bug#37585: Undefined behavior in nl, print_lineno

[Paul Eggert]

On 10/2/19 7:50 AM, Roland Illig wrote:
> The current code says:
>
>    next_line_no = line_no + page_incr;
>    if (next_line_no < line_no)
>      die (EXIT_FAILURE, 0, _("line number overflow"));
>
> Since intmax_t is a regular integer type, overflow invokes undefined
> behavior and must therefore be checked using other means.

Thanks for the bug report. I looked for similar problems involving 
integer-overflow diagnostics in coreutils and installed the attached 
patches. The second patch should fix the bug you mentioned.

0001-cp-simplify-integer-overflow-checking.patch
Description: Text Data

0002-nl-fix-integer-overflow-bug.patch
Description: Text Data

0003-numfmt-avoid-unlikely-integer-overflow.patch
Description: Text Data

0004-truncate-avoid-integer-overflow-assumptions.patch
Description: Text Data