scsi: ufs: core: bsg: Fix crash when arpmb command fails

{
  "id": "ab63889f87db436127c91f2de1385a16e55d475b4a17665745ffaa7462a0203b",
  "url": "https://osv.dev/vulnerability/CVE-2025-21873",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "scsi: ufs: core: bsg: Fix crash when arpmb command fails",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: core: bsg: Fix crash when arpmb command fails If the device doesn't support arpmb we'll crash due to copying user data in bsg_transport_sg_io_fn(). In the case where ufs_bsg_exec_advanced_rpmb_req() returns an error, do not set the job's reply_len. Memory crash backtrace: 3,1290,531166405,-;ufshcd 0000:00:12.5: ARPMB OP failed: error code -22 4,1308,531166555,-;Call Trace: 4,1309,531166559,-; 4,1310,531166565,-; ? show_regs+0x6d/0x80 4,1311,531166575,-; ? die+0x37/0xa0 4,1312,531166583,-; ? do_trap+0xd4/0xf0 4,1313,531166593,-; ? do_error_trap+0x71/0xb0 4,1314,531166601,-; ? usercopy_abort+0x6c/0x80 4,1315,531166610,-; ? exc_invalid_op+0x52/0x80 4,1316,531166622,-; ? usercopy_abort+0x6c/0x80 4,1317,531166630,-; ? asm_exc_invalid_op+0x1b/0x20 4,1318,531166643,-; ? usercopy_abort+0x6c/0x80 4,1319,531166652,-; __check_heap_object+0xe3/0x120 4,1320,531166661,-; check_heap_object+0x185/0x1d0 4,1321,531166670,-; __check_object_size.part.0+0x72/0x150 4,1322,531166679,-; __check_object_size+0x23/0x30 4,1323,531166688,-; bsg_transport_sg_io_fn+0x314/0x3b0",
    "evidence": "osv:CVE-2025-21873",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.81",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.18",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.13.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-21873",
      "aliases": [
        "CVE-2025-21873"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "6ff265fc5ef660499e0edc4641647e99eed3f519"
                },
                {
                  "fixed": "32fb5ec825f6f76bc28902181c65429a904a07fe"
                },
                {
                  "fixed": "59455f968c1004ed897ba873237657745d81ce0f"
                },
                {
                  "fixed": "7e3c96ff5c5f3206984ed077b2aa8c9b7c4e0327"
                },
                {
                  "fixed": "f27a95845b01e86d67c8b014b4f41bd3327daa63"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21873.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.3.0"
                },
                {
                  "fixed": "6.6.81"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.18"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.13.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21873.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.975468846Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/32fb5ec825f6f76bc28902181c65429a904a07fe",
        "https://git.kernel.org/stable/c/59455f968c1004ed897ba873237657745d81ce0f",
        "https://git.kernel.org/stable/c/7e3c96ff5c5f3206984ed077b2aa8c9b7c4e0327",
        "https://git.kernel.org/stable/c/f27a95845b01e86d67c8b014b4f41bd3327daa63",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21873.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-21873",
        "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/2025/21xxx/CVE-2025-21873.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-21873",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 491292,
  "published_at": "2025-03-27T14:57:04.835+00:00"
}