CVE-2025-39842

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ocfs2: prevent release journal inode after journal shutdown<br /> <br /> Before calling ocfs2_delete_osb(), ocfs2_journal_shutdown() has already<br /> been executed in ocfs2_dismount_volume(), so osb-&gt;journal must be NULL. <br /> Therefore, the following calltrace will inevitably fail when it reaches<br /> jbd2_journal_release_jbd_inode().<br /> <br /> ocfs2_dismount_volume()-&gt;<br /> ocfs2_delete_osb()-&gt;<br /> ocfs2_free_slot_info()-&gt;<br /> __ocfs2_free_slot_info()-&gt;<br /> evict()-&gt;<br /> ocfs2_evict_inode()-&gt;<br /> ocfs2_clear_inode()-&gt;<br /> jbd2_journal_release_jbd_inode(osb-&gt;journal-&gt;j_journal,<br /> <br /> Adding osb-&gt;journal checks will prevent null-ptr-deref during the above<br /> execution path.