CVE-2022-50839

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> jbd2: fix potential buffer head reference count leak<br /> <br /> As in &amp;#39;jbd2_fc_wait_bufs&amp;#39; if buffer isn&amp;#39;t uptodate, will return -EIO without<br /> update &amp;#39;journal-&gt;j_fc_off&amp;#39;. But &amp;#39;jbd2_fc_release_bufs&amp;#39; will release buffer head<br /> from ‘j_fc_off - 1’ if &amp;#39;bh&amp;#39; is NULL will terminal release which will lead to<br /> buffer head buffer head reference count leak.<br /> To solve above issue, update &amp;#39;journal-&gt;j_fc_off&amp;#39; before return -EIO.