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authorChee Yang Lee <chee.yang.lee@intel.com>2022-09-14 23:14:49 +0800
committerSteve Sakoman <steve@sakoman.com>2022-09-14 08:08:22 -1000
commitddb09ccc3caebbd3cf643bb3bb3c198845050c69 (patch)
tree639a263b0605d2d1fca7233f9eb188b31149ba0d
parentc852d3e6742fe82b9f4ec84b077d6e1b0bfd021e (diff)
downloadopenembedded-core-contrib-ddb09ccc3caebbd3cf643bb3bb3c198845050c69.tar.gz
go: fix and ignore several CVEs
backport fixes: CVE-2021-27918 CVE-2021-36221 CVE-2021-39293 CVE-2021-41771 ignore: CVE-2022-29526 CVE-2022-30634 Signed-off-by: Chee Yang Lee <chee.yang.lee@intel.com> Signed-off-by: Steve Sakoman <steve@sakoman.com>
-rw-r--r--meta/recipes-devtools/go/go-1.14.inc10
-rw-r--r--meta/recipes-devtools/go/go-1.14/CVE-2021-27918.patch191
-rw-r--r--meta/recipes-devtools/go/go-1.14/CVE-2021-36221.patch101
-rw-r--r--meta/recipes-devtools/go/go-1.14/CVE-2021-39293.patch79
-rw-r--r--meta/recipes-devtools/go/go-1.14/CVE-2021-41771.patch86
5 files changed, 467 insertions, 0 deletions
diff --git a/meta/recipes-devtools/go/go-1.14.inc b/meta/recipes-devtools/go/go-1.14.inc
index 1458a11b3f..af6345205e 100644
--- a/meta/recipes-devtools/go/go-1.14.inc
+++ b/meta/recipes-devtools/go/go-1.14.inc
@@ -32,6 +32,10 @@ SRC_URI += "\
file://CVE-2022-30635.patch \
file://CVE-2022-32148.patch \
file://CVE-2022-32189.patch \
+ file://CVE-2021-27918.patch \
+ file://CVE-2021-36221.patch \
+ file://CVE-2021-39293.patch \
+ file://CVE-2021-41771.patch \
"
SRC_URI_append_libc-musl = " file://0009-ld-replace-glibc-dynamic-linker-with-musl.patch"
@@ -42,3 +46,9 @@ SRC_URI[main.sha256sum] = "7ed13b2209e54a451835997f78035530b331c5b6943cdcd68a3d8
# https://github.com/golang/go/issues/30999#issuecomment-910470358
CVE_CHECK_WHITELIST += "CVE-2021-29923"
+# this issue affected go1.15 onwards
+# https://security-tracker.debian.org/tracker/CVE-2022-29526
+CVE_CHECK_WHITELIST += "CVE-2022-29526"
+
+# Issue only on windows
+CVE_CHECK_WHITELIST += "CVE-2022-30634"
diff --git a/meta/recipes-devtools/go/go-1.14/CVE-2021-27918.patch b/meta/recipes-devtools/go/go-1.14/CVE-2021-27918.patch
new file mode 100644
index 0000000000..faa3f7f641
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.14/CVE-2021-27918.patch
@@ -0,0 +1,191 @@
+From d0b79e3513a29628f3599dc8860666b6eed75372 Mon Sep 17 00:00:00 2001
+From: Katie Hockman <katie@golang.org>
+Date: Mon, 1 Mar 2021 09:54:00 -0500
+Subject: [PATCH] encoding/xml: prevent infinite loop while decoding
+
+This change properly handles a TokenReader which
+returns an EOF in the middle of an open XML
+element.
+
+Thanks to Sam Whited for reporting this.
