net: ks8851: Handle softirqs at the end of IRQ thread to fix hang

{
  "id": "58a745c7a6c50e72572ed124ec98ff10251065d7eb90bb4059702e2abcd12b62",
  "url": "https://osv.dev/vulnerability/CVE-2024-35971",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net: ks8851: Handle softirqs at the end of IRQ thread to fix hang",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net: ks8851: Handle softirqs at the end of IRQ thread to fix hang The ks8851_irq() thread may call ks8851_rx_pkts() in case there are any packets in the MAC FIFO, which calls netif_rx(). This netif_rx() implementation is guarded by local_bh_disable() and local_bh_enable(). The local_bh_enable() may call do_softirq() to run softirqs in case any are pending. One of the softirqs is net_rx_action, which ultimately reaches the driver .start_xmit callback. If that happens, the system hangs. The entire call chain is below: ks8851_start_xmit_par from netdev_start_xmit netdev_start_xmit from dev_hard_start_xmit dev_hard_start_xmit from sch_direct_xmit sch_direct_xmit from __dev_queue_xmit __dev_queue_xmit from __neigh_update __neigh_update from neigh_update neigh_update from arp_process.constprop.0 arp_process.constprop.0 from __netif_receive_skb_one_core __netif_receive_skb_one_core from process_backlog process_backlog from __napi_poll.constprop.0 __napi_poll.constprop.0 from net_rx_action net_rx_action from __do_softirq __do_softirq from call_with_stack call_with_stack from do_softirq do_softirq from __local_bh_enable_ip __local_bh_enable_ip from netif_rx netif_rx from ks8851_irq ks8851_irq from irq_thread_fn irq_thread_fn from irq_thread irq_thread from kthread kthread from ret_from_fork The hang happens because ks8851_irq() first locks a spinlock in ks8851_par.c ks8851_lock_par() spin_lock_irqsave(&ksp->lock, ...)",
    "evidence": "osv:CVE-2024-35971",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.87",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.28",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.8.7",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2024-35971",
      "aliases": [
        "CVE-2024-35971"
      ],
      "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": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "797047f875b5463719cc70ba213eb691d453c946"
                },
                {
                  "fixed": "492337a4fbd1421b42df684ee9b34be2a2722540"
                },
                {
                  "fixed": "cba376eb036c2c20077b41d47b317d8218fe754f"
                },
                {
                  "fixed": "49d5d70538b6b8f2a3f8f1ac30c1f921d4a0929b"
                },
                {
                  "fixed": "be0384bf599cf1eb8d337517feeb732d71f75a6f"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-35971.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.8.0"
                },
                {
                  "fixed": "6.1.87"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.28"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.8.7"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-35971.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.578528759Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/492337a4fbd1421b42df684ee9b34be2a2722540",
        "https://git.kernel.org/stable/c/49d5d70538b6b8f2a3f8f1ac30c1f921d4a0929b",
        "https://git.kernel.org/stable/c/be0384bf599cf1eb8d337517feeb732d71f75a6f",
        "https://git.kernel.org/stable/c/cba376eb036c2c20077b41d47b317d8218fe754f",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/35xxx/CVE-2024-35971.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-35971",
        "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/2024/35xxx/CVE-2024-35971.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-35971",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 489872,
  "published_at": "2024-05-20T09:41:59.174+00:00"
}