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node:net: fix tls.connect({ socket }) and onread on a readable: false socket - #42265
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… socket
Since the Socket constructor passes `readable: false` to the Duplex, such
a socket starts with its readable side ended, as in node. Two paths still
assumed the socket reads:
- tls.connect({ socket }) over it died with ERR_STREAM_PUSH_AFTER_EOF
right after 'secureConnect' and delivered no data. Once TLS adopts the
fd, the raw half keeps reporting the connection's ciphertext to the
wrapped net.Socket, which pushed it into its ended Readable and tore the
transport down. node's TLSWrap takes over the handle's reads, so the
wrapped socket never sees those bytes: the raw half's data is now
dropped before the push and before the onread callback. Its bytesRead
and idle timer are still updated. A wrapped socket with an onread
buffer no longer receives the ciphertext either.
- net.connect({ readable: false, onread }) never called onread. node's
read() and resume() start the handle whenever an onread buffer is set,
whatever the Readable state, so the readableEnded checks in resume(),
read() and afterConnect() now exempt onread sockets.
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@robobun adopt |
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Included review availability: Your plan provides up to 10 included reviews per hour; 3 remain after this review. WalkthroughThe change updates Node-compatible socket read handling for ChangesSocket read and TLS integration
Suggested reviewers: Priority: ➖ Normal Severity of issue fixed: Medium Merge Risk: ⚪ Minimal · up to The reviewed socket and TLS changes have no unresolved merge-blocking risk. 🚥 Pre-merge checks | ✅ 3 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (3 passed)
Full details: Out of Scope Changes checkExplanation The PR also changes generic
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Inline comments:
In `@test/js/node/tls/node-tls-upgrade.test.ts`:
- Line 65: Replace the parameterized test.each usage with describe.each for the
TLS cases, and define the individual test() inside each generated suite. Follow
the existing test/CLAUDE.md convention while preserving the current test cases
and assertions.
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src/js/node/net.tstest/js/node/net/node-net.test.tstest/js/node/tls/node-tls-upgrade.test.ts
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I reviewed this PR and didn't find any bugs. The kAdoptedTLSRaw guards and the kOnreadBuffer carve-outs look correct and well-cited, but since this threads through the TLS-adoption and read-start/stop paths in node:net — and interacts with #42262 at the same site — a human look is still worthwhile.
What was reviewed:
- Confirmed all three
pushDataToSocketcallers still run_unrefTimer()/bytesRead += ...before the new early return, matching the PR's stated intent. - Checked the
onreaddata handler drops TLS bytes after_unrefTimer()and before anykOnreadTailbuffering, so no ciphertext is stashed for later delivery. - Verified the three
readableEndedcarve-outs are consistent (resume,read,afterConnect) and mirror Node'stryReadStartgating onkBuffer. - Tests follow harness conventions:
port: 0,127.0.0.1,Promise.withResolverswith error/close wired to reject, try/finally cleanup,test.eachfor the matrix.
Extended reasoning...
Overview
This PR touches src/js/node/net.ts (four small conditional edits) and adds two tests. It fixes two related edge cases: (1) once TLS adopts a raw net.Socket's fd, ciphertext arriving on the raw half is no longer pushed into the wrapped socket's Readable or handed to its onread callback; (2) a socket constructed with readable: false but with an onread buffer now still starts the underlying handle's read loop, matching Node's tryReadStart which keys on kBuffer regardless of Readable state. The readableEnded early-outs in resume(), read(), and the post-afterConnect pause check each gain a this[kOnreadBuffer] !== undefined carve-out, and pushDataToSocket plus the onread-path data handler each gain a socket[kAdoptedTLSRaw] early return.
Security risks
None identified. The change does not weaken any TLS verification or handshake path — it only stops delivering TLS record bytes to the wrapped plain socket's stream/onread after the TLS layer has taken over the fd, which is a data-routing correctness fix (the plaintext still flows through the TLS socket exactly as before). The onread carve-out only affects when the native handle's read loop is (re)started; it does not bypass any security gate. No credential handling, no auth, no crypto primitives are touched.
