net: flow_dissector: use DEBUG_NET_WARN_ON_ONCE

{
  "id": "3d11d62eb6b052ebfb2f8c17cea339ec4db8da9cb4db745378f91b4579cc8ba7",
  "url": "https://osv.dev/vulnerability/CVE-2024-42321",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net: flow_dissector: use DEBUG_NET_WARN_ON_ONCE",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net: flow_dissector: use DEBUG_NET_WARN_ON_ONCE The following splat is easy to reproduce upstream as well as in -stable kernels. Florian Westphal provided the following commit: d1dab4f71d37 (\"net: add and use __skb_get_hash_symmetric_net\") but this complementary fix has been also suggested by Willem de Bruijn and it can be easily backported to -stable kernel which consists in using DEBUG_NET_WARN_ON_ONCE instead to silence the following splat given __skb_get_hash() is used by the nftables tracing infrastructure to to identify packets in traces. [69133.561393] ------------[ cut here ]------------ [69133.561404] WARNING: CPU: 0 PID: 43576 at net/core/flow_dissector.c:1104 __skb_flow_dissect+0x134f/ [...] [69133.561944] CPU: 0 PID: 43576 Comm: socat Not tainted 6.10.0-rc7+ #379 [69133.561959] RIP: 0010:__skb_flow_dissect+0x134f/0x2ad0 [69133.561970] Code: 83 f9 04 0f 84 b3 00 00 00 45 85 c9 0f 84 aa 00 00 00 41 83 f9 02 0f 84 81 fc ff ff 44 0f b7 b4 24 80 00 00 00 e9 8b f9 ff ff <0f> 0b e9 20 f3 ff ff 41 f6 c6 20 0f 84 e4 ef ff ff 48 8d 7b 12 e8 [69133.561979] RSP: 0018:ffffc90000006fc0 EFLAGS: 00010246 [69133.561988] RAX: 0000000000000000 RBX: ffffffff82f33e20 RCX: ffffffff81ab7e19 [69133.561994] RDX: dffffc0000000000 RSI: ffffc90000007388 RDI: ffff888103a1b418 [69133.562001] RBP: ffffc90000007310 R08: 0000000000000000 R09: 0000000000000000 [69133.562007] R10: ffffc90000007388 R11: ffffffff810cface R12: ffff888",
    "evidence": "osv:CVE-2024-42321",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.103",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.44",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.10.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2024-42321",
      "aliases": [
        "CVE-2024-42321"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "9b52e3f267a6835efd50ed9002d530666d16a411"
                },
                {
                  "fixed": "eb03d9826aa646577342a952d658d4598381c035"
                },
                {
                  "fixed": "4afbac11f2f629d1e62817c4e210bdfaa7521107"
                },
                {
                  "fixed": "c5d21aabf1b31a79f228508af33aee83456bc1b0"
                },
                {
                  "fixed": "120f1c857a73e52132e473dee89b340440cb692b"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-42321.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.2.0"
                },
                {
                  "fixed": "6.1.103"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.44"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.10.3"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-42321.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.317215401Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/120f1c857a73e52132e473dee89b340440cb692b",
        "https://git.kernel.org/stable/c/4afbac11f2f629d1e62817c4e210bdfaa7521107",
        "https://git.kernel.org/stable/c/c5d21aabf1b31a79f228508af33aee83456bc1b0",
        "https://git.kernel.org/stable/c/eb03d9826aa646577342a952d658d4598381c035",
        "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/42xxx/CVE-2024-42321.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-42321",
        "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/2024/42xxx/CVE-2024-42321.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-42321",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 518657,
  "published_at": "2024-08-17T09:09:33.505+00:00"
}