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date\n{\"jsonrpc\":\"2.0\",\"id\":1,\"result\":{\"protocolVersion\":\"2024-11-05\",\"capabilities\":{\"experimental\":{},\"prompts\":{\"listChanged\":false},\"resources\":{\"subscribe\":false,\"listChanged\":false},\"tools\":{\"listChanged\":false}},\"serverInfo\":{\"name\":\"kernel-mail\",\"version\":\"1.26.0\"}}}\nShell cwd was reset to /home/josie/development/forks/linux","is_error":false}]},"uuid":"a1511fb3-ea3b-41cd-971c-ffdb76c2f68f","timestamp":"2026-03-01T09:59:50.079Z","toolUseResult":{"stdout":"INFO:kernel_mail_mcp.server:Checking index freshness...\nINFO:kernel_mail_mcp.indexer:Mbox unchanged, skipping index\nINFO:kernel_mail_mcp.server:Index is up to date\n{\"jsonrpc\":\"2.0\",\"id\":1,\"result\":{\"protocolVersion\":\"2024-11-05\",\"capabilities\":{\"experimental\":{},\"prompts\":{\"listChanged\":false},\"resources\":{\"subscribe\":false,\"listChanged\":false},\"tools\":{\"listChanged\":false}},\"serverInfo\":{\"name\":\"kernel-mail\",\"version\":\"1.26.0\"}}}","stderr":"\nShell cwd was reset to /home/josie/development/forks/linux","interrupted":false,"isImage":false,"noOutputExpected":false},"sourceToolAssistantUUID":"18faa6d3-c7c7-4b9e-9b84-3ec569c201fc"} {"parentUuid":"a1511fb3-ea3b-41cd-971c-ffdb76c2f68f","isSidechain":false,"userType":"external","cwd":"/home/josie/development/forks/linux","sessionId":"0264110d-7530-4e6f-9308-603 2026/03/07 12:42:03 - Running Heartbeat 1772883723 2026/03/07 12:43:03 - Running Heartbeat 1772883783 2026/03/07 12:44:03 - Running Heartbeat 1772883843 2026/03/07 12:45:03 - Running Heartbeat 1772883903 2026/03/07 12:46:03 - Running Heartbeat 1772883963 2026/03/07 12:47:03 - Running Heartbeat 1772884023 2026/03/07 12:48:03 - Running Heartbeat 1772884083 2026/03/07 12:49:03 - Running Heartbeat 1772884143 2026/03/07 12:50:03 - Running Heartbeat 1772884203 2026/03/07 12:51:03 - Running Heartbeat 1772884263 2026/03/07 12:52:03 - Running Heartbeat 1772884323 2026/03/07 12:53:03 - Running Heartbeat 1772884383 2026/03/07 12:54:03 - Running Heartbeat 1772884443 2026/03/07 12:55:03 - Running Heartbeat 1772884503 2026/03/07 12:56:03 - Running Heartbeat 1772884563 2026/03/07 12:57:03 - Running Heartbeat 1772884623 2026/03/07 12:58:03 - Running Heartbeat 1772884683 2026/03/07 12:59:03 - Running Heartbeat 1772884743 2026/03/07 13:00:03 - Running Heartbeat 1772884803 2026/03/07 13:01:03 - Running Heartbeat 1772884863 2026/03/07 13:02:03 - Running Heartbeat 1772884923 2026/03/07 13:03:03 - Running Heartbeat 1772884983 2026/03/07 13:04:03 - Running Heartbeat 1772885043 2026/03/07 13:05:03 - Running Heartbeat 1772885103 2026/03/07 13:06:03 - Running Heartbeat 1772885163 2026/03/07 13:07:03 - Running Heartbeat 1772885223 2026/03/07 13:08:03 - Running Heartbeat 1772885283 2026/03/07 13:09:03 - Running Heartbeat 1772885343 2026/03/07 13:10:03 - Running Heartbeat 1772885403 2026/03/07 13:11:03 - Running Heartbeat 1772885463 2026/03/07 13:12:03 - Running Heartbeat 1772885523 2026/03/07 13:13:03 - Running Heartbeat 1772885583 2026/03/07 13:14:03 - Running Heartbeat 1772885643 2026/03/07 13:15:03 - Running Heartbeat 1772885703 2026/03/07 13:16:03 - Running Heartbeat 1772885763 2026/03/07 13:17:03 - Running Heartbeat 1772885823 2026/03/07 13:18:03 - Running Heartbeat 1772885883 2026/03/07 13:19:03 - Running Heartbeat 1772885943 2026/03/07 13:20:03 - Running Heartbeat 1772886003 2026/03/07 13:21:03 - Running Heartbeat 1772886063 2026/03/07 13:22:03 - Running Heartbeat 1772886123 2026/03/07 13:23:03 - Running Heartbeat 1772886183 2026/03/07 13:24:03 - Running Heartbeat 1772886243 2026/03/07 13:25:03 - Running Heartbeat 1772886303 2026/03/07 13:26:03 - Running Heartbeat 1772886363 2026/03/07 13:27:03 - Running Heartbeat 1772886423 2026/03/07 13:28:03 - Running Heartbeat 1772886483 2026/03/07 13:29:03 - Running Heartbeat 1772886543 2026/03/07 13:30:03 - Running Heartbeat 1772886603 2026/03/07 13:31:03 - Running Heartbeat 1772886663 2026/03/07 13:32:03 - Running Heartbeat 1772886723 2026/03/07 13:33:03 - Running Heartbeat 1772886783 2026/03/07 13:34:03 - Running Heartbeat 1772886843 2026/03/07 13:35:03 - Running Heartbeat 1772886903 2026/03/07 13:36:03 - Running Heartbeat 1772886963 2026/03/07 13:37:03 - Running Heartbeat 1772887023 2026/03/07 13:38:03 - Running Heartbeat 1772887083 2026/03/07 13:39:03 - Running Heartbeat 1772887143 2026/03/07 13:40:03 - Running Heartbeat 1772887203 2026/03/07 13:41:03 - Running Heartbeat 1772887263 2026/03/07 13:42:03 - Running Heartbeat 1772887323 2026/03/07 13:43:03 - Running Heartbeat 1772887383 2026/03/07 13:44:03 - Running Heartbeat 1772887443 2026/03/07 13:45:03 - Running Heartbeat 1772887503 2026/03/07 13:46:03 - Running Heartbeat 1772887563 2026/03/07 13:47:03 - Running Heartbeat 1772887623 2026/03/07 13:48:03 - Running Heartbeat 1772887683 2026/03/07 13:49:03 - Running Heartbeat 1772887743 2026/03/07 13:50:03 - Running Heartbeat 1772887803 2026/03/07 13:51:03 - Running Heartbeat 1772887863 2026/03/07 13:52:03 - Running Heartbeat 1772887923 2026/03/07 14:12:03 - Running Heartbeat 1772889123 2026/03/07 14:13:03 - Running Heartbeat 1772889183 2026/03/07 14:14:03 - Running Heartbeat 1772889243 2026/03/07 14:15:03 - Running Heartbeat 1772889303 2026/03/07 14:16:03 - Running Heartbeat 1772889363 2026/03/07 14:17:03 - Running Heartbeat 1772889423 2026/03/07 14:18:03 - Running Heartbeat 1772889483 2026/03/07 14:19:03 - Running Heartbead7d2c7434","version":"2.1.63","gitBranch":"master","slug":"quiet-shimmying-bunny","message":{"model":"claude-opus-4-6","id":"msg_01ND6MtpVPQSg5qrHJ4LouqM","type":"message","role":"assistant","content":[{"type":"text","text":"Server starts, index is already built from the earlier smoke test. Let me now test an actual tool call -- search for something:"}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":424,"cache_read_input_tokens":136385,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":424},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CYcAXECqueV1SUpwzAs6M","type":"assistant","uuid":"54ee7eb9-5297-4ccc-80ed-d9d4327fe4f2","timestamp":"2026-03-01T09:59:55.165Z"} {"parentUuid":"54ee7eb9-5297-4ccc-80ed-d9d4327fe4f2","isSidechain":false,"userType":"external","cwd":"/home/josie/development/forks/linux","sessionId":"0264110d-7530-4e6f-9308-60ad7d2c7434","version":"2.1.63","gitBranch":"master","slug":"quiet-shimmying-bunny","message":{"model":"claude-opus-4-6","id":"msg_01ND6MtpVPQSg5qrHJ4LouqM","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01NStNdxnBWepsu7keGXNxpq","name":"Bash","input":{"command":"cd ~/development/personal/kernel-mail-mcp && printf '{\"jsonrpc\":\"2.0\",\"id\":1,\"method\":\"initialize\",\"params\":{\"protocolVersion\":\"2024-11-05\",\"capabilities\":{},\"clientInfo\":{\"name\":\"test\",\"version\":\"0.1\"}}}\\n{\"jsonrpc\":\"2.0\",\"method\":\"notifications/initialized\"}\\n{\"jsonrpc\":\"2.0\",\"id\":2,\"method\":\"tools/list\"}\\n' | timeout 30 uv run python -m kernel_mail_mcp 2>/dev/null | grep -v '^INFO' | python3 -c \"\nimport sys, json\nfor line in sys.stdin:\n line = line.strip()\n if not line: continue\n try:\n d = json.loads(line)\n if d.get('id') == 2:\n tools = d['result']['tools']\n for t in tools:\n print(f\\\" {t['name']}: {t['description'][:80]}\\\")\n except: pass\n\"","description":"List available MCP tools"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":424,"cache_read_input_tokens":136385,"output_tokens":345,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":424,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CYcAXECqueV1SUpwzAs6M","type":"assistant","uuid":"7d2a05d0-93aa-4324-b222-0bcc97107d72","timestamp":"2026-03-01T09:59:58.403Z"} {"parentUuid":"7d2a05d0-93aa-4324-b222-0bcc97107d72","isSidechain":false,"userType":"external","cwd":"/home/josie/development/forks/linux","sessionId":"0264110d-7530-4e6f-9308-60ad7d2c7434","version":"2.1.63","gitBranch":"master","slug":"quiet-shimmying-bunny","type":"progress","data":{"type":"hook_progress","hookEvent":"PreToolUse","hookName":"PreToolUse:Bash","command":"python3 ${CLAUDE_PLUGIN_ROOT}/hooks/pretooluse.py"},"toolUseID":"toolu_01NStNdxnBWepsu7keGXNxpq","parentToolUseID":"toolu_01NStNdxnBWepsu7keGXNxpq","uuid":"619dbccd-2120-4716-be21-cec042206c36","timestamp":"2026-03-01T09:59:58.409Z"} {"parentUuid":"619dbccd-2120-4716-be21-cec042206c36","isSidechain":false,"userType":"external","cwd":"/home/josie/development/forks/linux","sessionId":"0264110d-7530-4e6f-9308-60ad7d2c7434","version":"2.1.63","gitBranch":"master","slug":"quiet-shimmying-bunny","type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Bash","command":"python3 ${CLAUDE_PLUGIN_ROOT}/hooks/posttooluse.py"},"parentToolUseID":"toolu_01NStNdxnBWepsu7keGXNxpq","toolUseID":"toolu_01NStNdxnBWepsu7keGXNxpq","timestamp":"2026-03-01T10:00:00.088Z","uuid":"21e6d294-609f-4735-b76f-a3d164ba813e"} {"parentUuid":"7d2a05d0-93aa-4324-b222-0bcc97107d72","isSidechain":false,"userType":"external","cwd":"/home/josie/development/forks/linux","sessionId":"0264110d-7530-4e6f-9308-60ad7d2c7434","version":"2.1.63","gitBranch":"master","slug":"quiet-shimmying-bunny","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01NStNdxnBWepsu7keGXNxpq","type":"tool_result","content":" search_mail: Search kernel mailing list emails by full-text query.\n\nArgs:\n query: Full-tex\n get_mail: Get a single kernel mailing list email by Message-ID.