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Change History

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

uacce: fix isolate sysfs check condition

uacce supports the device isolation feature. If the driver
implements the isolate_err_threshold_read and
isolate_err_threshold_write callback functions, uacce will create
sysfs files now. Users can read and configure the isolation policy
through sysfs. Currently, sysfs files are created as long as either
isolate_err_threshold_read or isolate_err_threshold_write callback
functions are present.

However, accessing a non-existent callback function may cause the
system to crash. Therefore, intercept the creation of sysfs if
neither read nor write exists; create sysfs if either is supported,
but intercept unsupported operations at the call site.

https://git.kernel.org/stable/c/82821a681d5dcce31475a65190fc39ea8f372cc0

https://git.kernel.org/stable/c/98eec349259b1fd876f350b1c600403bcef8f85d

https://git.kernel.org/stable/c/9ab05cdcac354b1b1139918f49c6418b9005d042

https://git.kernel.org/stable/c/fdbbb47d15ae17bf39fafec7e2028c1f8efba15e