In the Linux kernel, the following vulnerability has been resolved:
s390/pci: Fix potential double remove of hotplug slot
In commit 6ee600bfbe0f ("s390/pci: remove hotplug slot when releasing the
device") the zpci_exit_slot() was moved from zpci_device_reserved() to
zpci_release_device() with the intention of keeping the hotplug slot
around until the device is actually removed.
Now zpci_release_device() is only called once all references are
dropped. Since the zPCI subsystem only drops its reference once the
device is in the reserved state it follows that zpci_release_device()
must only deal with devices in the reserved state. Despite that it
contains code to tear down from both configured and standby state. For
the standby case this already includes the removal of the hotplug slot
so would cause a double removal if a device was ever removed in
either configured or standby state.
Instead of causing a potential double removal in a case that should
never happen explicitly WARN_ON() if a device in non-reserved state is
released and get rid of the dead code cases.
Metrics
Affected Vendors & Products
References
History
Sat, 12 Jul 2025 13:45:00 +0000
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Mon, 30 Dec 2024 01:30:00 +0000
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Sat, 28 Dec 2024 10:00:00 +0000
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Description | In the Linux kernel, the following vulnerability has been resolved: s390/pci: Fix potential double remove of hotplug slot In commit 6ee600bfbe0f ("s390/pci: remove hotplug slot when releasing the device") the zpci_exit_slot() was moved from zpci_device_reserved() to zpci_release_device() with the intention of keeping the hotplug slot around until the device is actually removed. Now zpci_release_device() is only called once all references are dropped. Since the zPCI subsystem only drops its reference once the device is in the reserved state it follows that zpci_release_device() must only deal with devices in the reserved state. Despite that it contains code to tear down from both configured and standby state. For the standby case this already includes the removal of the hotplug slot so would cause a double removal if a device was ever removed in either configured or standby state. Instead of causing a potential double removal in a case that should never happen explicitly WARN_ON() if a device in non-reserved state is released and get rid of the dead code cases. | |
Title | s390/pci: Fix potential double remove of hotplug slot | |
References |
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Status: PUBLISHED
Assigner: Linux
Published: 2024-12-28T09:46:22.034Z
Updated: 2025-05-04T10:02:45.480Z
Reserved: 2024-12-27T15:00:39.851Z
Link: CVE-2024-56699

No data.

Status : Received
Published: 2024-12-28T10:15:17.060
Modified: 2024-12-28T10:15:17.060
Link: CVE-2024-56699