Level of scrutiny
Moderate-to-high. src/js/node/net.ts is one of the most intricate Node-compat modules in Bun, and the TLS-over-existing-socket path (kAdoptedTLSRaw) has historically been a source of subtle ordering/lifecycle bugs. The individual edits are each small and well-cited against nodejs/node source, but they sit at the intersection of pause/resume, backpressure, onread, and TLS adoption, and the PR description itself notes a same-site conflict with a parallel open PR (#42262). That combination warrants a maintainer glance rather than an auto-approve.
Other factors
The bug hunt ran to a dry streak with no findings and no ruled-out candidates. The new tests are well-constructed per repo conventions (port 0, loopback bind, error/close wired to reject the awaited promise, try/finally cleanup, test.each matrix, exact toBe/toEqual assertions). No CODEOWNERS entry covers these paths. I checked that all three pushDataToSocket call sites update bytesRead and _unrefTimer() before the new guard, so the PR's claim that those are still maintained holds. The onread data handler places the guard after _unrefTimer() but before kOnreadTail buffering, so no ciphertext is stashed for later replay via drainOnreadTail.
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Checked this against #42262 (same TLS regression, opened in parallel). This PR covers everything mine did and more, so I am closing #42262 in favor of it. What I ran, on a debug (ASAN) build with this branch's
Difference in approach, for the record: #42262 guarded |
A TLS wrap over a net.Socket must leave nothing in that socket's readable buffer, and must hand nothing to 'data' listeners that stay attached across the upgrade (client side and server side).
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Updated 9:12 PM PT - Sep 10th, 2026
✅ @robobun, your commit 39226405f13ec4c60f8f90fd7d7bdc7af3883784 passed in 🧪 To try this PR locally: bunx bun-pr 42265That installs a local version of the PR into your bun-42265 --bun |
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@robobun fix conflicts |
…alse-tls-onread # Conflicts: # src/js/node/net.ts
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Done in 3922640 (a merge of main, no force push). The conflict was with #42128, which added the On the merged tree these pass: |
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A note on how this PR and #42304 fit together. #42304 fixes #42304 counts per slice inside The early return that this PR adds to the The fix is one line in this PR's early return: if (socket[kAdoptedTLSRaw]) {
self.bytesRead += buffer.length;
return;
}I checked it on a debug build with both diffs applied,
The line is also correct on this branch alone, and it is safe whichever PR lands first. It does what the callers of If this PR lands first without the line, I add the line and the test to #42304 when I rebase. |
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@robobun this PR fix all that is needed? |
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Yes, for what this PR targets. CI is green on the current head (build #114125) and the PR is mergeable. Fixed, and checked against node v26.3.0
Not covered here. None of these comes from this PR
#42262 (the parallel PR) is closed, so no other open PR changes these lines except #36534. |
