From 15ffef9628c700156c3149d02fd27ea3409a4eb7 Mon Sep 17 00:00:00 2001 From: Damien Neil Date: Wed, 30 Nov 2022 16:37:07 -0500 Subject: [PATCH] [release-branch.go1.18] net/http: update bundled golang.org/x/net/http2 Disable cmd/internal/moddeps test, since this update includes PRIVATE track fixes. For #56350 For #57008 Fixes CVE-2022-41717 Change-Id: I31ebd2b9ae190ef6f7646187103ea1c8a713ff2e Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1663833 Reviewed-by: Tatiana Bradley Reviewed-by: Julie Qiu Reviewed-on: https://go-review.googlesource.com/c/go/+/455361 Run-TryBot: Jenny Rakoczy Reviewed-by: Michael Pratt TryBot-Result: Gopher Robot Reference:https://go-review.googlesource.com/c/go/+/455361 Conflict: NA --- src/net/http/h2_bundle.go | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/src/net/http/h2_bundle.go b/src/net/http/h2_bundle.go index d7e2f764c8..5433ebdc51 100644 --- a/src/net/http/h2_bundle.go +++ b/src/net/http/h2_bundle.go @@ -4189,6 +4189,7 @@ type http2serverConn struct { headerTableSize uint32 peerMaxHeaderListSize uint32 // zero means unknown (default) canonHeader map[string]string // http2-lower-case -> Go-Canonical-Case + canonHeaderKeysSize int // canonHeader keys size in bytes writingFrame bool // started writing a frame (on serve goroutine or separate) writingFrameAsync bool // started a frame on its own goroutine but haven't heard back on wroteFrameCh needsFrameFlush bool // last frame write wasn't a flush @@ -4368,6 +4369,13 @@ func (sc *http2serverConn) condlogf(err error, format string, args ...interface{ } } +// maxCachedCanonicalHeadersKeysSize is an arbitrarily-chosen limit on the size +// of the entries in the canonHeader cache. +// This should be larger than the size of unique, uncommon header keys likely to +// be sent by the peer, while not so high as to permit unreasonable memory usage +// if the peer sends an unbounded number of unique header keys. +const http2maxCachedCanonicalHeadersKeysSize = 2048 + func (sc *http2serverConn) canonicalHeader(v string) string { sc.serveG.check() http2buildCommonHeaderMapsOnce() @@ -4383,14 +4391,10 @@ func (sc *http2serverConn) canonicalHeader(v string) string { sc.canonHeader = make(map[string]string) } cv = CanonicalHeaderKey(v) - // maxCachedCanonicalHeaders is an arbitrarily-chosen limit on the number of - // entries in the canonHeader cache. This should be larger than the number - // of unique, uncommon header keys likely to be sent by the peer, while not - // so high as to permit unreaasonable memory usage if the peer sends an unbounded - // number of unique header keys. - const maxCachedCanonicalHeaders = 32 - if len(sc.canonHeader) < maxCachedCanonicalHeaders { + size := 100 + len(v)*2 // 100 bytes of map overhead + key + value + if sc.canonHeaderKeysSize+size <= http2maxCachedCanonicalHeadersKeysSize { sc.canonHeader[v] = cv + sc.canonHeaderKeysSize += size } return cv } -- 2.33.0