CVE-2023-53323

CVE-2023-53323 affects the Linux kernel ext2 with DAX on pmem: ext2/dax: Fix ext2_setsize when len is page aligned. The bug arises when PAGE_ALIGN(x) returns x for already-aligned x, causing dax_zero_range() to pass length 0 to iomap_begin(), which makes ext2_get_blocks() see max_blocks = 0 and t...