\n\nArgs:\n message_id: The\n get_mail_thread: Get the full email thread containing a given message.\n\nReconstructs the thread b\n reindex_mail: Force a full reindex of the kernel mbox file.\n\nUse this if the search index seem\nShell cwd was reset to /home/josie/development/forks/linux","is_error":false}]},"uuid":"c1e083e8-1b44-4992-a45c-61bdb21636f3","timestamp":"2026-03-01T10:00:00.087Z","toolUseResult":{"stdout":" search_mail: Search kernel mailing list emails by full-text query.\n\nArgs:\n query: Full-tex\n get_mail: Get a single kernel mailing list email by Message-ID.\n\nArgs:\n message_id: The\n get_mail_thread: Get the full email thread containing a given message.\n\nReconstructs the thread b\n reindex_mail: Force a full reindex of the kernel mbox file.\n\nUse this if the search index seem","stderr":"\nShell cwd was reset to /home/josie/development/forks/linux","interrupted":false,"isImage":false,"noOutputExpected":false},"sourceToolAssistantUUID":"7d2a05d0-93aa-4324-b222-0bcc97107d72"} {"parentUuid":"c1e083e8-1b44-4992-a45c-61bdb21636f3","isSidechain":false,"userType":"external","cwd":"/home/josie/development/forks/linux","sessionId":"0264110d-7530-4e6f-9308-60ad7d2c7434","version":"2.1.63","gitBranch":"master","slug":"quiet-shimmying-bunny","message":{"model":"claude-opus-4-6","id":"msg_01ThXvtZCA2gDRY3WH5uvuV7","type":"message","role":"assistant","content":[{"type":"text","text":"All 4 tools are registered. Now let me test an actual search:"}],"stop_reason":null,"stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":484,"cache_read_input_tokens":136809,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":484},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CYcAXwz49ZDn1f6znC9Xe","type":"assistant","uuid":"7cf734b9-1a75-4586-9617-0a15937a69bc","timestamp":"2026-03-01T10:00:04.094Z"} {"parentUuid":"7cf734b9-1a75-4586-9617-0a15937a69bc","isSidechain":false,"userType":"external","cwd":"/home/josie/development/forks/linux","sessionId":"0264110d-7530-4e6f-9308-60ad7d2c7434","version":"2.1.63","gitBranch":"master","slug":"quiet-shimmying-bunny","message":{"model":"claude-opus-4-6","id":"msg_01ThXvtZCA2gDRY3WH5uvuV7","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01MVLVxKEiJBE9Mk9xPtUQZc","name":"Bash","input":{"command":"cd ~/development/personal/kernel-mail-mcp && printf '{\"jsonrpc\":\"2.0\",\"id\":1,\"method\":\"initialize\",\"params\":{\"protocolVersion\":\"2024-11-05\",\"capabilities\":{},\"clientInfo\":{\"name\":\"test\",\"version\":\"0.1\"}}}\\n{\"jsonrpc\":\"2.0\",\"method\":\"notifications/initialized\"}\\n{\"jsonrpc\":\"2.0\",\"id\":3,\"method\":\"tools/call\",\"params\":{\"name\":\"search_mail\",\"arguments\":{\"query\":\"KVM null pointer dereference\",\"limit\":5}}}\\n' | timeout 30 uv run python -m kernel_mail_mcp 2>/dev/null | python3 -c \"\nimport sys, json\nfor line in sys.stdin:\n line = line.strip()\n if not line: continue\n try:\n d = json.loads(line)\n if d.get('id') == 3:\n for c in d['result']['content']:\n print(c['text'][:600])\n except: pass\n\"","description":"Test search_mail tool with a real