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* fix(windows): read command lines from the kernel, not each process's PEB MDE incident D scored Orca for suspicious memory activity: the vendored `@vscode/windows-process-tree` recovered every process's command line by opening it with `PROCESS_QUERY_INFORMATION | PROCESS_VM_READ` and chaining three `ReadProcessMemory` calls through the PEB and `RTL_USER_PROCESS_PARAMETERS`. On a 750ms/2s cadence over the whole table that is the credential-dumping primitive, whatever the intent. Windows 8.1 added `NtQueryInformationProcess`'s `ProcessCommandLineInformation` class (60), which returns the same string as a kernel-built `UNICODE_STRING` under `PROCESS_QUERY_LIMITED_INFORMATION` alone. Electron's floor is Windows 10, so every supported OS has it. The PEB reader stays behind a process-wide latch that only `STATUS_INVALID_INFO_CLASS`/`NOT_SUPPORTED`/`NOT_IMPLEMENTED` can set; a pid that merely denied a handle does not re-arm it, because `PROCESS_QUERY_INFORMATION` implicitly grants the limited right and so cannot be obtained where the weaker open already failed. The same hunk drops `PROCESS_VM_READ` from `GetProcessMemoryUsage` and `GetCpuUsage`, which acquired it and never read an address space. Measured on Windows 11 (514 processes), counted in-process by swapping the addon's import table entries for counting stubs, per CommandLine scan: `ReadProcessMemory` 1128 -> 0, desired access 0x0410 -> 0x1000, p50 12.7ms -> 9.3ms. Command lines were byte-identical on every process both readers recovered (376/376, 379/379 across runs), including a 24,068-character argv with quotes, non-ASCII and trailing whitespace, and a WOW64 target. Three processes that refused the old rights granted the new one; none went the other way. * chore(deps): refresh the windows-process-tree patch hash in the lockfile * fix(windows): drop the PEB fallback and detect the unpatched prebuilt Review of #17886 found three ways the reader could still perform, or silently resume, the primitive it exists to remove. The class-missing latch was a permanent, process-wide, one-way downgrade back to the PEB read, and any single target returning STATUS_INVALID_INFO_CLASS / NOT_SUPPORTED / NOT_IMPLEMENTED could trip it. On an EDR-hooked ntdll -- the entire premise of this change -- a hook that does not recognise class 60 would have restored PROCESS_VM_READ plus three ReadProcessMemory per pid per scan for the life of the process, unobservably, on precisely the machines this was written for. The fallback is deleted rather than guarded: GetProcessCommandLine now returns false and leaves the command line empty, which callers already handle, so the addon imports no ReadProcessMemory at all. That absence is what makes the property checkable on the artifact. The published 0.8.0 tarball ships a loadable prebuilt built from unpatched source; it is node-addon-api, so a bare require() accepts it, allowBuilds is false and CI installs with --ignore-scripts, and a rebuild that soft-exits on a Windows file lock leaves it in place. Source-text guards could never see it. windowsProcessTreeAddonReadsProcessMemory() checks the compiled binary instead, and is wired into the install check, the rebuild, and the relay build. The repair itself never worked: `git apply` run inside a work tree prefixes patch paths with the cwd-relative prefix, skips what does not match, and exits 0, so the branch always fell through to its own post-check throw. The package dir is always under the project root, while the fixture that covered it was in %TEMP%, outside any repo. Blinding git with GIT_DIR fixes it, and the test now runs inside a real work tree. Also from review: bounds-check the returned UNICODE_STRING against the allocation (not the size the second query clobbers) and cap the probe so a bogus length cannot bad_alloc a whole scan; test NT_SUCCESS explicitly; value- initialize ProcessInfo, which left `memory` as stack garbage -- measured, 82 processes reported the same bogus working set; and correct a comment in windows-process-table.ts that still described the command line as a PEB read. Re-measured on Windows 11 (543 processes): ReadProcessMemory 1128 -> 0, with the symbol absent from the import table so the IAT hook finds no slot to count; desired access 0x0410 -> 0x1000 on all 543 opens; p50 13.5 -> 12.3ms; 405/405 command lines byte-identical including a 24,087-character quoted non-ASCII argv and a WOW64 target; 3 processes recovered only by the new path, 0 only