) Follow-up to #42304 (closed in favor of #42313). Stacked on #42313. Tests only. ### Problem - #42313 moves `bytesRead` to a counter on the native socket. Its TLS upgrade path has no test: the `raw` half of the `[raw, tls]` pair inherits the count of the handle it replaces. - On main one case of that path is wrong. A `net.Socket` with an `onread` buffer that `tls.connect({ socket })` wraps reports `bytesRead === 0`. Node v26.3.0 reports 3055, the TLS records. ### Fix - 4 tests in `test/js/node/tls/node-tls-upgrade.test.ts`. Three rows (`no reader`, `readable: false`, `an onread buffer`) check that the wrapped socket counts the TLS records: `tlsSocket.bytesRead` is 6, `raw.bytesRead` is greater. - One STARTTLS test checks both wrapped sockets. The count right after the upgrade equals the count before it (2 on the client, 8 on the server). Then it grows. - Verified on a debug build, expected values from node v26.3.0. With #42313's `src/` all 9 tests of the file pass. With main's `src/` (4b5862f) the `an onread buffer` row fails with `Expected: > 6, Received: 0`. ### Background - `tls.connect({ socket })` and `new tls.TLSSocket(socket, { isServer: true })` run TLS over an existing `net.Socket`. Bun's native `upgradeTLS` turns the TCP handle into a `[raw, tls]` pair over one fd. The wrapped socket keeps `raw`, which sees the ciphertext. - In node the upgrade keeps the handle, and the handle counts each read before `TLSWrap` consumes it. So `socket.bytesRead` goes on from its value before the upgrade. - `onread: { buffer, callback }` makes a socket read into `buffer` and call `callback(nread, buffer)`. <details><summary>Notes</summary> **Why a separate PR.** #42313 had a CI run in progress and no human review yet. A push there restarts the run. If the tests are wanted inside #42313, cherry-pick a6cbad9. **After #42313 merges** I rebase this branch on main, so that it holds the one test commit only. **Why the `onread` row is 0 on main.** The `data` handler that the `onread` option installs never added to `bytesRead` (#42304 was the JS fix for that). #42265 then added an early return for the wrapped socket to that handler, before the deliver loop. #42313 counts on the handle before any JS handler runs, so the row passes there. **Probe numbers** (`tls.connect({ socket: raw })`, the server sends `"banner"`): | | node v26.3.0 | main (4b5862f) | #42313 (d2dd882) | |---|---|---|---| | `raw.bytesRead`, no `onread` | 3055 | 2813 | 2813 | | `raw.bytesRead`, `raw` has `onread` | 3055 | 0 | 2813 | | calls of the `onread` callback | 0 | 0 | 0 | STARTTLS probe (plaintext `greeting\n`, `go`, `ok\n`, then TLS in both directions). Client `raw.bytesRead`: 12 before, 12 right after the upgrade, at the end 3027 in node and 2821 in bun. Server: 2, 2, then 1720 in node and 1588 in bun. Bun 1.4.3, main and #42313 print the same numbers for this probe. Node and bun differ in the size of the handshake, so the tests compare against the plaintext count and not against a fixed number. </details>
…cket it wraps (#42487) ### Problem - `new tls.TLSSocket(socket, { isServer: true })` and `tls.connect({ socket })` wrap a connected `net.Socket`. When the connection closes, the wrapped socket reports events that belong to the TLS socket: `'end'` and `'finish'` on a close, `'error'` on a peer reset. Node emits only `'close'` on it. - Its `'close'` then destroys the TLS socket early. After `raw.end()`, `finished(tlsSocket)` reports `ERR_STREAM_PREMATURE_CLOSE`. Regression from #39066 and #42265. - Cause: the native close calls the wrapped socket's close handler first (`ServerHandlers.close`, `src/js/node/net.ts:1052`). It reports its own EOF or read error and closes. Its `'close'` runs `onUpgradedClose` (`net.ts:413`), which destroys the TLS socket. ### Fix - A wrapped socket's close handler reports nothing (`closeWithTLSSocket`). The TLS socket's close handler runs next and reports the EOF or the error. - The