CVE-2023-54272

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> fs/ntfs3: Fix a possible null-pointer dereference in ni_clear()<br /> <br /> In a previous commit c1006bd13146, ni-&gt;mi.mrec in ni_write_inode()<br /> could be NULL, and thus a NULL check is added for this variable.<br /> <br /> However, in the same call stack, ni-&gt;mi.mrec can be also dereferenced<br /> in ni_clear():<br /> <br /> ntfs_evict_inode(inode)<br /> ni_write_inode(inode, ...)<br /> ni = ntfs_i(inode);<br /> is_rec_inuse(ni-&gt;mi.mrec) -&gt; Add a NULL check by previous commit<br /> ni_clear(ntfs_i(inode))<br /> is_rec_inuse(ni-&gt;mi.mrec) -&gt; No check<br /> <br /> Thus, a possible null-pointer dereference may exist in ni_clear().<br /> To fix it, a NULL check is added in this function.