--- a/fs/coredump.c~fs-coredump-use-kmap_local_page +++ a/fs/coredump.c @@ -897,10 +897,10 @@ int dump_user_range(struct coredump_para */ page = get_dump_page(addr); if (page) { - void *kaddr = kmap(page); + void *kaddr = kmap_local_page(page); stop = !dump_emit(cprm, kaddr, PAGE_SIZE); - kunmap(page); + kunmap_local(kaddr); put_page(page); } else { stop = !dump_skip(cprm, PAGE_SIZE);