TLS socket closes the wrapped socket at `'end'`, or from `_destroy` after it queued its `'error'`. `destroy(err)` gives node's order: `tls error`, `raw close`, `tls close`. - Node does the same: `TLSWrap` owns the reads ([wrap.js#L723-L727](https://github.com/nodejs/node/blob/v26.3.0/lib/internal/tls/wrap.js#L723-L727)) and `TLSWrap.close()` destroys the wrapped socket ([wrap.js#L676-L688](https://github.com/nodejs/node/blob/v26.3.0/lib/internal/tls/wrap.js#L676-L688)). - Verified: two `node:test` files, `node-tls-wrapped-socket-close.test.ts` (14 cells) and `node-tls-raw-end.test.ts` (4 tests, by @alii). Node v26.3.0 passes all 18. Bun 1.4.2 fails 11. Main's `src/` fails all 18. This branch passes all. ### Background - The TLS socket adopts the fd. The wrapped socket keeps a raw handle (`kAdoptedTLSRaw`). - Only the TLS handle gets native events. Its `on_close` (`src/runtime/socket/socket_body.rs`) calls the raw handle's close handler, then the TLS socket's. - A `close_notify` reaches only the TLS socket. These closes have none: after the TLS socket's own FIN, a peer reset, `destroy()` by the owner. <details><summary>Notes</summary> **Scope.** #39066 made the `'close'` of the wrapped socket destroy the TLS socket. #42265 emptied the buffer of the wrapped socket, so its `'end'` is no longer held back by unread TLS bytes. Two PRs landed on main after this one opened and repaired parts of the damage. #42293 removed the tick drain between the two close handlers, so the TLS socket gets its `'end'` and its reset error again. #42176 keeps unread data when the wrapped socket closes first. What is left on main: the wrapped socket still reports events of its own, a reset is still reported on it first with `hadError=true`, and `finished(tlsSocket)` fails after `raw.end()`. None of these PRs is in a release. **Test matrix.** Both files use `node:test` and `node:assert` only. Under bun, the last test of `node-tls-wrapped-socket-close.test.ts` runs the same file in Node.js. | | `node-tls-wrapped-socket-close.test.ts` (14 cells) | `node-tls-raw-end.test.ts` (4 tests) | |---|---|---| | Node.js v26.3.0, `node --test` | 14 pass (25 of 25 runs) | 4 pass | | Bun 1.4.2, `bun test` | 9 fail, 5 pass | 2 fail, 2 pass | | main b2ad29d, debug build of its `src/` | 14 fail | 4 fail | | this branch, debug + ASAN | 14 pass | 4 pass | The 5 cells that pass on Bun 1.4.2 are the `end()` cells with a TLS peer or after the handshake, and the unread-data cell. They broke on main after 1.4.2 (#39066, #42265). The other 9 were never right: 1.4.2 reports a reset on the wrapped socket, emits `raw end` and `raw finish` on `destroy(err)`, and in 4 cells never closes one of the sockets (those time out). **Traces.** Events of the two sockets on the observed side, in order. This branch prints node's trace in every cell. | cell | node v26.3.0 and this branch | main b2ad29d | |---|---|---| | server wrap, `end()` one tick or one `setImmediate` after the wrap, TLS or plain peer (4 cells) | `tls finish, tls end, raw close, tls close` | `tls finish, raw end, tls end, raw close, tls close` | | server wrap, `end()` after the handshake, peer answers `'end'` with `destroy()` | same as above | same as above | | `tls.connect({ socket })`, `end()` after the handshake, peer answers `'end'` with `destroy()` | same as above | same as above | | server wrap, peer answers `'end'` with 4 bytes then `destroy()`, nothing reads until the connection closed | `tls finish, (closed, unread=4), tls data late, tls end, raw close, tls close` | `tls finish, raw end, raw finish, raw close, (closed, unread=4), tls data late, tls end, tls