Description
In the Linux kernel, the following vulnerability has been resolved: PCI: pnv_php: Fix surprise plug detection and recovery The existing PowerNV hotplug code did not handle surprise plug events correctly, leading to a complete failure of the hotplug system after device removal and a required reboot to detect new devices. This comes down to two issues: 1) When a device is surprise removed, often the bridge upstream port will cause a PE freeze on the PHB. If this freeze is not cleared, the MSI interrupts from the bridge hotplug notification logic will not be received by the kernel, stalling all plug events on all slots associated with the PE. 2) When a device is removed from a slot, regardless of surprise or programmatic removal, the associated PHB/PE ls left frozen. If this freeze is not cleared via a fundamental reset, skiboot is unable to clear the freeze and cannot retrain / rescan the slot. This also requires a reboot to clear the freeze and redetect the device in the slot. Issue the appropriate unfreeze and rescan commands on hotplug events, and don't oops on hotplug if pci_bus_to_OF_node() returns NULL. [bhelgaas: tidy comments]
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
360aebd85a4c946764f6301d68de2a817fad5159 to < 6e7b5f922901585b8f11e0d6cda12bda5c59fc8aaffected360aebd85a4c946764f6301d68de2a817fad5159 to < 2ec8ec57bb8ebde3e2a015eff80e5d66e6634fe3affected360aebd85a4c946764f6301d68de2a817fad5159 to < 473999ba937eac9776be791deed7c84a21d7880baffected360aebd85a4c946764f6301d68de2a817fad5159 to < 6e7b24c71e530a6c1d656e73d8a30ee081656844affected360aebd85a4c946764f6301d68de2a817fad5159 to < 48c6935a34981bb56f35be0774ec1f30c6e386f8affected360aebd85a4c946764f6301d68de2a817fad5159 to < 1d2f63680c5719a5da92639e981c6c9a87fcee08affected360aebd85a4c946764f6301d68de2a817fad5159 to < 78d20b8c13075eae3d884c21db7a09a6bbdda5b2affected360aebd85a4c946764f6301d68de2a817fad5159 to < a2a2a6fc2469524caa713036297c542746d148dcaffected
Linux Linux
Default version status: affected
4.9affected0 to < 4.9unaffected5.10.241 to ≤ 5.10.*unaffected5.15.190 to ≤ 5.15.*unaffected6.1.148 to ≤ 6.1.*unaffected6.6.102 to ≤ 6.6.*unaffected6.12.42 to ≤ 6.12.*unaffected6.15.10 to ≤ 6.15.*unaffected6.16.1 to ≤ 6.16.*unaffected6.17 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/6e7b5f922901585b8f11e0d6cda12bda5c59fc8a ↗
- https://git.kernel.org/stable/c/2ec8ec57bb8ebde3e2a015eff80e5d66e6634fe3 ↗
- https://git.kernel.org/stable/c/473999ba937eac9776be791deed7c84a21d7880b ↗
- https://git.kernel.org/stable/c/6e7b24c71e530a6c1d656e73d8a30ee081656844 ↗
- https://git.kernel.org/stable/c/48c6935a34981bb56f35be0774ec1f30c6e386f8 ↗
- https://git.kernel.org/stable/c/1d2f63680c5719a5da92639e981c6c9a87fcee08 ↗
- https://git.kernel.org/stable/c/78d20b8c13075eae3d884c21db7a09a6bbdda5b2 ↗
- https://git.kernel.org/stable/c/a2a2a6fc2469524caa713036297c542746d148dc ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html ↗