[PATCH 2/5] icu: fix CVE-2018-18928

[Ross Burton <ross.burton@intel.com>]

Signed-off-by: Ross Burton <ross.burton@intel.com>
---
 meta/recipes-support/icu/icu/CVE-2018-18928.patch | 63 +++++++++++++++++++++++
 meta/recipes-support/icu/icu_63.1.bb              |  1 +
 2 files changed, 64 insertions(+)
 create mode 100644 meta/recipes-support/icu/icu/CVE-2018-18928.patch

diff --git a/meta/recipes-support/icu/icu/CVE-2018-18928.patch b/meta/recipes-support/icu/icu/CVE-2018-18928.patch
new file mode 100644
index 00000000000..19c50e4e76a
--- /dev/null
+++ b/meta/recipes-support/icu/icu/CVE-2018-18928.patch
@@ -0,0 +1,63 @@
+CVE: CVE-2018-18928
+Upstream-Status: Backport
+Signed-off-by: Ross Burton <ross.burton@intel.com>
+
+From 53d8c8f3d181d87a6aa925b449b51c4a2c922a51 Mon Sep 17 00:00:00 2001
+From: Shane Carr <shane@unicode.org>
+Date: Mon, 29 Oct 2018 23:52:44 -0700
+Subject: [PATCH] ICU-20246 Fixing another integer overflow in number parsing.
+
+---
+ i18n/fmtable.cpp                          |  2 +-
+ i18n/number_decimalquantity.cpp           |  5 ++++-
+ test/intltest/numfmtst.cpp                |  8 ++++++++
+ 6 files changed, 31 insertions(+), 4 deletions(-)
+
+diff --git a/i18n/fmtable.cpp b/i18n/fmtable.cpp
+index 45c7024fc29..8601d95f4a6 100644
+--- a/i18n/fmtable.cpp
++++ b/i18n/fmtable.cpp
+@@ -734,7 +734,7 @@ CharString *Formattable::internalGetCharString(UErrorCode &status) {
+       // not print scientific notation for magnitudes greater than -5 and smaller than some amount (+5?).
+       if (fDecimalQuantity->isZero()) {
+         fDecimalStr->append("0", -1, status);
+-      } else if (std::abs(fDecimalQuantity->getMagnitude()) < 5) {
++      } else if (fDecimalQuantity->getMagnitude() != INT32_MIN && std::abs(fDecimalQuantity->getMagnitude()) < 5) {
+         fDecimalStr->appendInvariantChars(fDecimalQuantity->toPlainString(), status);
+       } else {
+         fDecimalStr->appendInvariantChars(fDecimalQuantity->toScientificString(), status);
+diff --git a/i18n/number_decimalquantity.cpp b/i18n/number_decimalquantity.cpp
+index 47b930a564b..d5dd7ae694c 100644
+--- a/i18n/number_decimalquantity.cpp
++++ b/i18n/number_decimalquantity.cpp
+@@ -898,7 +898,10 @@ UnicodeString DecimalQuantity::toScientificString() const {
+     }
+     result.append(u'E');
+     int32_t _scale = upperPos + scale;
+-    if (_scale < 0) {
++    if (_scale == INT32_MIN) {
++        result.append({u"-2147483648", -1});
++        return result;
++    } else if (_scale < 0) {
+         _scale *= -1;
+         result.append(u'-');
+     } else {
+diff --git a/test/intltest/numfmtst.cpp b/test/intltest/numfmtst.cpp
+index 34355939113..8d52dc122bf 100644
+--- a/test/intltest/numfmtst.cpp
++++ b/test/intltest/numfmtst.cpp
+@@ -9226,6 +9226,14 @@ void NumberFormatTest::Test20037_ScientificIntegerOverflow() {
+     assertEquals(u"Should not overflow and should parse only the first exponent",
+                  u"1E-2147483647",
+                  {sp.data(), sp.length(), US_INV});
++
++    // Test edge case overflow of exponent
++    result = Formattable();
++    nf->parse(u".0003e-2147483644", result, status);
++    sp = result.getDecimalNumber(status);
++    assertEquals(u"Should not overflow",
++                 u"3E-2147483648",
++                 {sp.data(), sp.length(), US_INV});
+ }
+ 
+ void NumberFormatTest::Test13840_ParseLongStringCrash() {
diff --git a/meta/recipes-support/icu/icu_63.1.bb b/meta/recipes-support/icu/icu_63.1.bb
index e593dc1bdbd..961f022ad7a 100644
--- a/meta/recipes-support/icu/icu_63.1.bb
+++ b/meta/recipes-support/icu/icu_63.1.bb
@@ -17,6 +17,7 @@ SRC_URI = "${BASE_SRC_URI} \
            file://icu-pkgdata-large-cmd.patch \
            file://fix-install-manx.patch \
            file://0002-Add-ARC-support.patch \
+           file://CVE-2018-18928.patch \
            "
 
 SRC_URI_append_class-target = "\
-- 
2.11.0