148 lines
5.3 KiB
Diff
148 lines
5.3 KiB
Diff
From 6dc693737f84785a30238ca7640ad8ba605c0eac Mon Sep 17 00:00:00 2001
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From: Damien Neil <dneil@google.com>
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Date: Sat, 7 Oct 2023 05:16:27 +0800
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Subject: [PATCH] [Backport] net/http: regenerate h2_bundle.go
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Offering: Cloud Core Network
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CVE: CVE-2023-39325
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Reference: https://go-review.googlesource.com/c/go/+/534255
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Pull in a security fix from x/net/http2:
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http2: limit maximum handler goroutines to MaxConcurrentStreamso
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Note: The upstream does not submit this change to go1.17 according to the rules of MinorReleases.
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Corego3.x are based on go1.17.8. Therefore, it need to submit the change to corego3.x.
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Edited-by: machangwang m00509938
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For #63417
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Fixes #63426
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Fixes CVE-2023-39325
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Change-Id: I6e32397323cd9b4114c990fcc9d19557a7f5f619
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Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/2047401
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Reviewed-by: Tatiana Bradley <tatianabradley@google.com>
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TryBot-Result: Security TryBots <security-trybots@go-security-trybots.iam.gserviceaccount.com>
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Run-TryBot: Damien Neil <dneil@google.com>
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Reviewed-by: Ian Cottrell <iancottrell@google.com>
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Reviewed-on: https://go-review.googlesource.com/c/go/+/534255
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Reviewed-by: Damien Neil <dneil@google.com>
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TryBot-Bypass: Dmitri Shuralyov <dmitshur@google.com>
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Reviewed-by: Michael Pratt <mpratt@google.com>
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Auto-Submit: Dmitri Shuralyov <dmitshur@google.com>
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Signed-off-by: Ma Chang Wang machangwang@huawei.com
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---
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src/net/http/h2_bundle.go | 62 +++++++++++++++++++++++++++++++++++++--
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1 file changed, 60 insertions(+), 2 deletions(-)
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diff --git a/src/net/http/h2_bundle.go b/src/net/http/h2_bundle.go
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index 5433ebdc51..b87d14b6ea 100644
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--- a/src/net/http/h2_bundle.go
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+++ b/src/net/http/h2_bundle.go
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@@ -4181,9 +4181,11 @@ type http2serverConn struct {
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advMaxStreams uint32 // our SETTINGS_MAX_CONCURRENT_STREAMS advertised the client
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curClientStreams uint32 // number of open streams initiated by the client
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curPushedStreams uint32 // number of open streams initiated by server push
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+ curHandlers uint32 // number of running handler goroutines
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maxClientStreamID uint32 // max ever seen from client (odd), or 0 if there have been no client requests
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maxPushPromiseID uint32 // ID of the last push promise (even), or 0 if there have been no pushes
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streams map[uint32]*http2stream
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+ unstartedHandlers []http2unstartedHandler
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initialStreamSendWindowSize int32
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maxFrameSize int32
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headerTableSize uint32
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@@ -4577,6 +4579,8 @@ func (sc *http2serverConn) serve() {
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return
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case http2gracefulShutdownMsg:
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sc.startGracefulShutdownInternal()
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+ case http2handlerDoneMsg:
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+ sc.handlerDone()
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default:
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panic("unknown timer")
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}
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@@ -4622,6 +4626,7 @@ var (
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http2idleTimerMsg = new(http2serverMessage)
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http2shutdownTimerMsg = new(http2serverMessage)
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http2gracefulShutdownMsg = new(http2serverMessage)
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+ http2handlerDoneMsg = new(http2serverMessage)
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)
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func (sc *http2serverConn) onSettingsTimer() { sc.sendServeMsg(http2settingsTimerMsg) }
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@@ -5584,8 +5589,7 @@ func (sc *http2serverConn) processHeaders(f *http2MetaHeadersFrame) error {
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sc.conn.SetReadDeadline(time.Time{})
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}
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- go sc.runHandler(rw, req, handler)
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- return nil
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+ return sc.scheduleHandler(id, rw, req, handler)
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}
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func (st *http2stream) processTrailerHeaders(f *http2MetaHeadersFrame) error {
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@@ -5832,8 +5836,62 @@ func (sc *http2serverConn) newWriterAndRequestNoBody(st *http2stream, rp http2re
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return rw, req, nil
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}
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+type http2unstartedHandler struct {
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+ streamID uint32
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+ rw *http2responseWriter
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+ req *Request
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+ handler func(ResponseWriter, *Request)
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+}
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+
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+// scheduleHandler starts a handler goroutine,
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+// or schedules one to start as soon as an existing handler finishes.
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+func (sc *http2serverConn) scheduleHandler(streamID uint32, rw *http2responseWriter, req *Request, handler func(ResponseWriter, *Request)) error {
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+ sc.serveG.check()
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+ maxHandlers := sc.advMaxStreams
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+ if sc.curHandlers < maxHandlers {
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+ sc.curHandlers++
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+ go sc.runHandler(rw, req, handler)
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+ return nil
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+ }
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+ if len(sc.unstartedHandlers) > int(4*sc.advMaxStreams) {
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+ return http2ConnectionError(http2ErrCodeEnhanceYourCalm)
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+ }
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+ sc.unstartedHandlers = append(sc.unstartedHandlers, http2unstartedHandler{
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+ streamID: streamID,
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+ rw: rw,
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+ req: req,
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+ handler: handler,
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+ })
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+ return nil
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+}
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+
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+func (sc *http2serverConn) handlerDone() {
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+ sc.serveG.check()
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+ sc.curHandlers--
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+ i := 0
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+ maxHandlers := sc.advMaxStreams
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+ for ; i < len(sc.unstartedHandlers); i++ {
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+ u := sc.unstartedHandlers[i]
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+ if sc.streams[u.streamID] == nil {
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+ // This stream was reset before its goroutine had a chance to start.
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+ continue
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+ }
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+ if sc.curHandlers >= maxHandlers {
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+ break
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+ }
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+ sc.curHandlers++
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+ go sc.runHandler(u.rw, u.req, u.handler)
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+ sc.unstartedHandlers[i] = http2unstartedHandler{} // don't retain references
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+ }
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+ sc.unstartedHandlers = sc.unstartedHandlers[i:]
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+ if len(sc.unstartedHandlers) == 0 {
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+ sc.unstartedHandlers = nil
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+ }
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+}
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+
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// Run on its own goroutine.
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func (sc *http2serverConn) runHandler(rw *http2responseWriter, req *Request, handler func(ResponseWriter, *Request)) {
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+ defer sc.sendServeMsg(http2handlerDoneMsg)
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didPanic := true
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defer func() {
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rw.rws.stream.cancelCtx()
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--
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2.33.0
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