CVE-2022-49493

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ASoC: rt5645: Fix errorenous cleanup order<br /> <br /> There is a logic error when removing rt5645 device as the function<br /> rt5645_i2c_remove() first cancel the &amp;rt5645-&gt;jack_detect_work and<br /> delete the &amp;rt5645-&gt;btn_check_timer latter. However, since the timer<br /> handler rt5645_btn_check_callback() will re-queue the jack_detect_work,<br /> this cleanup order is buggy.<br /> <br /> That is, once the del_timer_sync in rt5645_i2c_remove is concurrently<br /> run with the rt5645_btn_check_callback, the canceled jack_detect_work<br /> will be rescheduled again, leading to possible use-after-free.<br /> <br /> This patch fix the issue by placing the del_timer_sync function before<br /> the cancel_delayed_work_sync.