Konstantin Khlebnikov wrote: > It seems boundng logic in do_fault_around is wrong: > > start_addr = max(address & fault_around_mask(), vma->vm_start); > off = ((address - start_addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1); > pte -= off; > pgoff -= off; > > Ok, off <= 511, but it might be bigger than pte offset in pte table. I don't see how it possible: fault_around_mask() cannot be more than 0x1ff000 (x86-64, fault_around_bytes == 2M). It means start_addr will be aligned to 2M boundary in this case which is start of the page table pte belong to. Do I miss something? -- Kirill A. Shutemov -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>