query"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":484,"cache_read_input_tokens":136809,"output_tokens":339,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":484,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CYcAXwz49ZDn1f6znC9Xe","type":"assistant","uuid":"2372d905-a9d4-456b-8492-d4a944bb61eb","timestamp":"2026-03-01T10:00:07.117Z"} {"parentUuid":"2372d905-a9d4-456b-8492-d4a944bb61eb","isSidechain":false,"userType":"external","cwd":"/home/josie/development/forks/linux","sessionId":"0264110d-7530-4e6f-9308-60ad7d2c7434","version":"2.1.63","gitBranch":"master","slug":"quiet-shimmying-bunny","type":"progress","data":{"type":"hook_progress","hookEvent":"PreToolUse","hookName":"PreToolUse:Bash","command":"python3 ${CLAUDE_PLUGIN_ROOT}/hooks/pretooluse.py"},"toolUseID":"toolu_01MVLVxKEiJBE9Mk9xPtUQZc","parentToolUseID":"toolu_01MVLVxKEiJBE9Mk9xPtUQZc","uuid":"cef8df76-8230-405d-a10a-63a3c81ee8fe","timestamp":"2026-03-01T10:00:07.121Z"} {"parentUuid":"cef8df76-8230-405d-a10a-63a3c81ee8fe","isSidechain":false,"userType":"external","cwd":"/home/josie/development/forks/linux","sessionId":"0264110d-7530-4e6f-9308-60ad7d2c7434","version":"2.1.63","gitBranch":"master","slug":"quiet-shimmying-bunny","type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Bash","command":"python3 ${CLAUDE_PLUGIN_ROOT}/hooks/posttooluse.py"},"parentToolUseID":"toolu_01MVLVxKEiJBE9Mk9xPtUQZc","toolUseID":"toolu_01MVLVxKEiJBE9Mk9xPtUQZc","timestamp":"2026-03-01T10:00:08.405Z","uuid":"50658163-9ad4-45d0-94ee-ecdf26438f5f"} {"parentUuid":"2372d905-a9d4-456b-8492-d4a944bb61eb","isSidechain":false,"userType":"external","cwd":"/home/josie/development/forks/linux","sessionId":"0264110d-7530-4e6f-9308-60ad7d2c7434","version":"2.1.63","gitBranch":"master","slug":"quiet-shimmying-bunny","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01MVLVxKEiJBE9Mk9xPtUQZc","type":"tool_result","content":"Message-ID: <2025111343-landowner-bush-149b@gregkh>\nFrom: Greg KH \nDate: 2025-11-13T08:25:32-05:00\nSubject: Re: [PATCH] libfs: Fix NULL pointer access in\r\n simple_recursive_removal\nList: \nSnippet: ...How is inode >>>NULL<< [292618.520532] BUG: unable to handle kernel >>>NULL<<< >>>pointer<<< >>>dereference<<< at 00000000000000a0\r\n> [...]\r\n> [292618.560398] RIP: 0010:down_write+0x12/0x30\r\n> [292618.565580] Code: 83 f8 01 74 08 48 c7 47 20...\n\n---\nMessage-ID: <20251118170450.GG2441659@ZenIV>\nFrom: Al Viro \nFrom: Greg KH \nDate: 2025-11-13T08:25:32-05:00\nSubject: Re: [PATCH] libfs: Fix NULL pointer access in\r\n simple_recursive_removal\nList: \nSnippet: ...How is inode >>>NULL<< [292618.520532] BUG: unable to handle kernel >>>NULL<<< >>>pointer<<< >>>dereference<<< at 00000000000000a0\r\n> [...]\r\n> [292618.560398] RIP: 0010:down_write+0x12/0x30\r\n> [292618.565580] Code: 83 f8 01 74 08 48 c7 47 20...