block: fix uaf for flush rq while iterating tags

{
  "id": "a98c02abe76fd6adc75440fc0def905c235b8ba4490480e459008caf0b08fb4b",
  "url": "https://osv.dev/vulnerability/CVE-2024-53170",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "block: fix uaf for flush rq while iterating tags",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: block: fix uaf for flush rq while iterating tags blk_mq_clear_flush_rq_mapping() is not called during scsi probe, by checking blk_queue_init_done(). However, QUEUE_FLAG_INIT_DONE is cleared in del_gendisk by commit aec89dc5d421 (\"block: keep q_usage_counter in atomic mode after del_gendisk\"), hence for disk like scsi, following blk_mq_destroy_queue() will not clear flush rq from tags->rqs[] as well, cause following uaf that is found by our syzkaller for v6.6: ================================================================== BUG: KASAN: slab-use-after-free in blk_mq_find_and_get_req+0x16e/0x1a0 block/blk-mq-tag.c:261 Read of size 4 at addr ffff88811c969c20 by task kworker/1:2H/224909 CPU: 1 PID: 224909 Comm: kworker/1:2H Not tainted 6.6.0-ga836a5060850 #32 Workqueue: kblockd blk_mq_timeout_work Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x91/0xf0 lib/dump_stack.c:106 print_address_description.constprop.0+0x66/0x300 mm/kasan/report.c:364 print_report+0x3e/0x70 mm/kasan/report.c:475 kasan_report+0xb8/0xf0 mm/kasan/report.c:588 blk_mq_find_and_get_req+0x16e/0x1a0 block/blk-mq-tag.c:261 bt_iter block/blk-mq-tag.c:288 [inline] __sbitmap_for_each_set include/linux/sbitmap.h:295 [inline] sbitmap_for_each_set include/linux/sbitmap.h:316 [inline] bt_for_each+0x455/0x790 block/blk-mq-tag.c:325 blk_mq_queue_tag_busy_iter+0x320/0x740 block/blk-mq-tag.c:534 blk_mq_timeout_work+0x1a3/0x7b0 block/b",
    "evidence": "osv:CVE-2024-53170",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.127",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.74",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.11.11",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2024-53170",
      "aliases": [
        "CVE-2024-53170"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/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": [
                {
                  "introduced": "6cfeadbff3f8905f2854735ebb88e581402c16c4"
                },
                {
                  "fixed": "1921fe7d2836f8be1d321cf430d17e0d4e05301b"
                },
                {
                  "fixed": "1364a29b71c7837770f1902c49e7a6e234d72c92"
                },
                {
                  "fixed": "a0e93b9fefafe97d596f9c98701ae6c3b04b3ff6"
                },
                {
                  "fixed": "61092568f2a9acb0e6e186f03f2e0649a4e86d09"
                },
                {
                  "fixed": "3802f73bd80766d70f319658f334754164075bc3"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-53170.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.19.0"
                },
                {
                  "fixed": "6.1.127"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.74"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.11.11"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.12.0"
                },
                {
                  "fixed": "6.12.2"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-53170.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:45.991692182Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-019113.html",
        "https://cert-portal.siemens.com/productcert/html/ssa-457936.html",
        "https://git.kernel.org/stable/c/1364a29b71c7837770f1902c49e7a6e234d72c92",
        "https://git.kernel.org/stable/c/1921fe7d2836f8be1d321cf430d17e0d4e05301b",
        "https://git.kernel.org/stable/c/3802f73bd80766d70f319658f334754164075bc3",
        "https://git.kernel.org/stable/c/61092568f2a9acb0e6e186f03f2e0649a4e86d09",
        "https://git.kernel.org/stable/c/a0e93b9fefafe97d596f9c98701ae6c3b04b3ff6",
        "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/53xxx/CVE-2024-53170.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-53170",
        "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/2024/53xxx/CVE-2024-53170.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-53170",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 514020,
  "published_at": "2024-12-27T13:49:15.712+00:00"
}