[api_fuzzer] Fix timeout case (#30578)

test/core/end2end/fuzzers/api_fuzzer.cc

@@ -81,8 +81,7 @@
 // IWYU pragma: no_include <google/protobuf/repeated_ptr_field.h>
 
 // Applicable when simulating channel actions. Prevents overflows.
-static constexpr uint64_t kMaxWaitMs =
-    31536000000;  // 1 year (24 * 365 * 3600 * 1000)
+static constexpr uint64_t kMaxWaitMs = grpc_core::Duration::Hours(1).millis();
 // Applicable when simulating channel actions. Prevents overflows.
 static constexpr uint64_t kMaxAddNReadableBytes = (2 * 1024 * 1024);  // 2GB
 // Applicable when simulating channel actions. Prevents overflows.

test/core/end2end/fuzzers/api_fuzzer_corpus/timeout-36dbe33cfc4d07ab5c01f283c901ee35bc6de2fd

@@ -0,0 +1,49 @@
+actions {
+  create_server {
+  }
+}
+actions {
+  create_channel {
+    target: "unix::peht046,,\343\236\2349,Sac,,t"
+    channel_actions {
+      add_n_bytes_readable: 89
+      wait_ms: 35195367205109760
+    }
+    channel_actions {
+      add_n_bytes_writable: 31769
+      add_n_bytes_readable: 35195367205109760
+    }
+    channel_actions {
+      wait_ms: 20
+    }
+  }
+}
+actions {
+  create_call {
+    propagation_mask: 9869440
+    method {
+      value: "v"
+    }
+    timeout: 100000000
+  }
+}
+actions {
+  queue_batch {
+    operations {
+      send_initial_metadata {
+        metadata {
+          key {
+            value: "grpc-tags-bin"
+          }
+          value {
+            value: "unix::peht046,,\343\236\2349,Sac,,t"
+          }
+        }
+      }
+    }
+  }
+}
+actions {
+}
+actions {
+}