{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2024-26899",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: fix deadlock between bd_link_disk_holder and partition scan\n\n'open_mutex' of gendisk is used to protect open/close block devices. But\nin bd_link_disk_holder(), it is used to protect the creation of symlink\nbetween holding disk and slave bdev, which introduces some issues.\n\nWhen bd_link_disk_holder() is called, the driver is usually in the process\nof initialization/modification and may suspend submitting io. At this\ntime, any io hold 'open_mutex', such as scanning partitions, can cause\ndeadlocks. For example, in raid:\n\nT1                              T2\nbdev_open_by_dev\n lock open_mutex [1]\n ...\n  efi_partition\n  ...\n   md_submit_bio\n\t\t\t\tmd_ioctl mddev_syspend\n\t\t\t\t  -> suspend all io\n\t\t\t\t md_add_new_disk\n\t\t\t\t  bind_rdev_to_array\n\t\t\t\t   bd_link_disk_holder\n\t\t\t\t    try lock open_mutex [2]\n    md_handle_request\n     -> wait mddev_resume\n\nT1 scan partition, T2 add a new device to raid. T1 waits for T2 to resume\nmddev, but T2 waits for open_mutex held by T1. Deadlock occurs.\n\nFix it by introducing a local mutex 'blk_holder_mutex' to replace\n'open_mutex'."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Linux",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Linux",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "1b0a2d950ee2",
                                            "version_value": "1e5c5b0abaee"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "6.7",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "6.7",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.7.11",
                                                        "lessThanOrEqual": "6.7.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.8.2",
                                                        "lessThanOrEqual": "6.8.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.9",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/1e5c5b0abaee7b62a10b9707a62083b71ad21f62",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/1e5c5b0abaee7b62a10b9707a62083b71ad21f62"
            },
            {
                "url": "https://git.kernel.org/stable/c/5a87c1f7993bc8ac358a3766bac5dc7126e01e98",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/5a87c1f7993bc8ac358a3766bac5dc7126e01e98"
            },
            {
                "url": "https://git.kernel.org/stable/c/03f12122b20b6e6028e9ed69030a49f9cffcbb75",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/03f12122b20b6e6028e9ed69030a49f9cffcbb75"
            }
        ]
    },
    "generator": {
        "engine": "bippy-a5840b7849dd"
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}