eventfs: Use list_del_rcu() for SRCU protected list variable

{
  "id": "681e56e88424f3cd0c43405e5346e0ea063afca17a9a3767d4bd7801436662ea",
  "url": "https://osv.dev/vulnerability/CVE-2024-46785",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "eventfs: Use list_del_rcu() for SRCU protected list variable",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: eventfs: Use list_del_rcu() for SRCU protected list variable Chi Zhiling reported: We found a null pointer accessing in tracefs[1], the reason is that the variable 'ei_child' is set to LIST_POISON1, that means the list was removed in eventfs_remove_rec. so when access the ei_child->is_freed, the panic triggered. by the way, the following script can reproduce this panic loop1 (){ while true do echo \"p:kp submit_bio\" > /sys/kernel/debug/tracing/kprobe_events echo \"\" > /sys/kernel/debug/tracing/kprobe_events done } loop2 (){ while true do tree /sys/kernel/debug/tracing/events/kprobes/ done } loop1 & loop2 [1]: [ 1147.959632][T17331] Unable to handle kernel paging request at virtual address dead000000000150 [ 1147.968239][T17331] Mem abort info: [ 1147.971739][T17331] ESR = 0x0000000096000004 [ 1147.976172][T17331] EC = 0x25: DABT (current EL), IL = 32 bits [ 1147.982171][T17331] SET = 0, FnV = 0 [ 1147.985906][T17331] EA = 0, S1PTW = 0 [ 1147.989734][T17331] FSC = 0x04: level 0 translation fault [ 1147.995292][T17331] Data abort info: [ 1147.998858][T17331] ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000 [ 1148.005023][T17331] CM = 0, WnR = 0, TnD = 0, TagAccess = 0 [ 1148.010759][T17331] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [ 1148.016752][T17331] [dead000000000150] address between user and kernel address ranges [ 1148.024571][T17331] Internal error: Oops: 0000000096000004 [#1] SMP [ 1148.030825][T17331] Modu",
    "evidence": "osv:CVE-2024-46785",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.51",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.10.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2024-46785",
      "aliases": [
        "CVE-2024-46785"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                {
                  "fixed": "05e08297c3c298d8ec28e5a5adb55840312dd87e"
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          ],
          "versions": [
            "v6.6.50",
            "v6.6.49",
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            "v6.6.47",
            "v6.6.46",
            "v6.6.45",
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-46785.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "6.6.51"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
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                  "fixed": "6.10.10"
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-46785.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:45.799615404Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/05e08297c3c298d8ec28e5a5adb55840312dd87e",
        "https://git.kernel.org/stable/c/d2603279c7d645bf0d11fa253b23f1ab48fc8d3c",
        "https://git.kernel.org/stable/c/f579d17a86448779f9642ad8baca6e3036a8e2d6",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/46xxx/CVE-2024-46785.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-46785",
        "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/2024/46xxx/CVE-2024-46785.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-46785",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 513559,
  "published_at": "2024-09-18T07:12:41.529+00:00"
}