Description
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 ]
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
d6d71ee4a14ae602db343ec48c491851d7ec5267 to < 3e799e815097febbcb81b472285be824f5d089f9affectedd6d71ee4a14ae602db343ec48c491851d7ec5267 to < 0f91f66c568b316b19cb042cf50584467b3bdff4affectedd6d71ee4a14ae602db343ec48c491851d7ec5267 to < 6904727db0eb62fb0c2dce1cf331c341d97ee4b7affectedd6d71ee4a14ae602db343ec48c491851d7ec5267 to < 5a646c38f648185ee2c62f2a19da3c6f04e27612affectedd6d71ee4a14ae602db343ec48c491851d7ec5267 to < 513943bf879d45005213e6f5cfb7d9e9943f589faffectedd6d71ee4a14ae602db343ec48c491851d7ec5267 to < 5614908434451aafbf9b24cb5247cf1d21269f76affectedd6d71ee4a14ae602db343ec48c491851d7ec5267 to < 6e2a347b304224b2aeb1c0ea000d1cf8a02cc592affectedd6d71ee4a14ae602db343ec48c491851d7ec5267 to < 418fae0700e85a498062424f8656435c32cdb200affectedd6d71ee4a14ae602db343ec48c491851d7ec5267 to < 68b99e94a4a2db6ba9b31fe0485e057b9354a640affected
Linux Linux
Default version status: affected
3.9affected0 to < 3.9unaffected4.9.331 to ≤ 4.9.*unaffected4.14.296 to ≤ 4.14.*unaffected4.19.262 to ≤ 4.19.*unaffected5.4.220 to ≤ 5.4.*unaffected5.10.150 to ≤ 5.10.*unaffected5.15.75 to ≤ 5.15.*unaffected5.19.17 to ≤ 5.19.*unaffected6.0.3 to ≤ 6.0.*unaffected6.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/3e799e815097febbcb81b472285be824f5d089f9 ↗
- https://git.kernel.org/stable/c/0f91f66c568b316b19cb042cf50584467b3bdff4 ↗
- https://git.kernel.org/stable/c/6904727db0eb62fb0c2dce1cf331c341d97ee4b7 ↗
- https://git.kernel.org/stable/c/5a646c38f648185ee2c62f2a19da3c6f04e27612 ↗
- https://git.kernel.org/stable/c/513943bf879d45005213e6f5cfb7d9e9943f589f ↗
- https://git.kernel.org/stable/c/5614908434451aafbf9b24cb5247cf1d21269f76 ↗
- https://git.kernel.org/stable/c/6e2a347b304224b2aeb1c0ea000d1cf8a02cc592 ↗
- https://git.kernel.org/stable/c/418fae0700e85a498062424f8656435c32cdb200 ↗
- https://git.kernel.org/stable/c/68b99e94a4a2db6ba9b31fe0485e057b9354a640 ↗