xprtrdma: treat all calls not a bcall when bc_serv is NULL

{
  "id": "8e49380e2b81db12c7793150b4b0bfcb763b65445698586cf48a9cd845f873ca",
  "url": "https://osv.dev/vulnerability/CVE-2022-49321",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "xprtrdma: treat all calls not a bcall when bc_serv is NULL",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: xprtrdma: treat all calls not a bcall when bc_serv is NULL When a rdma server returns a fault format reply, nfs v3 client may treats it as a bcall when bc service is not exist. The debug message at rpcrdma_bc_receive_call are, [56579.837169] RPC: rpcrdma_bc_receive_call: callback XID 00000001, length=20 [56579.837174] RPC: rpcrdma_bc_receive_call: 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 After that, rpcrdma_bc_receive_call will meets NULL pointer as, [ 226.057890] BUG: unable to handle kernel NULL pointer dereference at 00000000000000c8 ... [ 226.058704] RIP: 0010:_raw_spin_lock+0xc/0x20 ... [ 226.059732] Call Trace: [ 226.059878] rpcrdma_bc_receive_call+0x138/0x327 [rpcrdma] [ 226.060011] __ib_process_cq+0x89/0x170 [ib_core] [ 226.060092] ib_cq_poll_work+0x26/0x80 [ib_core] [ 226.060257] process_one_work+0x1a7/0x360 [ 226.060367] ? create_worker+0x1a0/0x1a0 [ 226.060440] worker_thread+0x30/0x390 [ 226.060500] ? create_worker+0x1a0/0x1a0 [ 226.060574] kthread+0x116/0x130 [ 226.060661] ? kthread_flush_work_fn+0x10/0x10 [ 226.060724] ret_from_fork+0x35/0x40 ...",
    "evidence": "osv:CVE-2022-49321",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "4.14.283",
            "evidence": "/affected/1/ranges"
          },
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            "value": "4.19.247",
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            "value": "5.4.198",
            "evidence": "/affected/1/ranges"
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            "value": "5.18.4",
            "evidence": "/affected/1/ranges"
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        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2022-49321",
      "aliases": [
        "CVE-2022-49321"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
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      "affected": [
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                  "fixed": "da99331fa62131a38a0947a8204c5208de7b0454"
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            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49321.json"
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            "ecosystem": "Linux"
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      ],
      "modified": "2026-10-28T02:30:44.710738269Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/11270e7ca268e8d61b5d9e5c3a54bd1550642c9c",
        "https://git.kernel.org/stable/c/8dbae5affbdbf524b48000f9d357925bb001e5f4",
        "https://git.kernel.org/stable/c/8e3943c50764dc7c5f25911970c3ff062ec1f18c",
        "https://git.kernel.org/stable/c/90c4f73104016748533a5707ecd15930fbeff402",
        "https://git.kernel.org/stable/c/91784f3d77b73885e1b2e6b59d3cbf0de0a1126a",
        "https://git.kernel.org/stable/c/998d35a2aff4b81a1c784f3aa45cd3afff6814c1",
        "https://git.kernel.org/stable/c/a3fc8051ee061e31db13e2fe011e8e0b71a7f815",
        "https://git.kernel.org/stable/c/da99331fa62131a38a0947a8204c5208de7b0454",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49321.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-49321",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49321.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-49321",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 512601,
  "published_at": "2025-02-26T02:10:46.186+00:00"
}