CVE-2023-53622

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> gfs2: Fix possible data races in gfs2_show_options()<br /> <br /> Some fields such as gt_logd_secs of the struct gfs2_tune are accessed<br /> without holding the lock gt_spin in gfs2_show_options():<br /> <br /> val = sdp-&gt;sd_tune.gt_logd_secs;<br /> if (val != 30)<br /> seq_printf(s, ",commit=%d", val);<br /> <br /> And thus can cause data races when gfs2_show_options() and other functions<br /> such as gfs2_reconfigure() are concurrently executed:<br /> <br /> spin_lock(&amp;gt-&gt;gt_spin);<br /> gt-&gt;gt_logd_secs = newargs-&gt;ar_commit;<br /> <br /> To fix these possible data races, the lock sdp-&gt;sd_tune.gt_spin is<br /> acquired before accessing the fields of gfs2_tune and released after these<br /> accesses.<br /> <br /> Further changes by Andreas:<br /> <br /> - Don&amp;#39;t hold the spin lock over the seq_printf operations.