阿里云漏洞库

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

thermal/debugfs: Add missing count increment to thermal_debug_tz_trip_up()

The count field in struct trip_stats, representing the number of times

the zone temperature was above the trip point, needs to be incremented

in thermal_debug_tz_trip_up(), for two reasons.

First, if a trip point is crossed on the way up for the first time,

thermal_debug_update_temp() called from update_temperature() does

not see it because it has not been added to trips_crossed[] array

in the thermal zone's struct tz_debugfs object yet. Therefore, when

thermal_debug_tz_trip_up() is called after that, the trip point's

count value is 0, and the attempt to divide by it during the average

temperature computation leads to a divide error which causes the kernel

to crash. Setting the count to 1 before the division by incrementing it

fixes this problem.

Second, if a trip point is crossed on the way up, but it has been

crossed on the way up already before, its count value needs to be

incremented to make a record of the fact that the zone temperature is

above the trip now. Without doing that, if the mitigations applied

after crossing the trip cause the zone temperature to drop below its

threshold, the count will not be updated for this episode at all and

the average temperature in the trip statistics record will be somewhat

higher than it should be.

Cc :6.8+ <stable@vger.kernel.org> # 6.8+

建议您更新当前系统或软件至最新版，完成漏洞的修复。

参考链接
https://git.kernel.org/stable/c/9c8215d32e730b597c809a9d2090bf8ec1b79fcf
https://git.kernel.org/stable/c/b552f63cd43735048bbe9bfbb7a9dcfce166fbdd

CWE-ID	漏洞类型