+
+Fixes CVE-2021-27918
+Fixes #44913
+
+Change-Id: Id02a3f3def4a1b415fa2d9a8e3b373eb6cb0f433
+Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1004594
+Reviewed-by: Russ Cox <rsc@google.com>
+Reviewed-by: Roland Shoemaker <bracewell@google.com>
+Reviewed-by: Filippo Valsorda <valsorda@google.com>
+Reviewed-on: https://go-review.googlesource.com/c/go/+/300391
+Trust: Katie Hockman <katie@golang.org>
+Run-TryBot: Katie Hockman <katie@golang.org>
+TryBot-Result: Go Bot <gobot@golang.org>
+Reviewed-by: Alexander Rakoczy <alex@golang.org>
+Reviewed-by: Filippo Valsorda <filippo@golang.org>
+
+https://github.com/golang/go/commit/d0b79e3513a29628f3599dc8860666b6eed75372
+CVE: CVE-2021-27918
+Upstream-Status: Backport
+Signed-off-by: Chee Yang Lee <chee.yang.lee@intel.com>
+---
+ src/encoding/xml/xml.go | 19 ++++---
+ src/encoding/xml/xml_test.go | 104 +++++++++++++++++++++++++++--------
+ 2 files changed, 92 insertions(+), 31 deletions(-)
+
+diff --git a/src/encoding/xml/xml.go b/src/encoding/xml/xml.go
+index adaf4daf198b9..6f9594d7ba7a3 100644
+--- a/src/encoding/xml/xml.go
++++ b/src/encoding/xml/xml.go
+@@ -271,7 +271,7 @@ func NewTokenDecoder(t TokenReader) *Decoder {
+ // it will return an error.
+ //
+ // Token implements XML name spaces as described by
+-// https://www.w3.org/TR/REC-xml-names/. Each of the
++// https://www.w3.org/TR/REC-xml-names/. Each of the
+ // Name structures contained in the Token has the Space
+ // set to the URL identifying its name space when known.
+ // If Token encounters an unrecognized name space prefix,
+@@ -285,16 +285,17 @@ func (d *Decoder) Token() (Token, error) {
+ if d.nextToken != nil {
+ t = d.nextToken
+ d.nextToken = nil
+- } else if t, err = d.rawToken(); err != nil {
+- switch {
+- case err == io.EOF && d.t != nil:
+- err = nil
+- case err == io.EOF && d.stk != nil && d.stk.kind != stkEOF:
+- err = d.syntaxError("unexpected EOF")
++ } else {
++ if t, err = d.rawToken(); t == nil && err != nil {
++ if err == io.EOF && d.stk != nil && d.stk.kind != stkEOF {
++ err = d.syntaxError("unexpected EOF")
++ }
++ return nil, err
+ }
+- return t, err
++ // We still have a token to process, so clear any
++ // errors (e.g. EOF) and proceed.
++ err = nil
+ }
+-
+ if !d.Strict {
+ if t1, ok := d.autoClose(t); ok {
+ d.nextToken = t
+diff --git a/src/encoding/xml/xml_test.go b/src/encoding/xml/xml_test.go
+index efddca43e9102..5672ebb375f0d 100644
+--- a/src/encoding/xml/xml_test.go
++++ b/src/encoding/xml/xml_test.go
+@@ -33,30 +33,90 @@ func (t *toks) Token() (Token, error) {
+
+ func TestDecodeEOF(t *testing.T) {
+ start := StartElement{Name: Name{Local: "test"}}
+- t.Run("EarlyEOF", func(t *testing.T) {
+- d := NewTokenDecoder(&toks{earlyEOF: true, t: []Token{
+- start,
+- start.End(),
+- }})
+- err := d.Decode(&struct {
+- XMLName Name `xml:"test"`
+- }{})
+- if err != nil {
+- t.Error(err)
++ tests := []struct {
++ name string
++ tokens []Token
++ ok bool
++ }{
++ {
++ name: "OK",
++ tokens: []Token{
++ start,
++ start.End(),
++ },
++ ok: true,
++ },
++ {
++ name: "Malformed",
++ tokens: []Token{
++ start,
++ StartElement{Name: Name{Local: "bad"}},
++ start.End(),
++ },
++ ok: false,
++ },
++ }
++ for _, tc := range tests {
++ for _, eof := range []bool{true, false} {
++ name := fmt.Sprintf("%s/earlyEOF=%v", tc.name, eof)
++ t.Run(name, func(t *testing.T) {
++ d := NewTokenDecoder(&toks{
++ earlyEOF: eof,
++ t: tc.tokens,
++ })
++ err := d.Decode(&struct {
++ XMLName Name `xml:"test"`
++ }{})
++ if tc.ok && err != nil {
++ t.Fatalf("d.Decode: expected nil error, got %v", err)
++ }
++ if _, ok := err.(*SyntaxError); !tc.ok && !ok {
++ t.Errorf("d.Decode: expected syntax error, got %v", err)
++ }
++ })
+ }
+- })
+- t.Run("LateEOF", func(t *testing.T) {
+- d := NewTokenDecoder(&toks{t: []Token{
+- start,
+- start.End(),
+- }})
+- err := d.Decode(&struct {
+- XMLName Name `xml:"test"`
+- }{})
+- if err != nil {
+- t.Error(err)
++ }
++}
++
++type toksNil struct {
++ returnEOF bool
++ t []Token
++}
++
++func (t *toksNil) Token() (Token, error) {
++ if len(t.t) == 0 {
++ if !t.returnEOF {
++ // Return nil, nil before returning an EOF. It's legal, but
++ // discouraged.