close` | | server wrap, peer reset before or after the handshake (2 cells) | `tls error ECONNRESET, raw close, tls close hadError=true` | `raw error ECONNRESET, raw close hadError=true, tls error ECONNRESET, tls close hadError=true` | | `tls.connect({ socket })`, peer reset after the handshake | same as above | `raw error ECONNRESET, tls error ECONNRESET, tls close hadError=true, raw close hadError=true` | | `tlsServer.emit('connection', socket)`, peer reset before the handshake | `tlsClientError ECONNRESET, raw close, tls close hadError=true` | `raw error ECONNRESET, raw close hadError=true, tlsClientError ECONNRESET, tls close hadError=true` | | server wrap, owner calls `tlsSocket.destroy(err)` before or after the handshake (2 cells) | `tls error, raw close, tls close hadError=true` | `raw end, tls error, raw finish, raw close, tls close hadError=true` | | `tls.connect({ socket })`, owner calls `tlsSocket.destroy(err)` after the handshake | same as above | `raw end, tls error, raw finish, tls close hadError=true, raw close` | | server wrap, owner calls `raw.end()` (`node-tls-raw-end.test.ts`) | node: `raw finish, tls end, tls finish, finished ok, raw close, tls close`. This branch: `raw finish, tls end, raw close, tls finish, finished ok, tls close` | `raw finish, raw end, tls end, raw close, tls close, finished ERR_STREAM_PREMATURE_CLOSE` | In the last row this branch still closes the wrapped socket at the `'end'` of the TLS socket, so `raw close` comes before `tls finish`. Node closes it when the TLS socket is destroyed. That order is the same on main and is listed under "Not changed". **The order for `destroy(err)`.** The first version of this PR closed the wrapped socket from inside the native close, which runs inside `_destroy` before `_destroy` queues the `'error'`. The events were `raw close, tls error, tls close`. Now the close handler of the wrapped socket only records that the TLS socket owes the close (`kOwesRawClose`). `_destroy` pays it after `callback(err)`. A `_destroy` that deferred the close of its handle (a handshake failure closes it from a microtask) has returned by then, so the next tick pays it. In both cases the `'error'` is already queued. **Reset matrix.** Measured on the first commit against main b993710, before #42293. A matrix of 24 cells of resets. Three shapes: server wrap, socket injected into a `tls.Server`, client wrap. Two phases: before and after the handshake. Four placements of the `'error'` listener: on the wrapped socket, on the TLS socket, on both, on neither. The peer is always a node process. This branch printed node's trace in 20 cells. The 4 cells that differ are client wraps whose TLS socket has no `'error'` listener: node throws the ECONNRESET as an uncaught exception. Bun closes a socket with no `'error'` listener without an error, on every kind of socket. This PR does not change that. **Related PRs.** - #42293 (merged) made the TLS socket report a peer reset. Its two tests pass on this branch. - #42176 (merged) changed `onUpgradedClose` so that unread data survives. This PR does not touch that function. With this PR the wrapped socket no longer closes first in these cells, so that path is not reached. - #38028 moves the teardown of the wrapped socket into the TLS socket's `_destroy` for every wrap. It has conflicts with main. The `_destroy` call here covers only a wrapped socket whose fd has already closed. - #36534 changes the native upgrade so that the raw handle gets no JS dispatch. It has conflicts with main. If it lands, `closeWithTLSSocket` can go. The cells still apply to it, because they assert node's events only. **Not changed, same as main.