diff --git a/python/sglang/srt/layers/attention/aiter_backend.py b/python/sglang/srt/layers/attention/aiter_backend.py
index 18e760dff..27dd14586 100755
--- a/python/sglang/srt/layers/attention/aiter_backend.py
+++ b/python/sglang/srt/layers/attention/aiter_backend.py
@@ -1193,8 +1193,26 @@ class AiterAttnBackend(AttentionBackend):
         max_num_tokens: int,
         kv_indices_buf: Optional[torch.Tensor] = None,
     ):
+        # PR #20978 pads max_bs beyond pool_size for higher cuda-graph
+        # coverage. Reallocate indptr buffers so they fit the padded max_bs.
+        # See: https://github.com/sgl-project/sglang/pull/20978
+        if max_bs + 1 > self.kv_indptr.shape[0]:
+            self.kv_indptr = torch.zeros(
+                (max_bs + 1,), dtype=torch.int32, device=self.device
+            )
+            self.qo_indptr = torch.zeros(
+                (max_bs + 1,), dtype=torch.int32, device=self.device
+            )
+            self.mask_indptr = torch.zeros(
+                (max_bs + 1,), dtype=torch.int64, device=self.device
+            )
+            if hasattr(self, "qo_indptr_"):
+                self.qo_indptr_ = torch.zeros(
+                    (max_bs + 1,), dtype=torch.int32, device=self.device
+                )
+
         self.cuda_graph_kv_last_page_len = torch.ones(
-            max_bs, dtype=torch.int, device=self.device
+            max_bs, dtype=torch.int32, device=self.device
         )
         if kv_indices_buf is None:
             max_num_blocks_per_seq = (
diff --git a/test/registered/amd/test_moriep_small.py b/test/registered/amd/test_moriep_small.py
index 76ccb42d6..1ffc27576 100644
--- a/test/registered/amd/test_moriep_small.py
+++ b/test/registered/amd/test_moriep_small.py
@@ -4,7 +4,9 @@ from types import SimpleNamespace
 
 import requests
 
+from sglang.srt.server_args import ZMQ_TCP_PORT_DELTA
 from sglang.srt.utils import kill_process_tree
+from sglang.srt.utils.network import is_port_available
 from sglang.test.ci.ci_register import register_amd_ci
 from sglang.test.few_shot_gsm8k import run_eval as run_eval_few_shot_gsm8k
 from sglang.test.test_utils import (
@@ -15,6 +17,30 @@ from sglang.test.test_utils import (
     popen_launch_server,
 )
 
+
+def wait_all_ports_release(base_url, timeout_s=60):
+    """Wait until all derived ports are fully released."""
+    import time
+
+    port = int(base_url.split(":")[-1])
+
+    # See https://github.com/sgl-project/sglang/blob/495ef8ec64b6b937e59cd530ad3150172061a008/python/sglang/srt/server_args.py#L6958-L6969
+    offsets = [
+        0,  # no offset
+        ZMQ_TCP_PORT_DELTA,  # dist_init_port
+        ZMQ_TCP_PORT_DELTA + 1,  # detokenizer_port
+        ZMQ_TCP_PORT_DELTA + 2,  # rpc_port
+        ZMQ_TCP_PORT_DELTA + 3,  # metrics_port
+        ZMQ_TCP_PORT_DELTA + 4,  # scheduler_input_port
+    ]
+    for _ in range(timeout_s):
+        if all(is_port_available(port + off) for off in offsets):
+            return
+        time.sleep(1)
+    # Best-effort: log but don't raise so tearDown doesn't break the next class.
+    print(f"Warning: some ports still occupied after {timeout_s}s")
+
+
 register_amd_ci(est_time=1200, suite="stage-c-test-large-8-gpu-amd")
 
 common_args = [
@@ -84,6 +110,7 @@ class TestPureDP(CustomTestCase):
     @classmethod
     def tearDownClass(cls):
         kill_process_tree(cls.process.pid)
+        wait_all_ports_release(cls.base_url)
 
     def test_gsm8k(
         self,
@@ -128,6 +155,7 @@ class TestMTP(CustomTestCase):
     @classmethod
     def tearDownClass(cls):
         kill_process_tree(cls.process.pid)
+        wait_all_ports_release(cls.base_url)
 
     def test_gsm8k(
         self,
@@ -181,6 +209,7 @@ class TestNormal(CustomTestCase):
     @classmethod
     def tearDownClass(cls):
         kill_process_tree(cls.process.pid)
+        wait_all_ports_release(cls.base_url)
 
     def test_gsm8k(
         self,
@@ -230,6 +259,7 @@ class TestLowLatency(CustomTestCase):
     @classmethod
     def tearDownClass(cls):
         kill_process_tree(cls.process.pid)
+        wait_all_ports_release(cls.base_url)
 
     def test_gsm8k(
         self,
@@ -278,6 +308,7 @@ class TestTBOwithNormal(CustomTestCase):
     @classmethod
     def tearDownClass(cls):
         kill_process_tree(cls.process.pid)
+        wait_all_ports_release(cls.base_url)
 
     def test_gsm8k(
         self,
@@ -328,6 +359,7 @@ class TestTBOwithLowLatency(CustomTestCase):
     @classmethod
     def tearDownClass(cls):
         kill_process_tree(cls.process.pid)
+        wait_all_ports_release(cls.base_url)
 
     def test_gsm8k(
         self,
@@ -380,6 +412,7 @@ class TestMTPwithTBONormal(CustomTestCase):
     @classmethod
     def tearDownClass(cls):
         kill_process_tree(cls.process.pid)
+        wait_all_ports_release(cls.base_url)
 
     def test_gsm8k(
         self,
@@ -440,6 +473,7 @@ class TestMTPwithTBOLowLatency(CustomTestCase):
     @classmethod
     def tearDownClass(cls):
         kill_process_tree(cls.process.pid)
+        wait_all_ports_release(cls.base_url)
 
     def test_gsm8k(
         self,