net: ethernet: mtk-star-emac: fix spinlock recursion issues on rx/tx poll

{
  "id": "0d68bc5bc57123ebdbcfd61372e2ede47c0de7233a89f125cebf437c3cdeb9ec",
  "url": "https://osv.dev/vulnerability/CVE-2025-37917",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net: ethernet: mtk-star-emac: fix spinlock recursion issues on rx/tx poll",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net: ethernet: mtk-star-emac: fix spinlock recursion issues on rx/tx poll Use spin_lock_irqsave and spin_unlock_irqrestore instead of spin_lock and spin_unlock in mtk_star_emac driver to avoid spinlock recursion occurrence that can happen when enabling the DMA interrupts again in rx/tx poll. ``` BUG: spinlock recursion on CPU#0, swapper/0/0 lock: 0xffff00000db9cf20, .magic: dead4ead, .owner: swapper/0/0, .owner_cpu: 0 CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.15.0-rc2-next-20250417-00001-gf6a27738686c-dirty #28 PREEMPT Hardware name: MediaTek MT8365 Open Platform EVK (DT) Call trace: show_stack+0x18/0x24 (C) dump_stack_lvl+0x60/0x80 dump_stack+0x18/0x24 spin_dump+0x78/0x88 do_raw_spin_lock+0x11c/0x120 _raw_spin_lock+0x20/0x2c mtk_star_handle_irq+0xc0/0x22c [mtk_star_emac] __handle_irq_event_percpu+0x48/0x140 handle_irq_event+0x4c/0xb0 handle_fasteoi_irq+0xa0/0x1bc handle_irq_desc+0x34/0x58 generic_handle_domain_irq+0x1c/0x28 gic_handle_irq+0x4c/0x120 do_interrupt_handler+0x50/0x84 el1_interrupt+0x34/0x68 el1h_64_irq_handler+0x18/0x24 el1h_64_irq+0x6c/0x70 regmap_mmio_read32le+0xc/0x20 (P) _regmap_bus_reg_read+0x6c/0xac _regmap_read+0x60/0xdc regmap_read+0x4c/0x80 mtk_star_rx_poll+0x2f4/0x39c [mtk_star_emac] __napi_poll+0x38/0x188 net_rx_action+0x164/0x2c0 handle_softirqs+0x100/0x244 __do_softirq+0x14/0x20 ____do_softirq+0x10/0x20 call_on_irq_stack+0x24/0x64 do_softirq_own_stack+0x1c/0x40 __irq_exit_r",
    "evidence": "osv:CVE-2025-37917",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.138",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.90",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.28",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.14.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-37917",
      "aliases": [
        "CVE-2025-37917"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
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              "type": "GIT",
              "events": [
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                },
                {
                  "fixed": "7cb10f17bddc415f30fbc00a4e2b490e0d94c462"
                },
                {
                  "fixed": "8d40bf73fa7f31eac2b0a7c9d85de67df82ee7f3"
                },
                {
                  "fixed": "d886f8d85494d12b2752fd7c6c32162d982d5dd5"
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                {
                  "fixed": "6fe0866014486736cc3ba1c6fd4606d3dbe55c9c"
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              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37917.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.0.0"
                },
                {
                  "fixed": "6.1.138"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.90"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.28"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.13.0"
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                {
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                }
              ]
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37917.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:41.977389793Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-019113.html",
        "https://cert-portal.siemens.com/productcert/html/ssa-457936.html",
        "https://git.kernel.org/stable/c/6fe0866014486736cc3ba1c6fd4606d3dbe55c9c",
        "https://git.kernel.org/stable/c/7cb10f17bddc415f30fbc00a4e2b490e0d94c462",
        "https://git.kernel.org/stable/c/8d40bf73fa7f31eac2b0a7c9d85de67df82ee7f3",
        "https://git.kernel.org/stable/c/94107259f972d2fd896dbbcaa176b3b2451ff9e5",
        "https://git.kernel.org/stable/c/bedd287fdd3142dffad7ae2ac6ef15f4a2ad0629",
        "https://git.kernel.org/stable/c/d886f8d85494d12b2752fd7c6c32162d982d5dd5",
        "https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37917.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-37917",
        "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/2025/37xxx/CVE-2025-37917.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-37917",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 509301,
  "published_at": "2025-05-20T15:21:47.703+00:00"
}