fix(backup-config): throw if include patterns have un-supported chars (#931)

apps/agent/src/commands/helpers/__tests__/backup.helpers.test.ts

@@ -130,6 +130,24 @@ describe("backup path options", () => {
 		).toThrow("Include pattern escapes volume root");
 	});
 
+	test("rejects unsupported characters in selected include paths", () => {
+		const volumePath = "/var/lib/zerobyte/volumes/vol123/_data";
+
+		for (const includePath of ["/Photos\0/etc/passwd", "/Photos\n/etc/passwd", "/Photos\r/etc/passwd"]) {
+			expect(() => createOptions(createPathOptions({ includePaths: [includePath] }), volumePath)).toThrow(
+				"Include pattern contains an unsupported path character",
+			);
+		}
+	});
+
+	test("rejects unsupported characters in include patterns", () => {
+		const volumePath = "/var/lib/zerobyte/volumes/vol123/_data";
+
+		expect(() =>
+			createOptions(createPathOptions({ includePatterns: ["/Photos\n/etc/passwd"] }), volumePath),
+		).toThrow("Include pattern contains an unsupported path character");
+	});
+
 	test("anchors generated include patterns under the volume path", () => {
 		const volumePath = "/var/lib/zerobyte/volumes/vol123/_data";
 

apps/agent/src/commands/helpers/backup.helpers.ts

@@ -1,9 +1,14 @@
 import path from "node:path";
 import type { BackupRunPayload } from "@zerobyte/contracts/agent-protocol";
+import { hasUnsupportedPathCharacter } from "@zerobyte/core/utils";
 
 type BackupOptions = BackupRunPayload["options"];
 
 export const processPattern = (pattern: string, volumePath: string, relative = false) => {
+	if (relative && hasUnsupportedPathCharacter(pattern)) {
+		throw new Error(`Include pattern contains an unsupported path character: ${pattern}`);
+	}
+
 	const isNegated = pattern.startsWith("!");
 	const p = isNegated ? pattern.slice(1) : pattern;
 

packages/core/src/restic/commands/__tests__/backup.test.ts

@@ -158,6 +158,41 @@ describe("backup command", () => {
 			expect(patternIncludeContent).toBe("/mnt/data/**/*.zip");
 		});
 
+		test("rejects unsupported characters before writing raw include files", async () => {
+			const { getArgs } = setup();
+
+			const error = await runBackupError(
+				config,
+				"/mnt/data",
+				{
+					organizationId: "org-1",
+					includePaths: ["/mnt/data/safe\0/etc/passwd"],
+					includePatterns: ["/mnt/data/**/*.zip"],
+				},
+				mockDeps,
+			);
+
+			expect(String(error.message)).toContain("includePaths contains an unsupported path character");
+			expect(getArgs()).toEqual([]);
+		});
+
+		test("rejects unsupported characters before writing include pattern files", async () => {
+			const { getArgs } = setup();
+
+			const error = await runBackupError(
+				config,
+				"/mnt/data",
+				{
+					organizationId: "org-1",
+					includePatterns: ["/mnt/data/safe\n/etc/passwd"],
+				},
+				mockDeps,
+			);
+
+			expect(String(error.message)).toContain("includePatterns contains an unsupported path character");
+			expect(getArgs()).toEqual([]);
+		});
+
 		test("always includes DEFAULT_EXCLUDES as --exclude args", async () => {
 			const { getOptionValues } = setup();
 			await runBackup(config, "/mnt/data", { organizationId: "org-1" }, mockDeps);
@@ -232,7 +267,9 @@ describe("backup command", () => {
 
 			const error = await runBackupError(config, "/mnt/data", { organizationId: "org-1" }, mockDeps);
 			expect(error).toBeInstanceOf(ResticError);
-			expect((error as ResticError).summary).toBe("Command failed: An error occurred while executing the command.");
+			expect((error as ResticError).summary).toBe(
+				"Command failed: An error occurred while executing the command.",
+			);
 			expect((error as ResticError).details).toBe(
 				"Permissions 0755 for '/tmp/zerobyte-ssh-key' are too open.\nThis private key will be ignored.",
 			);
@@ -327,7 +364,8 @@ describe("backup command", () => {
 		test("ignores valid JSON lines that do not match the progress schema", async () => {
 			const progressUpdates: unknown[] = [];
 			setup({
-				onSpawnCall: (params) => params.onStdout?.(JSON.stringify({ message_type: "verbose_status", action: "scan" })),
+				onSpawnCall: (params) =>
+					params.onStdout?.(JSON.stringify({ message_type: "verbose_status", action: "scan" })),
 			});
 
 			await runBackup(

packages/core/src/restic/commands/backup.ts

@@ -13,13 +13,21 @@ import { validateCustomResticParams } from "../helpers/validate-custom-params";
 import { createResticError, isResticError } from "../error";
 import { logger, safeSpawn } from "../../node";
 import type { ResticDeps } from "../types";
-import { toMessage } from "../../utils";
+import { hasUnsupportedPathCharacter, toMessage } from "../../utils";
 
 class ResticBackupCommandError extends Data.TaggedError("ResticBackupCommandError")<{
 	cause: unknown;
 	message: string;
 }> {}
 
