CVE-2022-50012
powerpc/64: Init jump labels before parse_early_param()
In the Linux kernel, the following vulnerability has been resolved: powerpc/64: Init jump labels before parse_early_param() On 64-bit, calling jump_label_init() in setup_feature_keys() is too late because static keys may be used in subroutines of parse_early_param() which is again subroutine of early_init_devtree(). For example booting with "threadirqs": static_key_enable_cpuslocked(): static key '0xc000000002953260' used before call to jump_label_init() WARNING: CPU: 0 PID: 0 at kernel/jump_label.c:166 static_key_enable_cpuslocked+0xfc/0x120 ... NIP static_key_enable_cpuslocked+0xfc/0x120 LR static_key_enable_cpuslocked+0xf8/0x120 Call Trace: static_key_enable_cpuslocked+0xf8/0x120 (unreliable) static_key_enable+0x30/0x50 setup_forced_irqthreads+0x28/0x40 do_early_param+0xa0/0x108 parse_args+0x290/0x4e0 parse_early_options+0x48/0x5c parse_early_param+0x58/0x84 early_init_devtree+0xd4/0x518 early_setup+0xb4/0x214 So call jump_label_init() just before parse_early_param() in early_init_devtree(). [mpe: Add call trace to change log and minor wording edits.]
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ 91cc470e797828d779cd4c1efbe8519bcb358bae; < e3c9e9452a8ea12d335b1e59b2c72e1b99c699b8 (affected, git) ≥ 91cc470e797828d779cd4c1efbe8519bcb358bae; < 8f9357313cdcadb0a311b44c29d4eaccc7fa632f (affected, git) ≥ 91cc470e797828d779cd4c1efbe8519bcb358bae; < ca829e05d3d4f728810cc5e4b468d9ebc7745eb3 (affected, git) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
5.15 (affected) ≥ 0; < 5.15 (unaffected, semver) ≥ 5.15.63; ≤ 5.15.* (unaffected, semver) ≥ 5.19.4; ≤ 5.19.* (unaffected, semver) ≥ 6.0; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
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