Description
In the Linux kernel, the following vulnerability has been resolved: pci/hotplug/pnv_php: Fix hotplug driver crash on Powernv The hotplug driver for powerpc (pci/hotplug/pnv_php.c) causes a kernel crash when we try to hot-unplug/disable the PCIe switch/bridge from the PHB. The crash occurs because although the MSI data structure has been released during disable/hot-unplug path and it has been assigned with NULL, still during unregistration the code was again trying to explicitly disable the MSI which causes the NULL pointer dereference and kernel crash. The patch fixes the check during unregistration path to prevent invoking pci_disable_msi/msix() since its data structure is already freed.
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
49f4b08e61547a5ccd2db551d994c4503efe5666 to < 4eb4085c1346d19d4a05c55246eb93e74e671048affected49f4b08e61547a5ccd2db551d994c4503efe5666 to < c4c681999d385e28f84808bbf3a85ea8e982da55affected49f4b08e61547a5ccd2db551d994c4503efe5666 to < bc1faed19db95abf0933b104910a3fb01b138f59affected49f4b08e61547a5ccd2db551d994c4503efe5666 to < c0d8094dc740cfacf3775bbc6a1c4720459e8de4affected49f4b08e61547a5ccd2db551d994c4503efe5666 to < 438d522227374042b5c8798f8ce83bbe479dca4daffected49f4b08e61547a5ccd2db551d994c4503efe5666 to < b82d4d5c736f4fd2ed224c35f554f50d1953d21eaffected49f4b08e61547a5ccd2db551d994c4503efe5666 to < bfc44075b19740d372f989f21dd03168bfda0689affected49f4b08e61547a5ccd2db551d994c4503efe5666 to < 335e35b748527f0c06ded9eebb65387f60647fdaaffected1fb738a3dc1304250c755e5e31715137c1c44c50affectedbc4c9766324a7e9fda48de58691796430c8511bfaffected4.9.14 to < 4.10affected4.10.2 to < 4.11affected
Linux Linux
Default version status: affected
4.11affected0 to < 4.11unaffected4.19.322 to ≤ 4.19.*unaffected5.4.284 to ≤ 5.4.*unaffected5.10.226 to ≤ 5.10.*unaffected5.15.167 to ≤ 5.15.*unaffected6.1.110 to ≤ 6.1.*unaffected6.6.51 to ≤ 6.6.*unaffected6.10.10 to ≤ 6.10.*unaffected6.11 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/4eb4085c1346d19d4a05c55246eb93e74e671048 ↗
- https://git.kernel.org/stable/c/c4c681999d385e28f84808bbf3a85ea8e982da55 ↗
- https://git.kernel.org/stable/c/bc1faed19db95abf0933b104910a3fb01b138f59 ↗
- https://git.kernel.org/stable/c/c0d8094dc740cfacf3775bbc6a1c4720459e8de4 ↗
- https://git.kernel.org/stable/c/438d522227374042b5c8798f8ce83bbe479dca4d ↗
- https://git.kernel.org/stable/c/b82d4d5c736f4fd2ed224c35f554f50d1953d21e ↗
- https://git.kernel.org/stable/c/bfc44075b19740d372f989f21dd03168bfda0689 ↗
- https://git.kernel.org/stable/c/335e35b748527f0c06ded9eebb65387f60647fda ↗
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html ↗