f2fs: fix kernel crash due to null io->bio

{
  "id": "2ec2b891bf8d3dca465dab55dff6552b263fdc2fc8ec785aa3793163be7063d9",
  "url": "https://osv.dev/vulnerability/CVE-2023-53301",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "f2fs: fix kernel crash due to null io->bio",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: f2fs: fix kernel crash due to null io->bio We should return when io->bio is null before doing anything. Otherwise, panic. BUG: kernel NULL pointer dereference, address: 0000000000000010 RIP: 0010:__submit_merged_write_cond+0x164/0x240 [f2fs] Call Trace: f2fs_submit_merged_write+0x1d/0x30 [f2fs] commit_checkpoint+0x110/0x1e0 [f2fs] f2fs_write_checkpoint+0x9f7/0xf00 [f2fs] ? __pfx_issue_checkpoint_thread+0x10/0x10 [f2fs] __checkpoint_and_complete_reqs+0x84/0x190 [f2fs] ? preempt_count_add+0x82/0xc0 ? __pfx_issue_checkpoint_thread+0x10/0x10 [f2fs] issue_checkpoint_thread+0x4c/0xf0 [f2fs] ? __pfx_autoremove_wake_function+0x10/0x10 kthread+0xff/0x130 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x2c/0x50",
    "evidence": "osv:CVE-2023-53301",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.16",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.2.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2023-53301",
      "aliases": [
        "CVE-2023-53301"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "64bf0eef0171912f7c2f3ea30ee6ad7a2ad0a511"
                },
                {
                  "fixed": "83dbb9a1bd5ef2eea73275906fc50b2fdda39cd5"
                },
                {
                  "fixed": "eb52f13c6093ac761dbeaa459c810fc0253209fc"
                },
                {
                  "fixed": "267c159f9c7bcb7009dae16889b880c5ed8759a8"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53301.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.18.0"
                },
                {
                  "fixed": "6.1.16"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.2.3"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53301.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:42.933553432Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/267c159f9c7bcb7009dae16889b880c5ed8759a8",
        "https://git.kernel.org/stable/c/83dbb9a1bd5ef2eea73275906fc50b2fdda39cd5",
        "https://git.kernel.org/stable/c/eb52f13c6093ac761dbeaa459c810fc0253209fc",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53301.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-53301",
        "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/2023/53xxx/CVE-2023-53301.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-53301",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 510734,
  "published_at": "2025-09-16T08:11:32.344+00:00"
}