5.5

CVE-2022-50494

thermal: intel_powerclamp: Use get_cpu() instead of smp_processor_id() to avoid crash

In the Linux kernel, the following vulnerability has been resolved:

thermal: intel_powerclamp: Use get_cpu() instead of smp_processor_id() to avoid crash

When CPU 0 is offline and intel_powerclamp is used to inject
idle, it generates kernel BUG:

BUG: using smp_processor_id() in preemptible [00000000] code: bash/15687
caller is debug_smp_processor_id+0x17/0x20
CPU: 4 PID: 15687 Comm: bash Not tainted 5.19.0-rc7+ #57
Call Trace:
<TASK>
dump_stack_lvl+0x49/0x63
dump_stack+0x10/0x16
check_preemption_disabled+0xdd/0xe0
debug_smp_processor_id+0x17/0x20
powerclamp_set_cur_state+0x7f/0xf9 [intel_powerclamp]
...
...

Here CPU 0 is the control CPU by default and changed to the current CPU,
if CPU 0 offlined. This check has to be performed under cpus_read_lock(),
hence the above warning.

Use get_cpu() instead of smp_processor_id() to avoid this BUG.

[ rjw: Subject edits ]
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 3.9 < 4.9.331
Linux ≫ Linux Kernel Version >= 4.10 < 4.14.296
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.262
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.220
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.150
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.75
Linux ≫ Linux Kernel Version >= 5.16 < 5.19.17
Linux ≫ Linux Kernel Version >= 6.0 < 6.0.3
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.15% 0.046
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/3e799e815097febbcb81b472285be824f5d089f9
Patch
https://git.kernel.org/stable/c/0f91f66c568b316b19cb042cf50584467b3bdff4
Patch
https://git.kernel.org/stable/c/6904727db0eb62fb0c2dce1cf331c341d97ee4b7
Patch
https://git.kernel.org/stable/c/5a646c38f648185ee2c62f2a19da3c6f04e27612
Patch
https://git.kernel.org/stable/c/513943bf879d45005213e6f5cfb7d9e9943f589f
Patch
https://git.kernel.org/stable/c/5614908434451aafbf9b24cb5247cf1d21269f76
Patch
https://git.kernel.org/stable/c/6e2a347b304224b2aeb1c0ea000d1cf8a02cc592
Patch
https://git.kernel.org/stable/c/418fae0700e85a498062424f8656435c32cdb200
Patch
https://git.kernel.org/stable/c/68b99e94a4a2db6ba9b31fe0485e057b9354a640
Patch