** - `'end'` after a plain `destroy()`: bun emits one on plain `net` and `tls` sockets too. The fixture of #42181 documents it. A TLS socket that its owner destroys with no error still shows `tls end`. The wrapped socket no longer shows `raw end`. - A wrapped socket that its owner destroys directly (`raw.destroy()`): `tls end, tls finish, tls close, raw close`. Node: `raw close, tls close`. - When the TLS socket gets its `'end'` while the fd is still open (a peer that closes first with a `close_notify`, or `raw.end()`), `raw close` comes before `tls finish`. Node has `tls finish` first. - `destroy()` in the same tick as the wrap, before the fd is adopted, does not close the wrapped socket. That is #38028. - `end()` in the same tick as the wrap sends no FIN. That is #42339. **Platforms.** The first commit (11 cells, as a fixture spawned on bun and on node) was also built and run on Windows x64: a canary of main failed the 11 bun cells, the branch passed all. The `destroy(err)` cells and the `node:test` files were run on Linux x64 only. **Other suites on this branch.** All of `test/js/node/tls/`, `node-http2-upgrade.test.mts`, `socket-retention.test.ts`, and 508 vendored `test-tls-*`, `test-https-*`, `test-http2-*` files: 506 pass. The two others also fail on main: `test-https-timeout.js` (debug build only) and `test-tls-client-allow-partial-trust-chain.js` (needs the test runner). Also on main in this container: `node-tls-server.test.ts` "SNICallback runs even when the requested servername matches the bind hostname" (`localhost` resolves to `::1` first). </details> <!-- robobun:evidence:begin --> --- **[human-review]** gate passed · iteration 0 · 3 files touched <details><summary>fails on main (without fix)</summary> ```console ASAN without fix: 14 FAILED $ BUN_DEBUG_QUIET_LOGS=1 bun scripts/build.ts --profile=debug --quiet test "--reporter=junit" "--reporter-outfile=/tmp/pr_gate.xml" test/js/node/tls/node-tls-upgrade.test.ts bun test v1.4.3 (09bb546) test/js/node/tls/node-tls-upgrade.test.ts: (pass) should be able to upgrade a paused socket and also have backpressure on it #15438 [1654.06ms] (pass) tls.connect({ socket }) over a net.Socket with readable: false keeps the TLS bytes off the wrapped socket [334.63ms] (pass) tls.connect({ socket }) over a net.Socket with an onread buffer keeps the TLS bytes off the wrapped socket [113.54ms] (pass) tls.connect({ socket }) over a net.Socket with no reader keeps the TLS bytes off the wrapped socket [59.53ms] (pass) a STARTTLS exchange hands no TLS bytes to the 'data' listeners of the wrapped sockets (#32239) [164.21ms] 182 | ["net", "process.nextTick"], 183 | ["net", "setImmediate"], 184 | ])( 185 | "new TLSSocket(socket, { isServer }) end()s before the handshake completes, %s peer, from %s", 186 | async (peer, when) => { 187 | expect(await run("end-before-handshake", peer, when)).toEqual(eof); ... (truncated) release without fix: 14 FAILED bun test v1.4.3-canary.1 (09bb546) test/js/node/tls/node-tls-upgrade.test.ts: (pass) should be able to upgrade a paused socket and also have backpressure on it #15438 [55.44ms] (pass) tls.connect({ socket }) over a net.Socket with readable: false keeps the TLS bytes off the wrapped socket [6.04ms] (pass) tls.connect({ socket }) over a net.Socket with an onread buffer keeps the TLS bytes off the wrapped socket [2.90ms] (pass) tls.connect({ socket }) over a net.Socket with no reader keeps the TLS bytes off the wrapped socket [2.57ms] (pass) a STARTTLS exchange hands no TLS bytes to the 'data' listeners of the wrapped sockets (#32239) [3.81ms] 182 | ["net", "process.nextTick"], 