CVE-2022-48996

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> mm/damon/sysfs: fix wrong empty schemes assumption under online tuning in damon_sysfs_set_schemes()<br /> <br /> Commit da87878010e5 ("mm/damon/sysfs: support online inputs update") made<br /> &amp;#39;damon_sysfs_set_schemes()&amp;#39; to be called for running DAMON context, which<br /> could have schemes. In the case, DAMON sysfs interface is supposed to<br /> update, remove, or add schemes to reflect the sysfs files. However, the<br /> code is assuming the DAMON context wouldn&amp;#39;t have schemes at all, and<br /> therefore creates and adds new schemes. As a result, the code doesn&amp;#39;t<br /> work as intended for online schemes tuning and could have more than<br /> expected memory footprint. The schemes are all in the DAMON context, so<br /> it doesn&amp;#39;t leak the memory, though.<br /> <br /> Remove the wrong asssumption (the DAMON context wouldn&amp;#39;t have schemes) in<br /> &amp;#39;damon_sysfs_set_schemes()&amp;#39; to fix the bug.