CVE-2023-53091

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ext4: update s_journal_inum if it changes after journal replay<br /> <br /> When mounting a crafted ext4 image, s_journal_inum may change after journal<br /> replay, which is obviously unreasonable because we have successfully loaded<br /> and replayed the journal through the old s_journal_inum. And the new<br /> s_journal_inum bypasses some of the checks in ext4_get_journal(), which<br /> may trigger a null pointer dereference problem. So if s_journal_inum<br /> changes after the journal replay, we ignore the change, and rewrite the<br /> current journal_inum to the superblock.