183 | ["net", "setImmediate"], 184 | ])( 185 | "new TLSSocket(socket, { isServer }) end()s before the handshake completes, %s peer, from %s", 186 | async (peer, when) => { 187 | expect(await run("end-before-handshake", peer, when)).toEqual(eof); ^ error: expect(received).toEqual(expected) [ "tls finish", - "tls end", + "raw end", + "raw finish", "raw close hadError=false", "tls close ... (truncated) ``` </details> <details><summary>passes on PR (with fix)</summary> ```console ASAN with fix: all passed $ BUN_DEBUG_QUIET_LOGS=1 bun scripts/build.ts --profile=debug --quiet test "--reporter=junit" "--reporter-outfile=/tmp/pr_gate.xml" test/js/node/tls/node-tls-upgrade.test.ts bun test v1.4.3 (09bb546) test/js/node/tls/node-tls-upgrade.test.ts: (pass) should be able to upgrade a paused socket and also have backpressure on it #15438 [1471.02ms] (pass) tls.connect({ socket }) over a net.Socket with readable: false keeps the TLS bytes off the wrapped socket [236.85ms] (pass) tls.connect({ socket }) over a net.Socket with an onread buffer keeps the TLS bytes off the wrapped socket [84.87ms] (pass) tls.connect({ socket }) over a net.Socket with no reader keeps the TLS bytes off the wrapped socket [75.39ms] (pass) a STARTTLS exchange hands no TLS bytes to the 'data' listeners of the wrapped sockets (#32239) [188.67ms] (pass) the close of a connection under a TLS socket and the net.Socket it wraps (bun) > new TLSSocket(socket, { isServer }) end()s before the handshake completes, tls peer, from setImmediate [2170.33ms] (pass) the close of a connection under a TLS socket and the net.Socket it wraps (bun) > new TLSSocket(socket, { isServer }) end()s before the handshake comp ... (truncated) release with fix: all passed $ bun scripts/build.ts --profile=release [configured] bun-profile → bun (stripped) in 1157ms (unchanged) ninja: Entering directory `/workspace/bun/build/release' [1/125] gen JS modules (bundle-modules) Preprocess modules (8646ms) Bundle modules (67ms) Postprocesss modules (24ms) Bundle Functions (433ms) Generate Code (28ms) [9.20s] Bundled "src/js" for production 2600 kb 197 internal modules 13 native modules 50 internal functions across 16 files [1/8] cargo bun_runtime → libbun_runtime.a ^[[1m^[[92m Compiling^[[0m bun_core v0.0.0 (/workspace/bun/src/bun_core) ^[[1m^[[92m Compiling^[[0m bun_errno v0.0.0 (/workspace/bun/src/errno) ^[[1m^[[92m Compiling^[[0m bun_ptr v0.0.0 (/workspace/bun/src/ptr) ^[[1m^[[92m Compiling^[[0m bun_boringssl_sys v0.0.0 (/workspace/bun/src/boringssl_sys) ^[[1m^[[92m Compiling^[[0m bun_safety v0.0.0 (/workspace/bun/src/safety) ^[[1m^[[92m Compiling^[[0m bun_base64 v0.0.0 (/workspace/bun/src/base64) ^[[1m^[[92m Compiling^[[0m bun_cares_sys v0.0.0 (/workspace/bun/src/cares_sys) ^[[1m^[[92m Compiling^[[0m bun_zlib_sys v0.0.0 (/workspace/bun/src/zlib_sys) ^[[1m^[[92m Compiling^[[0m bun_zstd v0.0.0 (/workspace/bun/src/zstd) ^[[1m^[[92m Compi ... (truncated) ``` </details> <details><summary>diff hotspot</summary> ``` src/js/node/net.ts | 37 +++- test/js/node/tls/node-tls-upgrade.test.ts | 100 ++++++++++- .../node/tls/tls-wrapped-socket-close-fixture.mjs | 193 +++++++++++++++++++++ 3 files changed, 321 insertions(+), 9 deletions(-) ``` </details> **gate history** · 2 passed · 0 rejected · iteration 0 <details><summary>evidence per changed file</summary> ``` file reads edits tests src/js/node/net.ts 19 21 51 test/js/node/tls/node-tls-upgrade.test.ts 9 6 45 test/js/node/tls/tls-wrapped-socket-close-fixture.mjs 4 6 52 ``` </details> <!-- robobun:evidence:end --> --------- Co-authored-by: Alistair Smith <hi@alistair.sh>
4 participants
Fixes #32239.
