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.
References
Configurations
Configuration 1 (hide)
|
History
03 Feb 2025, 15:53
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/18dc8366abb6cadcb77668b1a16434654e355d49 - Patch | |
| References | () https://git.kernel.org/stable/c/1da11f822042eb6ef4b6064dc048f157a7852529 - Patch | |
| References | () https://git.kernel.org/stable/c/6896b6b2e2d9ec4e1b0acb4c1698a75a4b34d125 - Patch | |
| References | () https://git.kernel.org/stable/c/d7c4081c54a1d4068de9440957303a76f9e5c95b - Patch | |
| CWE | CWE-476 | |
| First Time |
Linux linux Kernel
Linux |
|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
14 Dec 2024, 21:15
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
Information
Published : 2024-06-24 14:15
Updated : 2025-02-03 15:53
NVD link : CVE-2024-36479
Mitre link : CVE-2024-36479
CVE.ORG link : CVE-2024-36479
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference