{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2022-50045",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-06-18T10:57:27.401Z",
        "datePublished": "2025-06-18T11:01:46.233Z",
        "dateUpdated": "2026-05-23T15:23:36.551Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-23T15:23:36.551Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/pci: Fix get_phb_number() locking\n\nThe recent change to get_phb_number() causes a DEBUG_ATOMIC_SLEEP\nwarning on some systems:\n\n  BUG: sleeping function called from invalid context at kernel/locking/mutex.c:580\n  in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 1, name: swapper\n  preempt_count: 1, expected: 0\n  RCU nest depth: 0, expected: 0\n  1 lock held by swapper/1:\n   #0: c157efb0 (hose_spinlock){+.+.}-{2:2}, at: pcibios_alloc_controller+0x64/0x220\n  Preemption disabled at:\n  [<00000000>] 0x0\n  CPU: 0 PID: 1 Comm: swapper Not tainted 5.19.0-yocto-standard+ #1\n  Call Trace:\n  [d101dc90] [c073b264] dump_stack_lvl+0x50/0x8c (unreliable)\n  [d101dcb0] [c0093b70] __might_resched+0x258/0x2a8\n  [d101dcd0] [c0d3e634] __mutex_lock+0x6c/0x6ec\n  [d101dd50] [c0a84174] of_alias_get_id+0x50/0xf4\n  [d101dd80] [c002ec78] pcibios_alloc_controller+0x1b8/0x220\n  [d101ddd0] [c140c9dc] pmac_pci_init+0x198/0x784\n  [d101de50] [c140852c] discover_phbs+0x30/0x4c\n  [d101de60] [c0007fd4] do_one_initcall+0x94/0x344\n  [d101ded0] [c1403b40] kernel_init_freeable+0x1a8/0x22c\n  [d101df10] [c00086e0] kernel_init+0x34/0x160\n  [d101df30] [c001b334] ret_from_kernel_thread+0x5c/0x64\n\nThis is because pcibios_alloc_controller() holds hose_spinlock but\nof_alias_get_id() takes of_mutex which can sleep.\n\nThe hose_spinlock protects the phb_bitmap, and also the hose_list, but\nit doesn't need to be held while get_phb_number() calls the OF routines,\nbecause those are only looking up information in the device tree.\n\nSo fix it by having get_phb_number() take the hose_spinlock itself, only\nwhere required, and then dropping the lock before returning.\npcibios_alloc_controller() then needs to take the lock again before the\nlist_add() but that's safe, the order of the list is not important."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/powerpc/kernel/pci-common.c"
                    ],
                    "versions": [
                        {
                            "version": "a79e4395619c926ea7e828b2023c0fbe2776385b",
                            "lessThan": "6f75057c21eab12c6ccb7f06f859641a6edfab99",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "205826dcac3271ab04fb97d66f1b4f8219723259",
                            "lessThan": "5db5ce0f1963c6c8275719a80cb65e9c98d32726",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3ec50b8a0128359ff4ad4061a75c3322d0ab6ac9",
                            "lessThan": "ccb0a42d3f40c436295e0fef57ab613ae5b925a4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "47a8fe1b154aa6d836582365b1c70684af8597e4",
                            "lessThan": "a868f771ee41c97a25a04b8c632a7f06689b307b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ef0f4eeaba2463a77ac5a4e42c30717deb3c7b62",
                            "lessThan": "1d9e75c3d8cdf7c96a94cb77450d4ee070279e6a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f35c7f506fb96a23a1961c7314c5931ec8bc473e",
                            "lessThan": "90f195c01a2e8d8da6281791617e21109719c981",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0fe1e96fef0a5c53b4c0d1500d356f3906000f81",
                            "lessThan": "8d48562a2729742f767b0fdd994d6b2a56a49c63",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e0274da3ac318296fed503422ccda98ce67e99cb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.18.18",
                            "lessThan": "5.19",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/powerpc/kernel/pci-common.c"
                    ],
                    "versions": [
                        {
                            "version": "5.10.137",
                            "lessThan": "5.10.138",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.61",
                            "lessThan": "5.15.63",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.19.2",
                            "lessThan": "5.19.4",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10.137",
                                    "versionEndExcluding": "5.10.138"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15.61",
                                    "versionEndExcluding": "5.15.63"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19.2",
                                    "versionEndExcluding": "5.19.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.18.18"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/6f75057c21eab12c6ccb7f06f859641a6edfab99"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5db5ce0f1963c6c8275719a80cb65e9c98d32726"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ccb0a42d3f40c436295e0fef57ab613ae5b925a4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a868f771ee41c97a25a04b8c632a7f06689b307b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1d9e75c3d8cdf7c96a94cb77450d4ee070279e6a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/90f195c01a2e8d8da6281791617e21109719c981"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8d48562a2729742f767b0fdd994d6b2a56a49c63"
                }
            ],
            "title": "powerpc/pci: Fix get_phb_number() locking",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}