f2fs: quota: fix to avoid warning in dquot_writeback_dquots()

{
  "id": "c52a25759458304d805d52f1b874e1f070a696354fe93d2fe1f6254f19ed55e9",
  "url": "https://osv.dev/vulnerability/CVE-2025-23132",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "f2fs: quota: fix to avoid warning in dquot_writeback_dquots()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: f2fs: quota: fix to avoid warning in dquot_writeback_dquots() F2FS-fs (dm-59): checkpoint=enable has some unwritten data. ------------[ cut here ]------------ WARNING: CPU: 6 PID: 8013 at fs/quota/dquot.c:691 dquot_writeback_dquots+0x2fc/0x308 pc : dquot_writeback_dquots+0x2fc/0x308 lr : f2fs_quota_sync+0xcc/0x1c4 Call trace: dquot_writeback_dquots+0x2fc/0x308 f2fs_quota_sync+0xcc/0x1c4 f2fs_write_checkpoint+0x3d4/0x9b0 f2fs_issue_checkpoint+0x1bc/0x2c0 f2fs_sync_fs+0x54/0x150 f2fs_do_sync_file+0x2f8/0x814 __f2fs_ioctl+0x1960/0x3244 f2fs_ioctl+0x54/0xe0 __arm64_sys_ioctl+0xa8/0xe4 invoke_syscall+0x58/0x114 checkpoint and f2fs_remount may race as below, resulting triggering warning in dquot_writeback_dquots(). atomic write remount - do_remount - down_write(&sb->s_umount); - f2fs_remount - ioctl - f2fs_do_sync_file - f2fs_sync_fs - f2fs_write_checkpoint - block_operations - locked = down_read_trylock(&sbi->sb->s_umount) : fail to lock due to the write lock was held by remount - up_write(&sb->s_umount); - f2fs_quota_sync - dquot_writeback_dquots - WARN_ON_ONCE(!rwsem_is_locked(&sb->s_umount)) : trigger warning because s_umount lock was unlocked by remount If checkpoint comes from mount/umount/remount/freeze/quotactl, caller of checkpoint has already held s_umount lock, calling dquot_writeback_dquots() in the context should be safe. So let's record task to sbi->umount_lock_holder, so that checkpoint can know whet",
    "evidence": "osv:CVE-2025-23132",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.114",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.14.2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-23132",
      "aliases": [
        "CVE-2025-23132"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "af033b2aa8a874fd5737fafe90d159136527b5b4"
                },
                {
                  "fixed": "9ec535db9da76dafa05c89f8b58a0b1d7dddba1c"
                },
                {
                  "fixed": "d7acf0a6c87aa282c86a36dbaa2f92fda88c5884"
                },
                {
                  "fixed": "eb85c2410d6f581e957cd03a644ff6ddbe592af9"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-23132.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.20.0"
                },
                {
                  "fixed": "6.12.114"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.14.2"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-23132.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:21.433019175Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/9ec535db9da76dafa05c89f8b58a0b1d7dddba1c",
        "https://git.kernel.org/stable/c/d7acf0a6c87aa282c86a36dbaa2f92fda88c5884",
        "https://git.kernel.org/stable/c/eb85c2410d6f581e957cd03a644ff6ddbe592af9",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/23xxx/CVE-2025-23132.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-23132",
        "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/2025/23xxx/CVE-2025-23132.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-23132",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 487799,
  "published_at": "2025-04-16T14:13:13.697+00:00"
}