Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: pds_core: fix deadlock between reset thread and remove pci_reset_function() acquires device_lock before performing the reset. pdsc_remove() is called by the PCI core with device_lock already held. If pdsc_pci_reset_thread() is running when pdsc_remove() is called, destroy_workqueue() will block waiting for the work to complete, while the work is blocked waiting for device_lock - deadlock. Use pci_try_reset_function() which uses pci_dev_trylock() internally. This acquires both the device lock and the PCI config access lock without blocking - if either lock is contended, it returns -EAGAIN immediately. This avoids the deadlock while also ensuring proper config space access serialization during the reset. The pci_dev_get/put calls are also removed as they were unnecessary - the driver-owned workqueue is destroyed in pdsc_remove(), guaranteeing the work completes before remove returns. The PCI core holds its reference to pci_dev throughout the entire unbind sequence.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 81665adf25d28a00a986533f1d3a5df76b79cad9 before 90d9f3ef28843e6c35149324b8eefb427a7435c2; affected 81665adf25d28a00a986533f1d3a5df76b79cad9 before 19ef775c91c6bf4bd2b60f6616f4e28b621cdd6a; affected 81665adf25d28a00a986533f1d3a5df76b79cad9 before 54f905821f26d385fba407a920b51f0a752c76dc; affected 81665adf25d28a00a986533f1d3a5df76b79cad9 before ab0eec0ff0a421737a37f510ceab5c6ea59cd05a; affected 38407914d48273d7f8ab765b9243658afe1c3ab6; affected 6.8.7 before 6.9 |
| Linux / Linux | affected 6.9; unaffected 0 before 6.9; unaffected 6.12.101 through 6.12.*; unaffected 6.18.42 through 6.18.*; unaffected 7.1.6 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.