++ t.returnEOF = true
++ return nil, nil
+ }
+- })
++ return nil, io.EOF
++ }
++ var tok Token
++ tok, t.t = t.t[0], t.t[1:]
++ return tok, nil
++}
++
++func TestDecodeNilToken(t *testing.T) {
++ for _, strict := range []bool{true, false} {
++ name := fmt.Sprintf("Strict=%v", strict)
++ t.Run(name, func(t *testing.T) {
++ start := StartElement{Name: Name{Local: "test"}}
++ bad := StartElement{Name: Name{Local: "bad"}}
++ d := NewTokenDecoder(&toksNil{
++ // Malformed
++ t: []Token{start, bad, start.End()},
++ })
++ d.Strict = strict
++ err := d.Decode(&struct {
++ XMLName Name `xml:"test"`
++ }{})
++ if _, ok := err.(*SyntaxError); !ok {
++ t.Errorf("d.Decode: expected syntax error, got %v", err)
++ }
++ })
++ }
+ }
+
+ const testInput = `
diff --git a/meta/recipes-devtools/go/go-1.14/CVE-2021-36221.patch b/meta/recipes-devtools/go/go-1.14/CVE-2021-36221.patch
new file mode 100644
index 0000000000..9c00d4ebb2
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.14/CVE-2021-36221.patch
@@ -0,0 +1,101 @@
+From b7a85e0003cedb1b48a1fd3ae5b746ec6330102e Mon Sep 17 00:00:00 2001
+From: Damien Neil <dneil@google.com>
+Date: Wed, 7 Jul 2021 16:34:34 -0700
+Subject: [PATCH] net/http/httputil: close incoming ReverseProxy request body
+
+Reading from an incoming request body after the request handler aborts
+with a panic can cause a panic, becuse http.Server does not (contrary
+to its documentation) close the request body in this case.
+
+Always close the incoming request body in ReverseProxy.ServeHTTP to
+ensure that any in-flight outgoing requests using the body do not
+read from it.
+
+Updates #46866
+Fixes CVE-2021-36221
+
+Change-Id: I310df269200ad8732c5d9f1a2b00de68725831df
+Reviewed-on: https://go-review.googlesource.com/c/go/+/333191
+Trust: Damien Neil <dneil@google.com>
+Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
+Reviewed-by: Filippo Valsorda <filippo@golang.org>
+
+https://github.com/golang/go/commit/b7a85e0003cedb1b48a1fd3ae5b746ec6330102e
+CVE: CVE-2021-36221
+Upstream-Status: Backport
+Signed-off-by: Chee Yang Lee <chee.yang.lee@intel.com>
+---
+ src/net/http/httputil/reverseproxy.go | 9 +++++
+ src/net/http/httputil/reverseproxy_test.go | 39 ++++++++++++++++++++++
+ 2 files changed, 48 insertions(+)
+
+diff --git a/src/net/http/httputil/reverseproxy.go b/src/net/http/httputil/reverseproxy.go
+index 5d39955d62d15..8b63368386f43 100644
+--- a/src/net/http/httputil/reverseproxy.go
++++ b/src/net/http/httputil/reverseproxy.go
+@@ -235,6 +235,15 @@ func (p *ReverseProxy) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
+ if req.ContentLength == 0 {
+ outreq.Body = nil // Issue 16036: nil Body for http.Transport retries
+ }
++ if outreq.Body != nil {
++ // Reading from the request body after returning from a handler is not
++ // allowed, and the RoundTrip goroutine that reads the Body can outlive
++ // this handler. This can lead to a crash if the handler panics (see
++ // Issue 46866). Although calling Close doesn't guarantee there isn't
++ // any Read in flight after the handle returns, in practice it's safe to
++ // read after closing it.
++ defer outreq.Body.Close()
++ }
+ if outreq.Header == nil {
+ outreq.Header = make(http.Header) // Issue 33142: historical behavior was to always allocate
+ }
+diff --git a/src/net/http/httputil/reverseproxy_test.go b/src/net/http/httputil/reverseproxy_test.go
+index 1898ed8b8afde..4b6ad77a29466 100644
+--- a/src/net/http/httputil/reverseproxy_test.go
++++ b/src/net/http/httputil/reverseproxy_test.go
+@@ -1122,6 +1122,45 @@ func TestReverseProxy_PanicBodyError(t *testing.T) {
+ rproxy.ServeHTTP(httptest.NewRecorder(), req)
+ }
+
++// Issue #46866: panic without closing incoming request body causes a panic
++func TestReverseProxy_PanicClosesIncomingBody(t *testing.T) {
++ backend := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
++ out := "this call was relayed by the reverse proxy"
++ // Coerce a wrong content length to induce io.ErrUnexpectedEOF
++ w.Header().Set("Content-Length", fmt.Sprintf("%d", len(out)*2))
++ fmt.Fprintln(w, out)
++ }))
++ defer backend.Close()
++ backendURL, err := url.Parse(backend.URL)
++ if err != nil {
++ t.Fatal(err)
++ }
++ proxyHandler := NewSingleHostReverseProxy(backendURL)
++ proxyHandler.ErrorLog = log.New(io.Discard, "", 0) // quiet for tests
++ frontend := httptest.NewServer(proxyHandler)
++ defer frontend.Close()
++ frontendClient := frontend.Client()
++
++ var wg sync.WaitGroup
++ for i := 0; i < 2; i++ {
++ wg.Add(1)
++ go func() {
++ defer wg.Done()
++ for j := 0; j < 10; j++ {
++ const reqLen = 6 * 1024 * 1024
++ req, _ := http.NewRequest("POST", frontend.URL, &io.LimitedReader{R: neverEnding('x'), N: reqLen})
++ req.ContentLength = reqLen
++ resp, _ := frontendClient.Transport.RoundTrip(req)
++ if resp != nil {
++ io.Copy(io.Discard, resp.Body)
++ resp.Body.Close()
++ }
++ }
++ }()
++ }
++ wg.Wait()
++}
++
+ func TestSelectFlushInterval(t *testing.T) {
+ tests := []struct {
+ name string
diff --git a/meta/recipes-devtools/go/go-1.14/CVE-2021-39293.patch b/meta/recipes-devtools/go/go-1.14/CVE-2021-39293.patch
new file mode 100644
index 0000000000..88fca9cad9
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.14/CVE-2021-39293.patch
@@ -0,0 +1,79 @@
+From 6c480017ae600b2c90a264a922e041df04dfa785 Mon Sep 17 00:00:00 2001
+From: Roland Shoemaker <roland@golang.org>
+Date: Wed, 18 Aug 2021 11:49:29 -0700
+Subject: [PATCH] [release-branch.go1.16] archive/zip: prevent preallocation
+ check from overflowing
+
+If the indicated directory size in the archive header is so large that
+subtracting it from the archive size overflows a uint64, the check that
+the indicated number of files in the archive can be effectively
+bypassed. Prevent this from happening by checking that the indicated
+directory size is less than the size of the archive.
+
+Thanks to the OSS-Fuzz project for discovering this issue and to
+Emmanuel Odeke for reporting it.
