CVE-2021-47073: platform/x86: dell-smbios-wmi: Fix oops on rmmod dell_smbios
First published: Fri Mar 01 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=4.15<4.19.192 | |
| Linux Linux kernel | >=4.20<5.4.122 | |
| Linux Linux kernel | >=5.5<5.10.40 | |
| Linux Linux kernel | >=5.11<5.12.7 | |
| Linux Linux kernel | =5.13-rc1 | |
| Linux Linux kernel | =5.13-rc2 |
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Reference Links
- https://git.kernel.org/stable/c/0cf036a0d325200e6c27b90908e51195bbc557b1
- https://git.kernel.org/stable/c/3a53587423d25c87af4b4126a806a0575104b45e
- https://git.kernel.org/stable/c/6fa78a6b9a3beb676a010dc489c1257f7e432525
- https://git.kernel.org/stable/c/75cfc833da4a2111106d4c134e93e0c7f41e35e7
- https://git.kernel.org/stable/c/8d746ea7c687bab060a2c05a35c449302406cd52
- https://access.redhat.com/security/cve/CVE-2021-47073
- https://lore.kernel.org/linux-cve-announce/2024030142-CVE-2021-47073-704a@gregkh/T/#u
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2267519
- https://access.redhat.com/errata/RHSA-2024:4211
- https://access.redhat.com/errata/RHSA-2024:4352
- https://bugzilla.redhat.com/show_bug.cgi?id=2267518
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