Problem
tls.connect({ socket })over anet.Socketbuilt withreadable: falsereportsERR_STREAM_PUSH_AFTER_EOFon the wrapped socket during the handshake. That destroys the connection before any data arrives.pushDataToSocket(src/js/node/net.ts:443) pushes it into the ended Readable. The same leak calls a wrappedonread, re-enters'data'listeners left from STARTTLS (Invalid socket, tls.connect({ socket }) fails to intercept stream, causing subsequent data to re-trigger cleartext listeners and throw "Invalid socket" #32239), and fills a buffer that nothing reads.net.connect({ readable: false, onread })never callsonread. ThereadableEndedchecks from node:net: honor readable/writable in the Socket constructor so a write-only adopted fd stays open #42213 keep the handle stopped. Node starts it whenever anonreadbuffer is set (net.js#L830-L845).Fix
kAdoptedTLSRaw) is dropped before the push and before theonreadcallback. Node'sTLSWraptakes over the handle's reads (wrap.js#L723-L727), so the wrapped socket never sees the TLS stream. Its idle timer is still refreshed.readableEndedchecks inresume(),read()andafterConnect()exempt a socket with anonreadbuffer.node-tls-upgrade.test.ts(readable: false,onread, no reader, STARTTLS on both peers) andnode-net.test.ts(onread+readable: false). A build of main'ssrc/fails all five.Background
tls.connect({ socket })andnew tls.TLSSocket(socket, { isServer: true })adopt the connected fd. The native call returns a TLS handle and a raw handle. The raw handle stays on the originalnet.Socket(kAdoptedTLSRaw) and receives each ciphertext chunk.readable: falsestarts withendEmittedset, sopush()reportsERR_STREAM_PUSH_AFTER_EOF.onreadmakes anet.Socketread into the caller's buffer and skip the Readable.Notes
Repro 1, TLS over a
readable: falsesocketsecureConnect | data "banner" | data "echo:hi"secureConnect | data "bannerecho:hi"raw error ERR_STREAM_PUSH_AFTER_EOF | secureConnect | tls end | raw close | tls closeRepro 2,
onread+readable: false. Node'sread()/resume()start the handle whenever anonreadbuffer is set, whatever the Readable state, andafterConnectcallsread(0). Main reads nothing.Results against node v26.3.0
readable: falsebanner,echo:hiERR_STREAM_PUSH_AFTER_EOF, no databannerecho:hionread+readable: false"banner""""banner"onreadsocket, TLS bytes seen'data'calls on the wrapped sockets after the wrapreadableLengthafter a 16 MiB TLS transferInvalid socketon the third'data'callThe last three rows also fail on the released 1.4.3. They come from the same leak and are older than #42213.
More checks on this branch
bytesReadof the wrapped socket still counts the TLS bytes on the push path, like node (the TCP handle counts every byte it reads).setTimeout()on the wrapped socket does not fire while TLS traffic arrives every 100 ms, like node (_unrefTimer()still runs before the drop).end()first, each with a plain, areadable: falseand anallowHalfOpenwrapped socket.Suites
test/js/node/tls/node-tls-upgrade.test.ts(5),node-tls-connect.test.ts(55),node-tls-server.test.ts,test/js/node/net/node-net.test.ts,test/js/node/http2/node-http2-upgrade.test.mts(15),test/js/bun/net/socket-retention.test.ts(5),test/regression/issue/{12117,40401}.test.ts.test-tls-*/test-https-*files that wrap a socket in TLS.node-http2.test.js(380 pass) on the first commit. The second commit changes only tests.Related PRs
pushDataToSocketwhenreadableEnded. That fixes theERR_STREAM_PUSH_AFTER_EOFcase. It does not fixonread+readable: false, which comes from thereadableEndedchecks inresume()/read()/afterConnect(). It also still hands the TLS stream to a wrapped socket whose readable side is open or that has anonreadbuffer. Both PRs touch the top ofpushDataToSocket, so the one that lands second needs a one-line rebase.Not addressed here
bytesReadstays 0 on every socket built withonread, wrapped or not. Theonreaddata handler never counted. This is also the case on 1.4.3. It has its own report.'data'events. Withreadable: falseit emits none.no test proof · iteration 1 · platform-specific test(s) that do not run on this machine, deferring to CI, which covers all platforms: test/js/node/net/node-net.test.ts