by the old. * chore(deps): refresh the windows-process-tree patch hash in the lockfile * test(scripts): stage a script's local imports into the native-runtime fixture ensure-native-runtime.mjs gained an import of windows-process-tree-gyp-rebuild.mjs, but the fixture copied only the script itself, so every case in the suite died with ERR_MODULE_NOT_FOUND before reaching its own assertions. copyScriptWithLocalModules already walks a script's co-located imports for exactly this reason -- its own doc comment names this failure -- so use it rather than listing files by hand. The two Windows cases still fail here, on a missing node-pty ConPTY runtime that also fails on main; this only stops a resolution error from standing in front of whatever they were meant to catch. * fix(windows): route a locked stale addon to the Windows file-lock message `pnpm install` with Orca running aborted with a raw EPERM stack. The stale-binary guard -- which deletes an addon that still imports ReadProcessMemory so a skipped rebuild cannot use it -- ran outside the try whose catch classifies Windows file locks, and whose message is literally "Close running Orca/Electron/dev processes for this worktree": exactly this situation. Measured rather than assumed: rmSync against a loaded (memory-mapped) addon throws EPERM, and `force: true` does not help, since it only swallows ENOENT. Cold copies of the same file delete fine. So the delete threw a page before the handler that knows what it means. Moving the guard inside the try is the whole fix; the classifier already matches the EPERM text. The new case runs the real script against a temp project whose stale addon is held open by a live child process, and fails against the old placement with the raw `syscall: 'rm'` stack the report described. * feat(windows): warn once when command-line recovery is refused host-wide Removing the PEB fallback removed a total-defeat vector, but it left a cliff: if NtQueryInformationProcess(ProcessCommandLineInformation) is refused -- a hooked ntdll that does not know class 60 -- every command line comes back empty and agent identity matching silently degrades to image names. The addon still loads and still enumerates, so every health check the app has stays green. A cliff nobody can see is the failure mode this area keeps producing. The querying process is the unambiguous probe. A process can always open itself with PROCESS_QUERY_LIMITED_INFORMATION, so its own command line coming back empty means the query is refused for every process -- not that some target denied a handle, which is normal for roughly a quarter of the table. Keying on our own row rather than a fraction means no threshold to tune and no false positive on a hardened box where most processes deny. One warning per session, gated on the CommandLine flag actually being requested so a future identity-only reader cannot trip it. The suite's own SELF fixture gains a command line for the same reason: a self row without one is the alarm, not a detail. * fix(windows): check the relay's staged addon at load, and answer tri-state Two gaps in the ReadProcessMemory check, both about what it does not see. It only ever looked at node_modules/@vscode/windows-process-tree. A relay host has no node_modules of ours: it loads ./windows-process-tree.node staged beside the bundle. The relay build asserts the symbol on the artifact it produces, but a bundle and the addon beside it redeploy independently, so a host that has not taken a new bundle keeps whatever binary is already there -- and the published prebuilt is node-addon-api, so it binds cleanly and then walks every process's address space. loadWindowsProcessTree now checks that file too and refuses it, falling back to the CIM scan: slower, but not the thing an EDR quarantines a host for. The predicate is duplicated rather than imported, because the config-script copy is install-time tooling that drags in node-gyp and child_process, and this module is bundled into the app and the relay. And it returned false for a binary that is not there. All three callers happened to be safe, but the name read as a safety predicate, so a future caller would take a missing binary as verified. inspectWindowsProcessTreeAddon() now answers clean/unpatched/missing over an explicit binary path -- which is also what lets the relay's staged addon be checked at all -- and each caller states which state it acts on. Both are covered by cases that fail against the old code: without the load-time check the unpatched