s390/ap: Fix crash in AP internal function modify_bitmap()

{
  "id": "0862b6d11c6a6fa0835a1153f047c702ef3bdc8f1beaf24386ab5c9ad262641c",
  "url": "https://osv.dev/vulnerability/CVE-2024-38661",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "s390/ap: Fix crash in AP internal function modify_bitmap()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: s390/ap: Fix crash in AP internal function modify_bitmap() A system crash like this Failing address: 200000cb7df6f000 TEID: 200000cb7df6f403 Fault in home space mode while using kernel ASCE. AS:00000002d71bc007 R3:00000003fe5b8007 S:000000011a446000 P:000000015660c13d Oops: 0038 ilc:3 [#1] PREEMPT SMP Modules linked in: mlx5_ib ... CPU: 8 PID: 7556 Comm: bash Not tainted 6.9.0-rc7 #8 Hardware name: IBM 3931 A01 704 (LPAR) Krnl PSW : 0704e00180000000 0000014b75e7b606 (ap_parse_bitmap_str+0x10e/0x1f8) R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 RI:0 EA:3 Krnl GPRS: 0000000000000001 ffffffffffffffc0 0000000000000001 00000048f96b75d3 000000cb00000100 ffffffffffffffff ffffffffffffffff 000000cb7df6fce0 000000cb7df6fce0 00000000ffffffff 000000000000002b 00000048ffffffff 000003ff9b2dbc80 200000cb7df6fcd8 0000014bffffffc0 000000cb7df6fbc8 Krnl Code: 0000014b75e7b5fc: a7840047 brc 8,0000014b75e7b68a 0000014b75e7b600: 18b2 lr %r11,%r2 #0000014b75e7b602: a7f4000a brc 15,0000014b75e7b616 >0000014b75e7b606: eb22d00000e6 laog %r2,%r2,0(%r13) 0000014b75e7b60c: a7680001 lhi %r6,1 0000014b75e7b610: 187b lr %r7,%r11 0000014b75e7b612: 84960021 brxh %r9,%r6,0000014b75e7b654 0000014b75e7b616: 18e9 lr %r14,%r9 Call Trace: [<0000014b75e7b606>] ap_parse_bitmap_str+0x10e/0x1f8 ([<0000014b75e7b5dc>] ap_parse_bitmap_str+0xe4/0x1f8) [<0000014b75e7b758>] apmask_store+0x68/0x140 [<0000014b75679196>] kernfs_fop_write_iter+0x14e/0x1e8",
    "evidence": "osv:CVE-2024-38661",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "evidence": "/affected/1/ranges"
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            "evidence": "/affected/1/ranges"
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            "evidence": "/affected/1/ranges"
          },
          {
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            "evidence": "/affected/1/ranges"
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          {
            "value": "6.1.94",
            "evidence": "/affected/1/ranges"
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          {
            "value": "6.6.34",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.9.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2024-38661",
      "aliases": [
        "CVE-2024-38661"
      ],
      "affected": [
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                {
                  "fixed": "7360cef95aa1ea2b5efb7b5e2ed32e941664e1f0"
                },
                {
                  "fixed": "67011123453b91ec03671d40712fa213e94a01b9"
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                {
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                {
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            "ecosystem": "Linux"
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      ],
      "modified": "2026-10-28T02:30:24.728918493Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2062e3f1f2374102f8014d7ca286b9aa527bd558",
        "https://git.kernel.org/stable/c/4c0bfb4e867c1ec6616a5049bd3618021e127056",
        "https://git.kernel.org/stable/c/67011123453b91ec03671d40712fa213e94a01b9",
        "https://git.kernel.org/stable/c/7360cef95aa1ea2b5efb7b5e2ed32e941664e1f0",
        "https://git.kernel.org/stable/c/7c72af16abf2ec7520407098360bbba312289e05",
        "https://git.kernel.org/stable/c/7dabe54a016defe11bb2a278cd9f1ff6db3feba6",
        "https://git.kernel.org/stable/c/8c5f5911c1b13170d3404eb992c6a0deaa8d81ad",
        "https://git.kernel.org/stable/c/d4f9d5a99a3fd1b1c691b7a1a6f8f3f25f4116c9",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/38xxx/CVE-2024-38661.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-38661",
        "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/2024/38xxx/CVE-2024-38661.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-38661",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 490838,
  "published_at": "2024-06-25T14:22:38.224+00:00"
}