CVE-2021-47073

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> platform/x86: dell-smbios-wmi: Fix oops on rmmod dell_smbios<br /> <br /> init_dell_smbios_wmi() only registers the dell_smbios_wmi_driver on systems<br /> where the Dell WMI interface is supported. While exit_dell_smbios_wmi()<br /> unregisters it unconditionally, this leads to the following oops:<br /> <br /> [ 175.722921] ------------[ cut here ]------------<br /> [ 175.722925] Unexpected driver unregister!<br /> [ 175.722939] WARNING: CPU: 1 PID: 3630 at drivers/base/driver.c:194 driver_unregister+0x38/0x40<br /> ...<br /> [ 175.723089] Call Trace:<br /> [ 175.723094] cleanup_module+0x5/0xedd [dell_smbios]<br /> ...<br /> [ 175.723148] ---[ end trace 064c34e1ad49509d ]---<br /> <br /> Make the unregister happen on the same condition the register happens<br /> to fix this.