\n\n---\nMessage-ID: <20251118170450.GG2441659@ZenIV>\nFrom: Al Viro \"}}}\\n' | timeout 30 uv run python -m kernel_mail_mcp 2>/dev/null | python3 -c \"\nimport sys, json\nfor line in sys.stdin:\n line = line.strip()\n if not line: continue\n try:\n d = json.loads(line)\n if d.get('id') == 4:\n text = d['result']['content'][0]['text']\n print(text[:1000])\n except: pass\n\"","description":"Test get_mail_thread tool"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":631,"cache_read_input_tokens":137293,"output_tokens":362,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":631,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CYcAYZVjMRbnaKmtsbYVP","type":"assistant","uuid":"a2a33906-666b-4cac-af74-20b690e0163d","timestamp":"2026-03-01T10:00:15.351Z"} {"parentUuid":"a2a33906-666b-4cac-af74-20b690e0163d","isSidechain":false,"userType":"external","cwd":"/home/josie/development/forks/linux","sessionId":"0264110d-7530-4e6f-9308-60ad7d2c7434","version":"2.1.63","gitBranch":"master","slug":"quiet-shimmying-bunny","type":"progress","data":{"type":"hook_progress","hookEvent":"PreToolUse","hookName":"PreToolUse:Bash","command":"python3 ${CLAUDE_PLUGIN_ROOT}/hooks/pretooluse.py"},"toolUseID":"toolu_01Va82Xr2TDLDZyBBJMqTxmB","parentToolUseID":"toolu_01Va82Xr2TDLDZyBBJMqTxmB","uuid":"713c21fe-b4c7-444d-b70e-49e15cb15b74","timestamp":"2026-03-01T10:00:15.353Z"} {"parentUuid":"713c21fe-b4c7-444d-b70e-49e15cb15b74","isSidechain":false,"userType":"external","cwd":"/home/josie/development/forks/linux","sessionId":"0264110d-7530-4e6f-9308-60ad7d2c7434","version":"2.1.63","gitBranch":"master","slug":"quiet-shimmying-bunny","type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Bash","command":"python3 ${CLAUDE_PLUGIN_ROOT}/hooks/posttooluse.py"},"parentToolUseID":"toolu_01Va82Xr2TDLDZyBBJMqTxmB","toolUseID":"toolu_01Va82Xr2TDLDZyBBJMqTxmB","timestamp":"2026-03-01T10:00:16.836Z","uuid":"a93253c8-0f3b-4827-bbba-e6a957d8ffd4"} {"parentUuid":"a2a33906-666b-4cac-af74-20b690e0163d","isSidechain":false,"userType":"external","cwd":"/home/josie/development/forks/linux","sessionId":"0264110d-7530-4e6f-9308-60ad7d2c7434","version":"2.1.63","gitBranch":"master","slug":"quiet-shimmying-bunny","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01Va82Xr2TDLDZyBBJMqTxmB","type":"tool_result","content":"Thread (3 messages):\n\nMessage-ID: <20251113052357.41868-1-r4o5m6e8o@163.com>\nFrom: \"rom.wang\" \nDate: 2025-11-13T13:23:57+08:00\nSubject: [PATCH] libfs: Fix NULL pointer access in simple_recursive_removal\n\nFrom: Yufeng Wang \r\n\r\nThere is an issue in the kernel:\r\nif inode is NULL pointer. the function \"inode_lock_nested\"\r\n(or function \"inode_lock\" before)\r\na crash will happen at code \"&inode->i_rwsem\".\r\n[292618.520532] BUG: unable to handle kernel NULL pointer dereference at 00000000000000a0\r\n[...]\r\n[292618.560398] RIP: 0010:down_write+0x12/0x30\r\n[292618.565580] Code: 83 f8 01 74 08 48 c7 47 20 01 00 00 00 f3 c3 66 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 ba 01 00 00 00 ff ff ff ff 48 89 f8 48 0f c1 10 85 d2 74 05 e8 00 43 ff ff 65 48 8b 04 25 80 5c 01\r\n[292618.587219] RSP: 0018:ffffb898dc86fc20 EFLAGS: 00010246\r\n[292618.593666] RAX: 00000000000000a0 RBX: ffff94c84f363950 RCX: ffffff8000000000\r\n[292618.602255] RDX: ffffffff00000001 RSI: 00000\nShell cwd was reset to /home/josie/development/forks/linux","is_error":false}]},"uuid":"3d371e89-8b75-4bc4-a193-1a3417eedb95","timestamp":"2026-03-01T10:00:16.834Z","toolUseResult":{"stdout":"Thread (3 messages):\n\nMessage-ID: <20251113052357.41868-1-r4o5m6e8o@163.com>\nFrom: \"rom.wang\" \nDate: 2025-11-13T13:23:57+08:00\nSubject: [PATCH] libfs: Fix NULL pointer access in simple_recursive_removal\n\nFrom: Yufeng Wang \r\n\r\nThere is an issue in the kernel:\r\nif inode is NULL pointer. the function \"inode_lock_nested\"\r\n(or function \"inode_lock\" before)\r\na crash will happen at code \"&inode->i_rwsem\".\r\n[292618.520532] BUG: unable to handle kernel NULL pointer dereference at 00000000000000a0\r\n[...]\r\n[292618.560398] RIP: 0010:down_write+0x12/0x30\r\n[292618.565580] Code: 83 f8 01 74 08 48 c7 47 20 01 00 00 00 f3 c3 66 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 ba 01 00 00 00 ff ff ff ff 48 89 f8 48 0f c1 10 85 d2 74 05 e8 00 43 ff ff 65 48 8b 04 25 80 5c 01\r\n[292618.587219] RSP: 0018:ffffb898dc86fc20 EFLAGS: 00010246\r\n[292618.593666] RAX: 00000000000000a0 RBX: ffff94c84f363950 RCX: ffffff8000000000\r\n[292618.602255] RDX: ffffffff00000001 RSI: 00000","stderr":"\nShell cwd was reset to /home/josie/development/forks/linux","interrupted":false,"isImage":false,"noOutputExpected":false},"sourceToolAssistantUUID":"a2a33906-666b-4cac-af74-20b690e0163d"} {"parentUuid":"3d371e89-8b75-4bc4-a193-1a3417eedb95","isSidechain":false,"userType":"external","cwd":"/home/josie/development/forks/linux","sessionId":"0264110d-7530-4e6f-9308-60ad7d2c7434","version":"2.1.63","gitBranch":"master","slug":"quiet-shimmying-bunny","message":{"model":"claude-opus-4-6","id":"msg_017tFErUWt1jrQJbFyCAmkqj","type":"message","role":"assistant","content":[{"type":"text","text":"Everything works. The MCP server:\n\n- Starts in <1 second (index already built)\n- `search_mail` returns results with FTS5 snippets highlighting matches\n- `get_mail_thread` reconstructs the full 3-message thread from a single message ID\n- All 4 tools are registered and callable\n\nTo use it: **restart Claude Code** (`Ctrl+C` then `claude`). The `kernel-mail` MCP server will auto-start, and you will have `search_mail`, `get_mail`, `get_mail_thread`, and `reindex_mail` tools available in every session."}],"stop_reason":"end_turn","stop_sequence":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":880,"cache_read_input_tokens":137924,"output_tokens":146,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":880,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CYcAZBdsE7BxFztdeaCvh","type":"assistant","uuid":"03b1b0b9-a3b7-451d-8e51-643080efe61a","timestamp":"2026-03-01T10:00:23.497Z"} {"parentUuid":"03b1b0b9-a3b7-451d-8e51-643080efe61a","isSidechain":false,"userType":"external","cwd":"/home/josie/development/forks/linux","sessionId":"0264110d-7530-4e6f-9308-60ad7d2c7434","version":"2.1.63","gitBranch":"master","slug":"quiet-shimmying-bunny","type":"progress","data":{"type":"hook_progress","hookEvent":"Stop","hookName":"Stop","command":"${CLAUDE_PLUGIN_ROOT}/hooks/stop-hook.sh"},"parentToolUseID":"d3d2ac85-12b9-432d-823b-95d99454b036","toolUseID":"d3d2ac85-12b9-432d-823b-95d99454b036