+
+Fixes #47985
+Updates #47801
+Fixes CVE-2021-39293
+
+Change-Id: Ifade26b98a40f3b37398ca86bd5252d12394dd24
+Reviewed-on: https://go-review.googlesource.com/c/go/+/343434
+Trust: Roland Shoemaker <roland@golang.org>
+Run-TryBot: Roland Shoemaker <roland@golang.org>
+TryBot-Result: Go Bot <gobot@golang.org>
+Reviewed-by: Russ Cox <rsc@golang.org>
+(cherry picked from commit bacbc33439b124ffd7392c91a5f5d96eca8c0c0b)
+Reviewed-on: https://go-review.googlesource.com/c/go/+/345409
+Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
+Run-TryBot: Emmanuel Odeke <emmanuel@orijtech.com>
+Trust: Cherry Mui <cherryyz@google.com>
+
+https://github.com/golang/go/commit/6c480017ae600b2c90a264a922e041df04dfa785
+CVE: CVE-2021-39293
+Upstream-Status: Backport
+Signed-off-by: Chee Yang Lee <chee.yang.lee@intel.com>
+---
+ src/archive/zip/reader.go | 2 +-
+ src/archive/zip/reader_test.go | 18 ++++++++++++++++++
+ 2 files changed, 19 insertions(+), 1 deletion(-)
+
+diff --git a/src/archive/zip/reader.go b/src/archive/zip/reader.go
+index ddef2b7b5a517..801d1313b6c32 100644
+--- a/src/archive/zip/reader.go
++++ b/src/archive/zip/reader.go
+@@ -105,7 +105,7 @@ func (z *Reader) init(r io.ReaderAt, size int64) error {
+ // indicate it contains up to 1 << 128 - 1 files. Since each file has a
+ // header which will be _at least_ 30 bytes we can safely preallocate
+ // if (data size / 30) >= end.directoryRecords.
+- if (uint64(size)-end.directorySize)/30 >= end.directoryRecords {
++ if end.directorySize < uint64(size) && (uint64(size)-end.directorySize)/30 >= end.directoryRecords {
+ z.File = make([]*File, 0, end.directoryRecords)
+ }
+ z.Comment = end.comment
+diff --git a/src/archive/zip/reader_test.go b/src/archive/zip/reader_test.go
+index 471be27bb1004..99f13345d8d06 100644
+--- a/src/archive/zip/reader_test.go
++++ b/src/archive/zip/reader_test.go
+@@ -1225,3 +1225,21 @@ func TestCVE202133196(t *testing.T) {
+ t.Errorf("Archive has unexpected number of files, got %d, want 5", len(r.File))
+ }
+ }
++
++func TestCVE202139293(t *testing.T) {
++ // directory size is so large, that the check in Reader.init
++ // overflows when subtracting from the archive size, causing
++ // the pre-allocation check to be bypassed.
++ data := []byte{
++ 0x50, 0x4b, 0x06, 0x06, 0x05, 0x06, 0x31, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x4b,
++ 0x06, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
++ 0x00, 0x00, 0x50, 0x4b, 0x05, 0x06, 0x00, 0x1a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x4b,
++ 0x06, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
++ 0x00, 0x00, 0x00, 0x50, 0x4b, 0x05, 0x06, 0x00, 0x31, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
++ 0xff, 0x50, 0xfe, 0x00, 0xff, 0x00, 0x3a, 0x00, 0x00, 0x00, 0xff,
++ }
++ _, err := NewReader(bytes.NewReader(data), int64(len(data)))
++ if err != ErrFormat {
++ t.Fatalf("unexpected error, got: %v, want: %v", err, ErrFormat)
++ }
++}
diff --git a/meta/recipes-devtools/go/go-1.14/CVE-2021-41771.patch b/meta/recipes-devtools/go/go-1.14/CVE-2021-41771.patch
new file mode 100644
index 0000000000..526796dbcb
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.14/CVE-2021-41771.patch
@@ -0,0 +1,86 @@
+From d19c5bdb24e093a2d5097b7623284eb02726cede Mon Sep 17 00:00:00 2001
+From: Roland Shoemaker <roland@golang.org>
+Date: Thu, 14 Oct 2021 13:02:01 -0700
+Subject: [PATCH] [release-branch.go1.16] debug/macho: fail on invalid dynamic
+ symbol table command
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Fail out when loading a file that contains a dynamic symbol table
+command that indicates a larger number of symbols than exist in the
+loaded symbol table.
