2] !== undefined ?
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Math.max(Math.abs(numeric(n[2])), 1)
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: 1;
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let test = lte;
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const reverse = y < x;
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if (reverse) {
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incr *= -1;
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test = gte;
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// Values that `combine` is going to drop as empty produce no result, so
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// they must not count against `max` - otherwise `{a,,b}` with `max: 2`
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// would stop at `['a', '']` and yield one result instead of two. Skipping
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// them outright keeps `values` bounded while leaving `max` a bound on
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// *kept* results.
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let dropsEmpties = dropEmpties && !m.post.length && !pre;
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for (let d = 0; dropsEmpties && d < acc.length; d++) {
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if (acc[d]) {
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dropsEmpties = false;
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}
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}
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const pad = n.some(isPadded);
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N = [];
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for (let i = x; test(i, y) && N.length < max; i += incr) {
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let c;
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if (isAlphaSequence) {
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c = String.fromCharCode(i);
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if (c === '\\') {
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c = '';
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values = [];
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let valuesLength = 0;
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outer: for (let j = 0; j < n.length; j++) {
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const expanded = expand_(n[j], max, maxLength, false);
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for (let k = 0; k < expanded.length; k++) {
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const v = expanded[k];
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if (dropsEmpties && !v)
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continue;
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if (values.length >= max || valuesLength + v.length > maxLength) {
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break outer;
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}
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}
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else {
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c = String(i);
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if (pad) {
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const need = width - c.length;
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if (need > 0) {
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const z = new Array(need + 1).join('0');
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if (i < 0) {
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c = '-' + z + c.slice(1);
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}
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else {
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c = z + c;
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}
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}
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}
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}
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N.push(c);
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}
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}
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else {
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N = [];
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for (let j = 0; j < n.length; j++) {
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N.push.apply(N, expand_(n[j], max, false));
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}
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}
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for (let j = 0; j < N.length; j++) {
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for (let k = 0; k < post.length && expansions.length < max; k++) {
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const expansion = pre + N[j] + post[k];
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if (!isTop || isSequence || expansion) {
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expansions.push(expansion);
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values.push(v);
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valuesLength += v.length;
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}
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}
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}
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acc = combine(acc, pre, values, max, maxLength, dropEmpties && !m.post.length);
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if (!m.post.length)
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break;
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str = m.post;
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}
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return expansions;
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return acc;
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}
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//# sourceMappingURL=index.js.map
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