CVE-2024-36479 (GCVE-0-2024-36479)

Vulnerability from cvelistv5 – Published: 2024-06-24 13:56 – Updated: 2025-11-03 20:37
VLAI?
Title
fpga: bridge: add owner module and take its refcount
Summary
In the Linux kernel, the following vulnerability has been resolved: fpga: bridge: add owner module and take its refcount The current implementation of the fpga bridge assumes that the low-level module registers a driver for the parent device and uses its owner pointer to take the module's refcount. This approach is problematic since it can lead to a null pointer dereference while attempting to get the bridge if the parent device does not have a driver. To address this problem, add a module owner pointer to the fpga_bridge struct and use it to take the module's refcount. Modify the function for registering a bridge to take an additional owner module parameter and rename it to avoid conflicts. Use the old function name for a helper macro that automatically sets the module that registers the bridge as the owner. This ensures compatibility with existing low-level control modules and reduces the chances of registering a bridge without setting the owner. Also, update the documentation to keep it consistent with the new interface for registering an fpga bridge. Other changes: opportunistically move put_device() from __fpga_bridge_get() to fpga_bridge_get() and of_fpga_bridge_get() to improve code clarity since the bridge device is taken in these functions.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 21aeda950c5f84a8351b862816d832120b217a9b , < 18dc8366abb6cadcb77668b1a16434654e355d49 (git)
Affected: 21aeda950c5f84a8351b862816d832120b217a9b , < d7c4081c54a1d4068de9440957303a76f9e5c95b (git)
Affected: 21aeda950c5f84a8351b862816d832120b217a9b , < 6896b6b2e2d9ec4e1b0acb4c1698a75a4b34d125 (git)
Affected: 21aeda950c5f84a8351b862816d832120b217a9b , < 1da11f822042eb6ef4b6064dc048f157a7852529 (git)
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    Linux Linux Affected: 4.10
Unaffected: 0 , < 4.10 (semver)
Unaffected: 6.1.120 , ≤ 6.1.* (semver)
Unaffected: 6.6.33 , ≤ 6.6.* (semver)
Unaffected: 6.9.4 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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