Hello Mike, commit a7259df767 ("memblock: make memblock_find_in_range method private") [1] invokes a kernel panic while running kmemleak on OF platforms with nomaped regions, basically it's similar to an issue reported and fixed earlier by [2]: Unable to handle kernel paging request at virtual address ffff000021e00000 [...] scan_block+0x64/0x170 scan_gray_list+0xe8/0x17c kmemleak_scan+0x270/0x514 kmemleak_write+0x34c/0x4ac I believe it would be a trivial problem to correct for you, thank you in advance! [1] https://lore.kernel.org/all/20210816122622.30279-1-rppt@xxxxxxxxxx/T/#u [2] https://lore.kernel.org/lkml/20190119132832.GA29881@MBP.local/t/#m032124f36c07 -- Best wishes, Vladimir