jfs: Fix uaf in dbFreeBits

{
  "id": "c1a2f25ee4c7e60cdca5b3886076e50467be16abb05f0977951c4e104b4455c3",
  "url": "https://osv.dev/vulnerability/CVE-2024-49903",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "jfs: Fix uaf in dbFreeBits",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: jfs: Fix uaf in dbFreeBits [syzbot reported] ================================================================== BUG: KASAN: slab-use-after-free in __mutex_lock_common kernel/locking/mutex.c:587 [inline] BUG: KASAN: slab-use-after-free in __mutex_lock+0xfe/0xd70 kernel/locking/mutex.c:752 Read of size 8 at addr ffff8880229254b0 by task syz-executor357/5216 CPU: 0 UID: 0 PID: 5216 Comm: syz-executor357 Not tainted 6.11.0-rc3-syzkaller-00156-gd7a5aa4b3c00 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 __mutex_lock_common kernel/locking/mutex.c:587 [inline] __mutex_lock+0xfe/0xd70 kernel/locking/mutex.c:752 dbFreeBits+0x7ea/0xd90 fs/jfs/jfs_dmap.c:2390 dbFreeDmap fs/jfs/jfs_dmap.c:2089 [inline] dbFree+0x35b/0x680 fs/jfs/jfs_dmap.c:409 dbDiscardAG+0x8a9/0xa20 fs/jfs/jfs_dmap.c:1650 jfs_ioc_trim+0x433/0x670 fs/jfs/jfs_discard.c:100 jfs_ioctl+0x2d0/0x3e0 fs/jfs/ioctl.c:131 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 Freed by task 5218: kasan_save_stack m",
    "evidence": "osv:CVE-2024-49903",
    "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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          {
            "value": "6.1.113",
            "evidence": "/affected/1/ranges"
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          {
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            "evidence": "/affected/1/ranges"
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          {
            "value": "6.10.14",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.11.3",
            "evidence": "/affected/1/ranges"
          }
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        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2024-49903",
      "aliases": [
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                  "fixed": "e7ae14f7ee76c6ef5a48aebab1a278ad78f42619"
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                  "fixed": "0c238da83f56bb895cab1e5851d034ac45b158d1"
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                  "fixed": "4218b31ecc7af7e191768d32e32ed4386d8f9b76"
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      "modified": "2026-10-28T02:30:52.771719342Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-265688.html",
        "https://cert-portal.siemens.com/productcert/html/ssa-355557.html",
        "https://git.kernel.org/stable/c/0c238da83f56bb895cab1e5851d034ac45b158d1",
        "https://git.kernel.org/stable/c/3126ccde51f51b0648c8cdccaf916e8bd062e972",
        "https://git.kernel.org/stable/c/4218b31ecc7af7e191768d32e32ed4386d8f9b76",
        "https://git.kernel.org/stable/c/4ac58f7734937f3249da734ede946dfb3b1af5e4",
        "https://git.kernel.org/stable/c/95accb7183badca387f7a8d19a2475cf3089f148",
        "https://git.kernel.org/stable/c/a9603a6f75df2fd8125cd208c98cfaa0fe3f7505",
        "https://git.kernel.org/stable/c/d6c1b3599b2feb5c7291f5ac3a36e5fa7cedb234",
        "https://git.kernel.org/stable/c/e7ae14f7ee76c6ef5a48aebab1a278ad78f42619",
        "https://git.kernel.org/stable/c/fd026b6b6758d5569705c02540b40f3bbf822b9a",
        "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html",
        "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/49xxx/CVE-2024-49903.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-49903",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
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        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/49xxx/CVE-2024-49903.json"
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    "related_cves": [
      {
        "value": "CVE-2024-49903",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 521515,
  "published_at": "2024-10-21T18:01:34.603+00:00"
}