{"dataType": "CVE_RECORD", "dataVersion": "5.1", "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": "2025-06-18T11:01:46.233Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-06-18T11:01:46.233Z"}, "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"}]}, {"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"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2022-50045", "lastModified": "2025-06-18T13:47:40.833", "metrics": {}, "published": "2025-06-18T11:15:33.050", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1d9e75c3d8cdf7c96a94cb77450d4ee070279e6a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5db5ce0f1963c6c8275719a80cb65e9c98d32726"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6f75057c21eab12c6ccb7f06f859641a6edfab99"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8d48562a2729742f767b0fdd994d6b2a56a49c63"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/90f195c01a2e8d8da6281791617e21109719c981"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a868f771ee41c97a25a04b8c632a7f06689b307b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ccb0a42d3f40c436295e0fef57ab613ae5b925a4"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: powerpc/pci: Fix get_phb_number() locking", "id": "2373561", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2373561"}, "csaw": false, "cvss3": {"cvss3_base_score": "2.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-413", "details": ["In the Linux kernel, the following vulnerability has been resolved:\npowerpc/pci: Fix get_phb_number() locking\nThe recent change to get_phb_number() causes a DEBUG_ATOMIC_SLEEP\nwarning on some systems:\nBUG: sleeping function called from invalid context at kernel/locking/mutex.c:580\nin_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 1, name: swapper\npreempt_count: 1, expected: 0\nRCU nest depth: 0, expected: 0\n1 lock held by swapper/1:\n#0: c157efb0 (hose_spinlock){+.+.}-{2:2}, at: pcibios_alloc_controller+0x64/0x220\nPreemption disabled at:\n[<00000000>] 0x0\nCPU: 0 PID: 1 Comm: swapper Not tainted 5.19.0-yocto-standard+ #1\nCall 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\nThis is because pcibios_alloc_controller() holds hose_spinlock but\nof_alias_get_id() takes of_mutex which can sleep.\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.\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."], "name": "CVE-2022-50045", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Under investigation", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-06-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50045\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50045\nhttps://lore.kernel.org/linux-cve-announce/2025061844-CVE-2022-50045-0924@gregkh/T"], "threat_severity": "Low"}