rebase: bump golang.org/x/net from 0.6.0 to 0.7.0

Bumps [golang.org/x/net](https://github.com/golang/net) from 0.6.0 to 0.7.0.
- [Release notes](https://github.com/golang/net/releases)
- [Commits](https://github.com/golang/net/compare/v0.6.0...v0.7.0)

---
updated-dependencies:
- dependency-name: golang.org/x/net
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/golang.org/x/net/html/token.go

@@ -598,6 +598,11 @@ scriptDataDoubleEscapeEnd:
 // readComment reads the next comment token starting with "<!--". The opening
 // "<!--" has already been consumed.
 func (z *Tokenizer) readComment() {
+	// When modifying this function, consider manually increasing the suffixLen
+	// constant in func TestComments, from 6 to e.g. 9 or more. That increase
+	// should only be temporary, not committed, as it exponentially affects the
+	// test running time.
+
 	z.data.start = z.raw.end
 	defer func() {
 		if z.data.end < z.data.start {
@@ -611,11 +616,7 @@ func (z *Tokenizer) readComment() {
 	for {
 		c := z.readByte()
 		if z.err != nil {
-			// Ignore up to two dashes at EOF.
-			if dashCount > 2 {
-				dashCount = 2
-			}
-			z.data.end = z.raw.end - dashCount
+			z.data.end = z.calculateAbruptCommentDataEnd()
 			return
 		}
 		switch c {
@@ -631,12 +632,15 @@ func (z *Tokenizer) readComment() {
 			if dashCount >= 2 {
 				c = z.readByte()
 				if z.err != nil {
-					z.data.end = z.raw.end
+					z.data.end = z.calculateAbruptCommentDataEnd()
 					return
-				}
-				if c == '>' {
+				} else if c == '>' {
 					z.data.end = z.raw.end - len("--!>")
 					return
+				} else if c == '-' {
+					dashCount = 1
+					beginning = false
+					continue
 				}
 			}
 		}
@@ -645,6 +649,35 @@ func (z *Tokenizer) readComment() {
 	}
 }
 
+func (z *Tokenizer) calculateAbruptCommentDataEnd() int {
+	raw := z.Raw()
+	const prefixLen = len("<!--")
+	if len(raw) >= prefixLen {
+		raw = raw[prefixLen:]
+		if hasSuffix(raw, "--!") {
+			return z.raw.end - 3
+		} else if hasSuffix(raw, "--") {
+			return z.raw.end - 2
+		} else if hasSuffix(raw, "-") {
+			return z.raw.end - 1
+		}
+	}
+	return z.raw.end
+}
+
+func hasSuffix(b []byte, suffix string) bool {
+	if len(b) < len(suffix) {
+		return false
+	}
+	b = b[len(b)-len(suffix):]
+	for i := range b {
+		if b[i] != suffix[i] {
+			return false
+		}
+	}
+	return true
+}
+
 // readUntilCloseAngle reads until the next ">".
 func (z *Tokenizer) readUntilCloseAngle() {
 	z.data.start = z.raw.end

vendor/golang.org/x/net/http2/frame.go

@@ -662,6 +662,15 @@ func (f *Framer) WriteData(streamID uint32, endStream bool, data []byte) error {
 // It is the caller's responsibility not to violate the maximum frame size
 // and to not call other Write methods concurrently.
 func (f *Framer) WriteDataPadded(streamID uint32, endStream bool, data, pad []byte) error {
+	if err := f.startWriteDataPadded(streamID, endStream, data, pad); err != nil {
+		return err
+	}
+	return f.endWrite()
+}
+
+// startWriteDataPadded is WriteDataPadded, but only writes the frame to the Framer's internal buffer.
+// The caller should call endWrite to flush the frame to the underlying writer.
+func (f *Framer) startWriteDataPadded(streamID uint32, endStream bool, data, pad []byte) error {
 	if !validStreamID(streamID) && !f.AllowIllegalWrites {
 		return errStreamID
 	}
@@ -691,7 +700,7 @@ func (f *Framer) WriteDataPadded(streamID uint32, endStream bool, data, pad []by
 	}
 	f.wbuf = append(f.wbuf, data...)
 	f.wbuf = append(f.wbuf, pad...)
-	return f.endWrite()
+	return nil
 }
 
 // A SettingsFrame conveys configuration parameters that affect how

vendor/golang.org/x/net/http2/hpack/hpack.go

@@ -359,6 +359,7 @@ func (d *Decoder) parseFieldLiteral(n uint8, it indexType) error {
 
 	var hf HeaderField
 	wantStr := d.emitEnabled || it.indexed()
+	var undecodedName undecodedString
 	if nameIdx > 0 {
 		ihf, ok := d.at(nameIdx)
 		if !ok {
@@ -366,15 +367,27 @@ func (d *Decoder) parseFieldLiteral(n uint8, it indexType) error {
 		}
 		hf.Name = ihf.Name
 	} else {
-		hf.Name, buf, err = d.readString(buf, wantStr)
+		undecodedName, buf, err = d.readString(buf)
 		if err != nil {
 			return err
 		}
 	}
-	hf.Value, buf, err = d.readString(buf, wantStr)
+	undecodedValue, buf, err := d.readString(buf)
 	if err != nil {
 		return err
 	}
+	if wantStr {
+		if nameIdx <= 0 {
+			hf.Name, err = d.decodeString(undecodedName)
+			if err != nil {
+				return err
+			}
+		}
+		hf.Value, err = d.decodeString(undecodedValue)
+		if err != nil {
+			return err
+		}
+	}
 	d.buf = buf
 	if it.indexed() {
 		d.dynTab.add(hf)
@@ -459,46 +472,52 @@ func readVarInt(n byte, p []byte) (i uint64, remain []byte, err error) {
 	return 0, origP, errNeedMore
 }
 
