CVE-2021-47073

platform/x86: dell-smbios-wmi: Fix oops on rmmod dell_smbios

State: Published
Severity: Not scored
Published: Mar 1, 2024
Updated: May 11, 2026
Reserved: Feb 29, 2024

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	1a258e670434f404a4500b65ba1afea2c2b29bba to before 75cfc833da4a2111106d4c134e93e0c7f41e35e7Affected 1a258e670434f404a4500b65ba1afea2c2b29bba to before 6fa78a6b9a3beb676a010dc489c1257f7e432525Affected 1a258e670434f404a4500b65ba1afea2c2b29bba to before 0cf036a0d325200e6c27b90908e51195bbc557b1Affected 1a258e670434f404a4500b65ba1afea2c2b29bba to before 8d746ea7c687bab060a2c05a35c449302406cd52Affected 1a258e670434f404a4500b65ba1afea2c2b29bba to before 3a53587423d25c87af4b4126a806a0575104b45eAffected
LinuxLinux	4.15Affected before 4.15Not affected 4.19.192 through 4.19.Not affected 5.4.122 through 5.4.Not affected 5.10.40 through 5.10.Not affected 5.12.7 through 5.12.Not affected 5.13 and laterNot affected

Product

Versions

LinuxLinux

1a258e670434f404a4500b65ba1afea2c2b29bba to before 75cfc833da4a2111106d4c134e93e0c7f41e35e7Affected
1a258e670434f404a4500b65ba1afea2c2b29bba to before 6fa78a6b9a3beb676a010dc489c1257f7e432525Affected
1a258e670434f404a4500b65ba1afea2c2b29bba to before 0cf036a0d325200e6c27b90908e51195bbc557b1Affected
1a258e670434f404a4500b65ba1afea2c2b29bba to before 8d746ea7c687bab060a2c05a35c449302406cd52Affected
1a258e670434f404a4500b65ba1afea2c2b29bba to before 3a53587423d25c87af4b4126a806a0575104b45eAffected

LinuxLinux

4.15Affected
before 4.15Not affected
4.19.192 through 4.19.*Not affected
5.4.122 through 5.4.*Not affected
5.10.40 through 5.10.*Not affected
5.12.7 through 5.12.*Not affected
5.13 and laterNot affected

References

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