diff options
Diffstat (limited to 'meta/recipes-devtools/go/go-1.14/CVE-2023-24536_1.patch')
| -rw-r--r-- | meta/recipes-devtools/go/go-1.14/CVE-2023-24536_1.patch | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/meta/recipes-devtools/go/go-1.14/CVE-2023-24536_1.patch b/meta/recipes-devtools/go/go-1.14/CVE-2023-24536_1.patch new file mode 100644 index 0000000000..39e1304fbd --- /dev/null +++ b/meta/recipes-devtools/go/go-1.14/CVE-2023-24536_1.patch @@ -0,0 +1,134 @@ +From ef41a4e2face45e580c5836eaebd51629fc23f15 Mon Sep 17 00:00:00 2001 +From: Damien Neil <dneil@google.com> +Date: Thu, 16 Mar 2023 14:18:04 -0700 +Subject: [PATCH] [release-branch.go1.19] mime/multipart: avoid excessive copy + buffer allocations in ReadForm + +When copying form data to disk with io.Copy, +allocate only one copy buffer and reuse it rather than +creating two buffers per file (one from io.multiReader.WriteTo, +and a second one from os.File.ReadFrom). + +Thanks to Jakob Ackermann (@das7pad) for reporting this issue. + +For CVE-2023-24536 +For #59153 +For #59269 + +Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1802453 +Run-TryBot: Damien Neil <dneil@google.com> +Reviewed-by: Julie Qiu <julieqiu@google.com> +Reviewed-by: Roland Shoemaker <bracewell@google.com> +Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1802395 +Run-TryBot: Roland Shoemaker <bracewell@google.com> +Reviewed-by: Damien Neil <dneil@google.com> +Change-Id: Ie405470c92abffed3356913b37d813e982c96c8b +Reviewed-on: https://go-review.googlesource.com/c/go/+/481983 +Run-TryBot: Michael Knyszek <mknyszek@google.com> +TryBot-Result: Gopher Robot <gobot@golang.org> +Auto-Submit: Michael Knyszek <mknyszek@google.com> +Reviewed-by: Matthew Dempsky <mdempsky@google.com> + +Upstream-Status: Backport [https://github.com/golang/go/commit/ef41a4e2face45e580c5836eaebd51629fc23f15] +CVE: CVE-2023-24536 +Signed-off-by: Vijay Anusuri <vanusuri@mvista.com> +--- + src/mime/multipart/formdata.go | 15 +++++++-- + src/mime/multipart/formdata_test.go | 49 +++++++++++++++++++++++++++++ + 2 files changed, 61 insertions(+), 3 deletions(-) + +diff --git a/src/mime/multipart/formdata.go b/src/mime/multipart/formdata.go +index a7d4ca97f0484..975dcb6b26db4 100644 +--- a/src/mime/multipart/formdata.go ++++ b/src/mime/multipart/formdata.go +@@ -84,6 +84,7 @@ func (r *Reader) readForm(maxMemory int64) (_ *Form, err error) { + maxMemoryBytes = math.MaxInt64 + } + } ++ var copyBuf []byte + for { + p, err := r.nextPart(false, maxMemoryBytes) + if err == io.EOF { +@@ -147,14 +148,22 @@ func (r *Reader) readForm(maxMemory int64) (_ *Form, err error) { + } + } + numDiskFiles++ +- size, err := io.Copy(file, io.MultiReader(&b, p)) ++ if _, err := file.Write(b.Bytes()); err != nil { ++ return nil, err ++ } ++ if copyBuf == nil { ++ copyBuf = make([]byte, 32*1024) // same buffer size as io.Copy uses ++ } ++ // os.File.ReadFrom will allocate its own copy buffer if we let io.Copy use it. ++ type writerOnly struct{ io.Writer } ++ remainingSize, err := io.CopyBuffer(writerOnly{file}, p, copyBuf) + if err != nil { + return nil, err + } + fh.tmpfile = file.Name() +- fh.Size = size ++ fh.Size = int64(b.Len()) + remainingSize + fh.tmpoff = fileOff +- fileOff += size ++ fileOff += fh.Size + if !combineFiles { + if err := file.Close(); err != nil { + return nil, err +diff --git a/src/mime/multipart/formdata_test.go b/src/mime/multipart/formdata_test.go +index 5cded7170c6b8..f5b56083b2377 100644 +--- a/src/mime/multipart/formdata_test.go ++++ b/src/mime/multipart/formdata_test.go +@@ -368,3 +368,52 @@ func testReadFormManyFiles(t *testing.T, distinct bool) { + t.Fatalf("temp dir contains %v files; want 0", len(names)) + } + } ++ ++func BenchmarkReadForm(b *testing.B) { ++ for _, test := range []struct { ++ name string ++ form func(fw *Writer, count int) ++ }{{ ++ name: "fields", ++ form: func(fw *Writer, count int) { ++ for i := 0; i < count; i++ { ++ w, _ := fw.CreateFormField(fmt.Sprintf("field%v", i)) ++ fmt.Fprintf(w, "value %v", i) ++ } ++ }, ++ }, { ++ name: "files", ++ form: func(fw *Writer, count int) { ++ for i := 0; i < count; i++ { ++ w, _ := fw.CreateFormFile(fmt.Sprintf("field%v", i), fmt.Sprintf("file%v", i)) ++ fmt.Fprintf(w, "value %v", i) ++ } ++ }, ++ }} { ++ b.Run(test.name, func(b *testing.B) { ++ for _, maxMemory := range []int64{ ++ 0, ++ 1 << 20, ++ } { ++ var buf bytes.Buffer ++ fw := NewWriter(&buf) ++ test.form(fw, 10) ++ if err := fw.Close(); err != nil { ++ b.Fatal(err) ++ } ++ b.Run(fmt.Sprintf("maxMemory=%v", maxMemory), func(b *testing.B) { ++ b.ReportAllocs() ++ for i := 0; i < b.N; i++ { ++ fr := NewReader(bytes.NewReader(buf.Bytes()), fw.Boundary()) ++ form, err := fr.ReadForm(maxMemory) ++ if err != nil { ++ b.Fatal(err) ++ } ++ form.RemoveAll() ++ } ++ ++ }) ++ } ++ }) ++ } ++} |