From 91eb28f6bcf377da3cbae6f3a566be5b7645e194 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Wed, 19 Apr 2017 15:24:59 -0700
Subject: [PATCH 1/3] Update to avoid ubsan failure

---
 third_party/zlib | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/third_party/zlib b/third_party/zlib
index 50893291621..cacf7f1d4e3 160000
--- a/third_party/zlib
+++ b/third_party/zlib
@@ -1 +1 @@
-Subproject commit 50893291621658f355bc5b4d450a8d06a563053d
+Subproject commit cacf7f1d4e3d44d871b605da3b647f07d718623f

From d1a6423199d3b38007e65d2a9cad492e7ebc25cc Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Wed, 19 Apr 2017 15:34:29 -0700
Subject: [PATCH 2/3] Use stdlib to avoid ubsan errors

---
 test/core/support/time_test.c | 29 +++++++----------------------
 1 file changed, 7 insertions(+), 22 deletions(-)

diff --git a/test/core/support/time_test.c b/test/core/support/time_test.c
index 4cb36a788c1..00d0b765036 100644
--- a/test/core/support/time_test.c
+++ b/test/core/support/time_test.c
@@ -47,32 +47,17 @@ static void to_fp(void *arg, const char *buf, size_t len) {
   fwrite(buf, 1, len, (FILE *)arg);
 }
 
-/* Convert gpr_uintmax x to ascii base b (2..16), and write with
-   (*writer)(arg, ...), zero padding to "chars" digits).  */
-static void u_to_s(uintmax_t x, unsigned base, int chars,
-                   void (*writer)(void *arg, const char *buf, size_t len),
-                   void *arg) {
-  char buf[64];
-  char *p = buf + sizeof(buf);
-  do {
-    *--p = "0123456789abcdef"[x % base];
-    x /= base;
-    chars--;
-  } while (x != 0 || chars > 0);
-  (*writer)(arg, p, (size_t)(buf + sizeof(buf) - p));
-}
-
 /* Convert gpr_intmax x to ascii base b (2..16), and write with
    (*writer)(arg, ...), zero padding to "chars" digits).  */
-static void i_to_s(intmax_t x, unsigned base, int chars,
+static void i_to_s(intmax_t x, int base, int chars,
                    void (*writer)(void *arg, const char *buf, size_t len),
                    void *arg) {
-  if (x < 0) {
-    (*writer)(arg, "-", 1);
-    u_to_s((uintmax_t)-x, base, chars - 1, writer, arg);
-  } else {
-    u_to_s((uintmax_t)x, base, chars, writer, arg);
-  }
+  char buf[64];
+  char fmt[32];
+  GPR_ASSERT(base == 16 || base == 10);
+  sprintf(fmt, "%%0%d%s", chars, base == 16 ? PRIxMAX : PRIdMAX);
+  sprintf(buf, fmt, x);
+  (*writer)(arg, buf, strlen(buf));
 }
 
 /* Convert ts to ascii, and write with (*writer)(arg, ...).  */

From 989aa7f97d91478bfdfd8e66e99e2dabda160e72 Mon Sep 17 00:00:00 2001
From: Craig Tiller <ctiller@google.com>
Date: Wed, 19 Apr 2017 15:46:43 -0700
Subject: [PATCH 3/3] Fix sanity

---
 tools/run_tests/sanity/check_submodules.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/run_tests/sanity/check_submodules.sh b/tools/run_tests/sanity/check_submodules.sh
index c5a0dbbef32..0a9c1cc046c 100755
--- a/tools/run_tests/sanity/check_submodules.sh
+++ b/tools/run_tests/sanity/check_submodules.sh
@@ -48,7 +48,7 @@ cat << EOF | awk '{ print $1 }' | sort > $want_submodules
  ec44c6c1675c25b9827aacd08c02433cccde7780 third_party/googletest (release-1.8.0)
  593e917c176b5bc5aafa57bf9f6030d749d91cd5 third_party/protobuf (v3.1.0-alpha-1-326-g593e917)
  bcad91771b7f0bff28a1cac1981d7ef2b9bcef3c third_party/thrift (bcad917)
- 50893291621658f355bc5b4d450a8d06a563053d third_party/zlib (v1.2.8)
+ cacf7f1d4e3d44d871b605da3b647f07d718623f third_party/zlib (v1.2.11)
  7691f773af79bf75a62d1863fd0f13ebf9dc51b1 third_party/cares/cares (1.12.0)
 EOF