CVE-2022-50266

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> kprobes: Fix check for probe enabled in kill_kprobe()<br /> <br /> In kill_kprobe(), the check whether disarm_kprobe_ftrace() needs to be<br /> called always fails. This is because before that we set the<br /> KPROBE_FLAG_GONE flag for kprobe so that "!kprobe_disabled(p)" is always<br /> false.<br /> <br /> The disarm_kprobe_ftrace() call introduced by commit:<br /> <br /> 0cb2f1372baa ("kprobes: Fix NULL pointer dereference at kprobe_ftrace_handler")<br /> <br /> to fix the NULL pointer reference problem. When the probe is enabled, if<br /> we do not disarm it, this problem still exists.<br /> <br /> Fix it by putting the probe enabled check before setting the<br /> KPROBE_FLAG_GONE flag.