-// readString decodes an hpack string from p.
+// readString reads an hpack string from p.
 //
-// wantStr is whether s will be used. If false, decompression and
-// []byte->string garbage are skipped if s will be ignored
-// anyway. This does mean that huffman decoding errors for non-indexed
-// strings past the MAX_HEADER_LIST_SIZE are ignored, but the server
-// is returning an error anyway, and because they're not indexed, the error
-// won't affect the decoding state.
-func (d *Decoder) readString(p []byte, wantStr bool) (s string, remain []byte, err error) {
+// It returns a reference to the encoded string data to permit deferring decode costs
+// until after the caller verifies all data is present.
+func (d *Decoder) readString(p []byte) (u undecodedString, remain []byte, err error) {
 	if len(p) == 0 {
-		return "", p, errNeedMore
+		return u, p, errNeedMore
 	}
 	isHuff := p[0]&128 != 0
 	strLen, p, err := readVarInt(7, p)
 	if err != nil {
-		return "", p, err
+		return u, p, err
 	}
 	if d.maxStrLen != 0 && strLen > uint64(d.maxStrLen) {
-		return "", nil, ErrStringLength
+		// Returning an error here means Huffman decoding errors
+		// for non-indexed strings past the maximum string length
+		// are ignored, but the server is returning an error anyway
+		// and because the string is not indexed the error will not
+		// affect the decoding state.
+		return u, nil, ErrStringLength
 	}
 	if uint64(len(p)) < strLen {
-		return "", p, errNeedMore
+		return u, p, errNeedMore
 	}
-	if !isHuff {
-		if wantStr {
-			s = string(p[:strLen])
-		}
-		return s, p[strLen:], nil
-	}
-
-	if wantStr {
-		buf := bufPool.Get().(*bytes.Buffer)
-		buf.Reset() // don't trust others
-		defer bufPool.Put(buf)
-		if err := huffmanDecode(buf, d.maxStrLen, p[:strLen]); err != nil {
-			buf.Reset()
-			return "", nil, err
-		}
-		s = buf.String()
-		buf.Reset() // be nice to GC
-	}
-	return s, p[strLen:], nil
+	u.isHuff = isHuff
+	u.b = p[:strLen]
+	return u, p[strLen:], nil
+}
+
+type undecodedString struct {
+	isHuff bool
+	b      []byte
+}
+
+func (d *Decoder) decodeString(u undecodedString) (string, error) {
+	if !u.isHuff {
+		return string(u.b), nil
+	}
+	buf := bufPool.Get().(*bytes.Buffer)
+	buf.Reset() // don't trust others
+	var s string
+	err := huffmanDecode(buf, d.maxStrLen, u.b)
+	if err == nil {
+		s = buf.String()
+	}
+	buf.Reset() // be nice to GC
+	bufPool.Put(buf)
+	return s, err
 }

vendor/golang.org/x/net/http2/server.go

@@ -843,8 +843,13 @@ type frameWriteResult struct {
 // and then reports when it's done.
 // At most one goroutine can be running writeFrameAsync at a time per
 // serverConn.
-func (sc *serverConn) writeFrameAsync(wr FrameWriteRequest) {
-	err := wr.write.writeFrame(sc)
+func (sc *serverConn) writeFrameAsync(wr FrameWriteRequest, wd *writeData) {
+	var err error
+	if wd == nil {
+		err = wr.write.writeFrame(sc)
+	} else {
+		err = sc.framer.endWrite()
+	}
 	sc.wroteFrameCh <- frameWriteResult{wr: wr, err: err}
 }
 
@@ -1251,9 +1256,16 @@ func (sc *serverConn) startFrameWrite(wr FrameWriteRequest) {
 		sc.writingFrameAsync = false
 		err := wr.write.writeFrame(sc)
 		sc.wroteFrame(frameWriteResult{wr: wr, err: err})
+	} else if wd, ok := wr.write.(*writeData); ok {
+		// Encode the frame in the serve goroutine, to ensure we don't have
+		// any lingering asynchronous references to data passed to Write.
+		// See https://go.dev/issue/58446.
+		sc.framer.startWriteDataPadded(wd.streamID, wd.endStream, wd.p, nil)
+		sc.writingFrameAsync = true
+		go sc.writeFrameAsync(wr, wd)
 	} else {
 		sc.writingFrameAsync = true
-		go sc.writeFrameAsync(wr)
+		go sc.writeFrameAsync(wr, nil)
 	}
 }
 

vendor/modules.txt

@@ -559,7 +559,7 @@ golang.org/x/crypto/pbkdf2
 golang.org/x/crypto/scrypt
 golang.org/x/crypto/ssh
 golang.org/x/crypto/ssh/internal/bcrypt_pbkdf
-# golang.org/x/net v0.6.0
+# golang.org/x/net v0.7.0
 ## explicit; go 1.17
 golang.org/x/net/context
 golang.org/x/net/context/ctxhttp