CVE-2022-50473
Description
In the Linux kernel, the following vulnerability has been resolved: cpufreq: Init completion before kobject_init_and_add() In cpufreq_policy_alloc(), it will call uninitialed completion in cpufreq_sysfs_release() when kobject_init_and_add() fails. And that will cause a crash such as the following page fault in complete: BUG: unable to handle page fault for address: fffffffffffffff8 [..] RIP: 0010:complete+0x98/0x1f0 [..] Call Trace: kobject_put+0x1be/0x4c0 cpufreq_online.cold+0xee/0x1fd cpufreq_add_dev+0x183/0x1e0 subsys_interface_register+0x3f5/0x4e0 cpufreq_register_driver+0x3b7/0x670 acpi_cpufreq_init+0x56c/0x1000 [acpi_cpufreq] do_one_initcall+0x13d/0x780 do_init_module+0x1c3/0x630 load_module+0x6e67/0x73b0 __do_sys_finit_module+0x181/0x240 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd
How to fix
- linux linux_kernel5.4.229, 5.10.163, 5.15.87, 6.0.18, 6.1.4 or later
- git.kernel.org/stable/c/3cdd91a9163248935720927531066b74f57aa43b
- git.kernel.org/stable/c/5c51054896bcce1d33d39fead2af73fec24f40b6
- git.kernel.org/stable/c/8fb4c98f20dfca1237de2e3dfdbe78d156784fd3
- git.kernel.org/stable/c/d88540acfc7a17079021d866de914112c396edb1
- git.kernel.org/stable/c/e379b88a8f8cffc99b318e028705ed9e3da0e1e0
- git.kernel.org/stable/c/e7c0c943ed675b66d4bbb16c51c6a3bb58da047e
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.1.6 ≤ v < 5.4.229, 5.5 ≤ v < 5.10.163, 5.11 ≤ v < 5.15.87, 5.16 ≤ v < 6.0.18, 6.1 ≤ v < 6.1.4 | 5.4.229, 5.10.163, 5.15.87, 6.0.18, 6.1.4 |
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