CVE-2022-50869

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> fs/ntfs3: Fix slab-out-of-bounds in r_page<br /> <br /> When PAGE_SIZE is 64K, if read_log_page is called by log_read_rst for<br /> the first time, the size of *buffer would be equal to<br /> DefaultLogPageSize(4K).But for *buffer operations like memcpy,<br /> if the memory area size(n) which being assigned to buffer is larger<br /> than 4K (log-&gt;page_size(64K) or bytes(64K-page_off)), it will cause<br /> an out of boundary error.<br /> Call trace:<br /> [...]<br /> kasan_report+0x44/0x130<br /> check_memory_region+0xf8/0x1a0<br /> memcpy+0xc8/0x100<br /> ntfs_read_run_nb+0x20c/0x460<br /> read_log_page+0xd0/0x1f4<br /> log_read_rst+0x110/0x75c<br /> log_replay+0x1e8/0x4aa0<br /> ntfs_loadlog_and_replay+0x290/0x2d0<br /> ntfs_fill_super+0x508/0xec0<br /> get_tree_bdev+0x1fc/0x34c<br /> [...]<br /> <br /> Fix this by setting variable r_page to NULL in log_read_rst.