+
+Thanks to Burak Çarıkçı - Yunus Yıldırım (CT-Zer0 Crypttech) for
+reporting this issue.
+
+Updates #48990
+Fixes #48991
+Fixes CVE-2021-41771
+
+Change-Id: Ic3d6e6529241afcc959544b326b21b663262bad5
+Reviewed-on: https://go-review.googlesource.com/c/go/+/355990
+Reviewed-by: Julie Qiu <julie@golang.org>
+Reviewed-by: Katie Hockman <katie@golang.org>
+Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
+Run-TryBot: Roland Shoemaker <roland@golang.org>
+TryBot-Result: Go Bot <gobot@golang.org>
+Trust: Katie Hockman <katie@golang.org>
+(cherry picked from commit 61536ec03063b4951163bd09609c86d82631fa27)
+Reviewed-on: https://go-review.googlesource.com/c/go/+/359454
+Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
+
+https://github.com/golang/go/commit/d19c5bdb24e093a2d5097b7623284eb02726cede
+CVE: CVE-2021-41771
+Upstream-Status: Backport
+Signed-off-by: Chee Yang Lee <chee.yang.lee@intel.com>
+---
+ src/debug/macho/file.go | 9 +++++++++
+ src/debug/macho/file_test.go | 7 +++++++
+ .../testdata/gcc-amd64-darwin-exec-with-bad-dysym.base64 | 1 +
+ 3 files changed, 17 insertions(+)
+ create mode 100644 src/debug/macho/testdata/gcc-amd64-darwin-exec-with-bad-dysym.base64
+
+diff --git a/src/debug/macho/file.go b/src/debug/macho/file.go
+index 085b0c8219bad..73cfce3c7606e 100644
+--- a/src/debug/macho/file.go
++++ b/src/debug/macho/file.go
+@@ -345,6 +345,15 @@ func NewFile(r io.ReaderAt) (*File, error) {
+ if err := binary.Read(b, bo, &hdr); err != nil {
+ return nil, err
+ }
++ if hdr.Iundefsym > uint32(len(f.Symtab.Syms)) {
++ return nil, &FormatError{offset, fmt.Sprintf(
++ "undefined symbols index in dynamic symbol table command is greater than symbol table length (%d > %d)",
++ hdr.Iundefsym, len(f.Symtab.Syms)), nil}
++ } else if hdr.Iundefsym+hdr.Nundefsym > uint32(len(f.Symtab.Syms)) {
++ return nil, &FormatError{offset, fmt.Sprintf(
++ "number of undefined symbols after index in dynamic symbol table command is greater than symbol table length (%d > %d)",
++ hdr.Iundefsym+hdr.Nundefsym, len(f.Symtab.Syms)), nil}
++ }
+ dat := make([]byte, hdr.Nindirectsyms*4)
+ if _, err := r.ReadAt(dat, int64(hdr.Indirectsymoff)); err != nil {
+ return nil, err
+diff --git a/src/debug/macho/file_test.go b/src/debug/macho/file_test.go
+index 03915c86e23d9..9beeb80dd27c1 100644
+--- a/src/debug/macho/file_test.go
++++ b/src/debug/macho/file_test.go
+@@ -416,3 +416,10 @@ func TestTypeString(t *testing.T) {
+ t.Errorf("got %v, want %v", TypeExec.GoString(), "macho.Exec")
+ }
+ }
++
++func TestOpenBadDysymCmd(t *testing.T) {
++ _, err := openObscured("testdata/gcc-amd64-darwin-exec-with-bad-dysym.base64")
++ if err == nil {
++ t.Fatal("openObscured did not fail when opening a file with an invalid dynamic symbol table command")
++ }
++}
+diff --git a/src/debug/macho/testdata/gcc-amd64-darwin-exec-with-bad-dysym.base64 b/src/debug/macho/testdata/gcc-amd64-darwin-exec-with-bad-dysym.base64
+new file mode 100644
+index 0000000000000..8e0436639c109
+--- /dev/null
++++ b/src/debug/macho/testdata/gcc-amd64-darwin-exec-with-bad-dysym.base64
+@@ -0,0 +1 @@
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+\ No newline at end of file