go: fix CVE-2023-24537 Infinite loop in parsing

Setting a large line or column number using a //line directive can cause
integer overflow even in small source files.

Limit line and column numbers in //line directives to 2^30-1, which
is small enough to avoid int32 overflow on all reasonbly-sized files.

Fixes CVE-2023-24537
Fixes #59273
For #59180

(From OE-Core rev: 15c07dff384ce4fb0e90f4f32c182a82101a1c82)

Signed-off-by: Vivek Kumbhar <vkumbhar@mvista.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

2 files changed, 76 insertions, 0 deletions

diff --git a/meta/recipes-devtools/go/go-1.17.13.inc b/meta/recipes-devtools/go/go-1.17.13.inc
index 34d58aec2f..cda9227042 100644
--- a/meta/recipes-devtools/go/go-1.17.13.inc
+++ b/meta/recipes-devtools/go/go-1.17.13.inc
@@ -27,6 +27,7 @@ SRC_URI += "\
     file://add_godebug.patch \
     file://cve-2022-41725.patch \
     file://CVE-2022-41722.patch \
+    file://CVE-2023-24537.patch \
 "
 SRC_URI[main.sha256sum] = "a1a48b23afb206f95e7bbaa9b898d965f90826f6f1d1fc0c1d784ada0cd300fd"
 
diff --git a/meta/recipes-devtools/go/go-1.18/CVE-2023-24537.patch b/meta/recipes-devtools/go/go-1.18/CVE-2023-24537.patch
new file mode 100644
index 0000000000..4521f159ea
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.18/CVE-2023-24537.patch
@@ -0,0 +1,75 @@
+From bf8c7c575c8a552d9d79deb29e80854dc88528d0 Mon Sep 17 00:00:00 2001
+From: Damien Neil <dneil@google.com>
+Date: Mon, 20 Mar 2023 10:43:19 -0700
+Subject: [PATCH] [release-branch.go1.20] mime/multipart: limit parsed mime
+ message sizes
+
+Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1802456
+Reviewed-by: Julie Qiu <julieqiu@google.com>
+Reviewed-by: Roland Shoemaker <bracewell@google.com>
+Run-TryBot: Damien Neil <dneil@google.com>
+Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1802611
+Reviewed-by: Damien Neil <dneil@google.com>
+Change-Id: Ifdfa192d54f722d781a4d8c5f35b5fb72d122168
+Reviewed-on: https://go-review.googlesource.com/c/go/+/481986
+Reviewed-by: Matthew Dempsky <mdempsky@google.com>
+TryBot-Result: Gopher Robot <gobot@golang.org>
+Run-TryBot: Michael Knyszek <mknyszek@google.com>
+Auto-Submit: Michael Knyszek <mknyszek@google.com>
+
+Upstream-Status: Backport [https://github.com/golang/go/commit/126a1d02da82f93ede7ce0bd8d3c51ef627f2104]
+CVE: CVE-2023-24537
+Signed-off-by: Vivek Kumbhar <vkumbhar@mvista.com>
+---
+ src/go/parser/parser_test.go | 16 ++++++++++++++++
+ src/go/scanner/scanner.go    |  5 ++++-
+ 2 files changed, 20 insertions(+), 1 deletion(-)
+
+diff --git a/src/go/parser/parser_test.go b/src/go/parser/parser_test.go
+index 1a46c87..993df63 100644
+--- a/src/go/parser/parser_test.go
++++ b/src/go/parser/parser_test.go
+@@ -746,3 +746,19 @@ func TestScopeDepthLimit(t *testing.T) {
+                }
+        }
+ }
++
++// TestIssue59180 tests that line number overflow doesn't cause an infinite loop.
++func TestIssue59180(t *testing.T) {
++       testcases := []string{
++               "package p\n//line :9223372036854775806\n\n//",
++               "package p\n//line :1:9223372036854775806\n\n//",
++               "package p\n//line file:9223372036854775806\n\n//",
++       }
++
++       for _, src := range testcases {
++               _, err := ParseFile(token.NewFileSet(), "", src, ParseComments)
++               if err == nil {
++                       t.Errorf("ParseFile(%s) succeeded unexpectedly", src)
++               }
++       }
++}
+diff --git a/src/go/scanner/scanner.go b/src/go/scanner/scanner.go
+index f08e28c..ff847b5 100644
+--- a/src/go/scanner/scanner.go
++++ b/src/go/scanner/scanner.go
+@@ -251,13 +251,16 @@ func (s *Scanner) updateLineInfo(next, offs int, text []byte) {
+                return
+        }
+
++       // Put a cap on the maximum size of line and column numbers.
++       // 30 bits allows for some additional space before wrapping an int32.
++       const maxLineCol = 1<<30 - 1
+        var line, col int
+        i2, n2, ok2 := trailingDigits(text[:i-1])
+        if ok2 {
+                //line filename:line:col
+                i, i2 = i2, i
+                line, col = n2, n
+-               if col == 0 {
++               if col == 0 || col > maxLineCol {
+                        s.error(offs+i2, "invalid column number: "+string(text[i2:]))
+                        return
+                }
+--
+2.25.1