From 6163da513578c2526c3b1de16a3deb8c913e2c34 Mon Sep 17 00:00:00 2001
From: yang-g <yangg@google.com>
Date: Thu, 13 Apr 2017 09:39:42 -0700
Subject: [PATCH] Disallow empty method slice in api_fuzzer

---
 test/core/end2end/fuzzers/api_fuzzer.c        |   3 +++
 .../clusterfuzz-testcase-5867145026076672     | Bin 0 -> 46 bytes
 tools/run_tests/generated/tests.json          |  23 ++++++++++++++++++
 3 files changed, 26 insertions(+)
 create mode 100644 test/core/end2end/fuzzers/api_fuzzer_corpus/clusterfuzz-testcase-5867145026076672

diff --git a/test/core/end2end/fuzzers/api_fuzzer.c b/test/core/end2end/fuzzers/api_fuzzer.c
index a0acf5bf602..cd983a70a65 100644
--- a/test/core/end2end/fuzzers/api_fuzzer.c
+++ b/test/core/end2end/fuzzers/api_fuzzer.c
@@ -932,6 +932,9 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
         }
         uint32_t propagation_mask = read_uint32(&inp);
         grpc_slice method = read_string_like_slice(&inp);
+        if (GRPC_SLICE_LENGTH(method) == 0) {
+          ok = false;
+        }
         grpc_slice host = read_string_like_slice(&inp);
         gpr_timespec deadline =
             gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
diff --git a/test/core/end2end/fuzzers/api_fuzzer_corpus/clusterfuzz-testcase-5867145026076672 b/test/core/end2end/fuzzers/api_fuzzer_corpus/clusterfuzz-testcase-5867145026076672
new file mode 100644
index 0000000000000000000000000000000000000000..3fd5427b46662d86534978f322d512466c8765af
GIT binary patch
literal 46
wcmZQ7PAw`+En;9`Vc<$+Wc<HBl$(c{0SuTJc$gTOfJ_I*U!4pLjMv2(0MTa${r~^~

literal 0
HcmV?d00001

diff --git a/tools/run_tests/generated/tests.json b/tools/run_tests/generated/tests.json
index 12d48f219d7..7b1140e4943 100644
--- a/tools/run_tests/generated/tests.json
+++ b/tools/run_tests/generated/tests.json
@@ -85053,6 +85053,29 @@
     ], 
     "uses_polling": false
   }, 
+  {
+    "args": [
+      "test/core/end2end/fuzzers/api_fuzzer_corpus/clusterfuzz-testcase-5867145026076672"
+    ], 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [
+      "tsan"
+    ], 
+    "exclude_iomgrs": [
+      "uv"
+    ], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "api_fuzzer_one_entry", 
+    "platforms": [
+      "mac", 
+      "linux"
+    ], 
+    "uses_polling": false
+  }, 
   {
     "args": [
       "test/core/end2end/fuzzers/api_fuzzer_corpus/clusterfuzz-testcase-5965570207907840"