platform/x86: dell-smbios-wmi: Fix oops on rmmod dell_smbios
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: platform/x86: dell-smbios-wmi: Fix oops on rmmod dell_smbios init_dell_smbios_wmi() only registers the dell_smbios_wmi_driver on systems where the Dell WMI interface is supported. While exit_dell_smbios_wmi() unregisters it unconditionally, this leads to the following oops: [ 175.722921] ------------[ cut here ]------------ [ 175.722925] Unexpected driver unregister! [ 175.722939] WARNING: CPU: 1 PID: 3630 at drivers/base/driver.c:194 driver_unregister+0x38/0x40 ... [ 175.723089] Call Trace: [ 175.723094] cleanup_module+0x5/0xedd [dell_smbios] ... [ 175.723148] ---[ end trace 064c34e1ad49509d ]--- Make the unregister happen on the same condition the register happens to fix this.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://git.kernel.org/stable/c/75cfc833da4a2111106d4c134e93e0c7f41e35e7
- https://git.kernel.org/stable/c/6fa78a6b9a3beb676a010dc489c1257f7e432525
- https://git.kernel.org/stable/c/0cf036a0d325200e6c27b90908e51195bbc557b1
- https://git.kernel.org/stable/c/8d746ea7c687bab060a2c05a35c449302406cd52
- https://git.kernel.org/stable/c/3a53587423d25c87af4b4126a806a0575104b45e
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