+const validatePatterns = (entries: string[], optionName: string) => {
+	for (const entry of entries) {
+		if (hasUnsupportedPathCharacter(entry)) {
+			throw new Error(`${optionName} contains an unsupported path character: ${entry}`);
+		}
+	}
+};
+
 export const backup = (
 	config: RepositoryConfig,
 	source: string,
@@ -66,6 +74,8 @@ export const backup = (
 				(!options.includePatterns || options.includePatterns.length === 0);
 
 			if (options.includePatterns?.length) {
+				validatePatterns(options.includePatterns, "includePatterns");
+
 				const tmp = await fs.mkdtemp(path.join(os.tmpdir(), "zerobyte-restic-include-"));
 				includeFile = path.join(tmp, "include.txt");
 
@@ -75,6 +85,8 @@ export const backup = (
 			}
 
 			if (options.includePaths?.length) {
+				validatePatterns(options.includePaths, "includePaths");
+
 				const tmp = await fs.mkdtemp(path.join(os.tmpdir(), "zerobyte-restic-include-raw-"));
 				rawIncludeFile = path.join(tmp, "include.raw");
 

packages/core/src/utils/__tests__/path.test.ts

@@ -1,7 +1,7 @@
 import path from "node:path";
 import fc from "fast-check";
 import { describe, expect, test } from "vitest";
-import { isPathWithin, normalizeAbsolutePath } from "../path";
+import { hasUnsupportedPathCharacter, isPathWithin, normalizeAbsolutePath } from "../path";
 
 const safePathSegmentArb = fc
 	.array(fc.constantFrom("a", "b", "c", "x", "y", "z", "0", "1", "2", "-", "_", ".", " "), {
@@ -80,12 +80,25 @@ describe("isPathWithin", () => {
 
 	test("matches descendants created under the same normalized base", () => {
 		fc.assert(
-			fc.property(fc.string({ maxLength: 80 }), fc.array(safePathSegmentArb, { maxLength: 5 }), (base, segments) => {
+			fc.property(
+				fc.string({ maxLength: 80 }),
+				fc.array(safePathSegmentArb, { maxLength: 5 }),
+				(base, segments) => {
 					const normalizedBase = normalizeAbsolutePath(base);
 					const descendant = path.posix.join(normalizedBase, ...segments);
 
 					expect(isPathWithin(base, descendant)).toBe(true);
-			}),
+				},
+			),
 		);
 	});
 });
+
+describe("hasUnsupportedPathCharacter", () => {
+	test("detects path characters that are not supported by include files", () => {
+		expect(hasUnsupportedPathCharacter("Photos")).toBe(false);
+		expect(hasUnsupportedPathCharacter("Photos\0Secrets")).toBe(true);
+		expect(hasUnsupportedPathCharacter("Photos\nSecrets")).toBe(true);
+		expect(hasUnsupportedPathCharacter("Photos\rSecrets")).toBe(true);
+	});
+});

packages/core/src/utils/index.ts

@@ -1,4 +1,4 @@
 export { safeJsonParse } from "./json.js";
 export { toErrorDetails, toMessage } from "./errors.js";
-export { isPathWithin, normalizeAbsolutePath } from "./path.js";
+export { hasUnsupportedPathCharacter, isPathWithin, normalizeAbsolutePath } from "./path.js";
 export { findCommonAncestor } from "./common-ancestor.js";

packages/core/src/utils/path.ts

@@ -52,6 +52,11 @@ export const isPathWithin = (base: string, target: string): boolean => {
 	const normalizedTarget = normalizeAbsolutePath(target);
 
 	return (
-		normalizedBase === "/" || normalizedTarget === normalizedBase || normalizedTarget.startsWith(`${normalizedBase}/`)
+		normalizedBase === "/" ||
+		normalizedTarget === normalizedBase ||
+		normalizedTarget.startsWith(`${normalizedBase}/`)
 	);
 };
+
+export const hasUnsupportedPathCharacter = (value: string) =>
+	value.includes("\u0000") || value.includes("\n") || value.includes("\r");