staged addon is bound and the CIM fallback never runs, and with 'missing' folded back into 'clean' the absence case fails outright. * test(windows): load the addon in beforeAll, not at collection time loadAddon() ran while the file was being collected, so on a Windows checkout with no built addon the require threw before any case existed and took the seven patch-text cases down with it -- cases that read only the patch file and need no binary at all. Verified both ways against a deliberately unresolvable addon path: at collection time vitest reports "no tests" for the file; from beforeAll the seven text cases pass and only the three addon cases go. * fix(deps): normalize the windows-process-tree patch to LF and let pnpm own its hash `pnpm install --frozen-lockfile` failed on this branch on every platform with ERR_PNPM_LOCKFILE_CONFIG_MISMATCH, which breaks CI and the release build. Two coupled defects. The patch file was committed with CRLF -- 174 CR bytes, against zero on main -- and `.gitattributes` pins `/config/patches/*.patch -text` precisely so checkout cannot convert it, so those bytes reached every runner. And pnpm hashes a patch **LF-normalized**, so the raw sha256 of a CRLF file is a value pnpm never computes: raw sha256 322965470c05f63d8527f7d8e892ee26ee444136b66b57fd64c362a9f2ff05d1 LF-normalized f8ea245391c94da5770045aeea01fa6de466c2199c6ef46b5b769b398aa9823e The lockfile carried the raw one, at all three sites. It is the only one of the seven patches where the two digests differ, which is why the other six passed. Normalized the patch to LF and took pnpm's own value from `pnpm install --no-frozen-lockfile`; nothing here is hand-computed. With the file LF-only the two interpretations coincide, so the lockfile, the contract test's no-CR assertion and its hash assertion all agree at one number -- and `config/scripts/windows-process-tree-patch-contract.test.mjs`, which was red on this branch for the same reason, is green again. The lockfile diff is exactly the three hash lines. The regression check is the installer, not a digest. Two separate reviews "verified" the shipped hash by recomputing sha256(patchBytes) and matching the lockfile; both were wrong, because both repeated the same wrong assumption about which bytes pnpm hashes. A check that reproduces the original mistake is not independent. So the new case runs `pnpm install --frozen-lockfile --lockfile-only --ignore-scripts` against a copy of the manifest, lockfile and patches, and asserts exit 0 -- verified by deletion: restoring the shipped hash fails it with the exact ERR_PNPM_LOCKFILE_CONFIG_MISMATCH from the branch's package (windows) job. Also corrected the `.gitattributes` comment claiming pnpm hashes patches byte-for-byte. The `-text` setting is right -- `git apply` needs the exact bytes -- but that sentence is the claim that produced the wrong hash twice. * ci(windows): run the process-tree patch suites in CI Both suites only self-skip off Windows, so the binary-level check that the addon carries no ReadProcessMemory passed vacuously in every lane. * fix(windows): force core.autocrlf=input for the patch repair My LF normalization of the windows-process-tree patch broke the `git apply` repair path introduced in this PR. The two are coupled and I checked only one. Those 174 CR bytes were not editor noise. They sat on exactly the pre-image lines and nowhere else -- 107/107 in src/process.cc, 67/67 in src/process_commandline.cc, 0 on every added or context line -- because @vscode/windows-process-tree@0.8.0 ships those two sources as CRLF. Normalizing the patch made its pre-image stop matching the file it is applied against. Measured, reconstructing the true CRLF pre-image from the pre-normalization blob and applying the current LF patch: core.autocrlf plain -c core.autocrlf=input true exit 0 exit 0 input exit 0 exit 0 false exit 1 exit 0 `false` is Git's own built-in default and what "checkout as-is" selects in the Git for Windows installer -- on this box the `true` that hides it comes from the installer's system gitconfig, not from anything in the repo. There the repair throws, ensureWindowsProcessTreeCommandLinePatch reports "still reads the PEB, and repairing it ... failed", isWindowsNativeLockError does not match that text, and `pnpm install` dies with no path forward. Forcing the mode rather than `--ignore-whitespace`: both fix every cell and both leave the applied file fully LF, but `input` relaxes line endings only, so a hunk whose real content drifted is still