Description
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]
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 < 8c1ad4af160691e157d688ad9619ced2df556aacaffected360aebd85a4c946764f6301d68de2a817fad5159 to < 912e200240b6f9758f0b126e64a61c9227f4ad37affected360aebd85a4c946764f6301d68de2a817fad5159 to < 398170b7fd0e0db2f8096df5206c75e5ff41415aaffected360aebd85a4c946764f6301d68de2a817fad5159 to < 32173edf3fe2d447e14e5e3b299387c6f9602a88affected360aebd85a4c946764f6301d68de2a817fad5159 to < 28aa3cfce12487614219e7667ec84424e1f43227affected360aebd85a4c946764f6301d68de2a817fad5159 to < 1773c19fa55e944cdd2634e2d9e552f87f2d38d5affected360aebd85a4c946764f6301d68de2a817fad5159 to < bbd302c4b79df10197ffa7270ca3aa572eeca33caffected360aebd85a4c946764f6301d68de2a817fad5159 to < 4668619092554e1b95c9a5ac2941ca47ba6d548aaffected
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/8c1ad4af160691e157d688ad9619ced2df556aac ↗
- https://git.kernel.org/stable/c/912e200240b6f9758f0b126e64a61c9227f4ad37 ↗
- https://git.kernel.org/stable/c/398170b7fd0e0db2f8096df5206c75e5ff41415a ↗
- https://git.kernel.org/stable/c/32173edf3fe2d447e14e5e3b299387c6f9602a88 ↗
- https://git.kernel.org/stable/c/28aa3cfce12487614219e7667ec84424e1f43227 ↗
- https://git.kernel.org/stable/c/1773c19fa55e944cdd2634e2d9e552f87f2d38d5 ↗
- https://git.kernel.org/stable/c/bbd302c4b79df10197ffa7270ca3aa572eeca33c ↗
- https://git.kernel.org/stable/c/4668619092554e1b95c9a5ac2941ca47ba6d548a ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html ↗