PCI: pnv_php: Clean up allocated IRQs on unplug

{
  "id": "ba033c2e61f4beb8b480d95dd482871a12dfe66199246b4ac927c2df497729ca",
  "url": "https://osv.dev/vulnerability/CVE-2025-38624",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "PCI: pnv_php: Clean up allocated IRQs on unplug",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: PCI: pnv_php: Clean up allocated IRQs on unplug When the root of a nested PCIe bridge configuration is unplugged, the pnv_php driver leaked the allocated IRQ resources for the child bridges' hotplug event notifications, resulting in a panic. Fix this by walking all child buses and deallocating all its IRQ resources before calling pci_hp_remove_devices(). Also modify the lifetime of the workqueue at struct pnv_php_slot::wq so that it is only destroyed in pnv_php_free_slot(), instead of pnv_php_disable_irq(). This is required since pnv_php_disable_irq() will now be called by workers triggered by hot unplug interrupts, so the workqueue needs to stay allocated. The abridged kernel panic that occurs without this patch is as follows: WARNING: CPU: 0 PID: 687 at kernel/irq/msi.c:292 msi_device_data_release+0x6c/0x9c CPU: 0 UID: 0 PID: 687 Comm: bash Not tainted 6.14.0-rc5+ #2 Call Trace: msi_device_data_release+0x34/0x9c (unreliable) release_nodes+0x64/0x13c devres_release_all+0xc0/0x140 device_del+0x2d4/0x46c pci_destroy_dev+0x5c/0x194 pci_hp_remove_devices+0x90/0x128 pci_hp_remove_devices+0x44/0x128 pnv_php_disable_slot+0x54/0xd4 power_write_file+0xf8/0x18c pci_slot_attr_store+0x40/0x5c sysfs_kf_write+0x64/0x78 kernfs_fop_write_iter+0x1b0/0x290 vfs_write+0x3bc/0x50c ksys_write+0x84/0x140 system_call_exception+0x124/0x230 system_call_vectored_common+0x15c/0x2ec [bhelgaas: tidy comments]",
    "evidence": "osv:CVE-2025-38624",
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    "severity": "unknown",
    "structured": {
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      "modified": "2026-10-28T02:30:28.555223507Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1773c19fa55e944cdd2634e2d9e552f87f2d38d5",
        "https://git.kernel.org/stable/c/28aa3cfce12487614219e7667ec84424e1f43227",
        "https://git.kernel.org/stable/c/32173edf3fe2d447e14e5e3b299387c6f9602a88",
        "https://git.kernel.org/stable/c/398170b7fd0e0db2f8096df5206c75e5ff41415a",
        "https://git.kernel.org/stable/c/4668619092554e1b95c9a5ac2941ca47ba6d548a",
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        "https://git.kernel.org/stable/c/bbd302c4b79df10197ffa7270ca3aa572eeca33c",
        "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38624.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-38624",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38624.json"
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    "related_cves": [
      {
        "value": "CVE-2025-38624",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 495039,
  "published_at": "2025-08-22T16:00:32.924+00:00"
}