rejected. The repair rewrites a security-relevant source file; it should stay strict about everything except the thing that is legitimately ambiguous. Not reverting the patch to CRLF: windows-process-tree-patch-contract.test.mjs (pre-existing on main) forbids CR bytes in it, and pnpm computes the same hash either way. LF plus the forced mode is the end state. The suite could not have caught this. The fixture built its pre-image from the patch itself and joined with '\n', so fixture and patch agreed by construction on any encoding -- once again a test that passes without its fix. It now emits the CRLF the real package ships, and the case runs under both autocrlf modes pinned through a temp HOME gitconfig, because the repair blinds git to the repo and so reads global config. Verified by deletion in both directions: with the flag removed the autocrlf=false case fails with the exact "still reads the PEB" dead end while autocrlf=true still passes, and with the fixture back on LF all eight cases pass with no fix present at all. Also corrected the .gitattributes comment I added last commit. It said `git apply` needs the bytes the patch was written against, which is now false -- the pinned bytes are LF and the bytes it was written against are CRLF. That is the same class of confident-and-wrong claim that produced the bad hash twice. * fix(windows): assert the rebuilt addon, and install the patch for real in tests Three follow-ups from review. **The packaged binary had no check.** The relay build asserts its own artifact and ensure-native-runtime asserts what it loads, but nothing looked at the addon copied into the packaged app -- so a rebuild that silently produced the upstream reader shipped. `rebuild-native-deps.mjs` now asserts `clean` on it after `rebuild()`. This is also the caller D4's tri-state was missing: every existing site branches on `=== 'unpatched'`, so `missing` still behaved exactly like `clean` everywhere, which was the thing making it a state rather than a boolean. Here both non-clean states fail, and they fail differently: after a rebuild that reported success, an absent binary is a broken build, not an absence to shrug at. The fake `rebuild()` had to start producing a binary for that to mean anything, so it now emits stand-in bytes and takes `addon: 'clean' | 'unpatched' | 'none'`. Verified by deletion: with the assertion removed both new cases pass. **The frozen-install case could not see a patch at all.** `--lockfile-only` resolves and never applies one, so its coverage stops at hash consistency. Added a case that installs `@vscode/windows-process-tree@0.8.0` for real with the patch and asserts the materialized `src/process_commandline.cc` carries the marker and no longer carries `ReadProcessMemory` -- about 1.5s for the pair. Correcting the brief on that one: it does **not** catch the `git apply` breakage from the previous commit. Measured -- with `-c core.autocrlf=input` removed it passes cleanly, because `pnpm install` uses pnpm's own patch applier and never runs our repair script. What it does catch is a patch pnpm can no longer apply: corrupting one pre-image line fails both cases. The repair path stays covered by the CRLF fixture in rebuild-native-deps-node-pty.test.mjs. Worth recording, since it decides whether the LF normalization was safe at all: pnpm applies the LF patch to the CRLF tarball sources without complaint, and materializes them as LF with the marker present and `ReadProcessMemory` absent. The primary install path was never affected -- only the `git apply` fallback was. **Dead timeout.** The frozen-install case passed `timeoutMs: 300_000` to the spawn while vitest capped the case itself at 30s, so on a cold runner vitest would have killed it first. Both cases now declare the budget they use. * test(windows): route the frozen-install check through the pnpm invocation owner The new patched-dependencies check hand-rolled a PATH walk naming 'pnpm.cmd', which the windows batch shim spawn boundary ratchet rejects: pnpm-cli-invocation already owns that decision for every other script, and its allowlist only shrinks. Reuse resolvePnpmCliInvocation for the command and prefixArgs, and the shared resolveCliCommand for the presence check, so no shim name is spelled here. Its `shell` flag is dropped because runProcessSync refuses it and already drives a shim through the interpreter itself. --------- Co-authored-by: Orca Worker <orca-worker@localhost> Co-authored-by: Neil <4138956+nwparker@users.noreply.github.com>