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bug(sort): using --check=diagnose-first with /dev/urandom and /dev/mem and other devices leads to different outputs and slowdown 21x times #13149

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@HackingRepo

Hi, uutils mainteners

we confirmed the uu sort input very small and different than the gnu sort when using --check=diagnose-first, as i confirmed

relunsec@relunsec:~/software/coreutils/target/debug$ sudo gnusort --check=diagnose-first /dev/mem
gnusort: /dev/mem:4: disorder: I*KNM`P �R T 
                                            X *Z N\ `�a�b ��d�e ��g�h �jk -m-n -GpGq G~ ��	�� �-`�
�� �@� 1X (�V 1X Pd@A&0�6� A 0`0*�Q*@0p�4�Q*@�H?@0b�2@@�h[��r�<P�������E����������E��                  д �1l�rQ� n(UĎ!�	�� �"
                                                                                  For Evaluation Use Only.
relunsec@relunsec:~/software/coreutils/target/debug$ sudo ./sort --check=diagnose-first /dev/mem
sort: /dev/mem:2: disorder:*2:-
                                 =Y
relunsec@relunsec:~/software/coreutils/target/debug$ 

and we confirmed also the uu sort slow in that benchmark

relunsec@relunsec:~/software/coreutils/target/debug$ sudo time ./sort --check=diagnose-first /dev/mem
sort: /dev/mem:2: disorder:*2:-
                                 =Y
Command exited with non-zero status 1
0.81user 0.04system 0:00.85elapsed 100%CPU (0avgtext+0avgdata 7076maxresident)k
0inputs+0outputs (0major+659minor)pagefaults 0swaps
relunsec@relunsec:~/software/coreutils/target/debug$ sudo time gnusort --check=diagnose-first /dev/mem
gnusort: /dev/mem:4: disorder: I*KNM`P �R T 
                                            X *Z N\ `�a�b ��d�e ��g�h �jk -m-n -GpGq G~ ��	�� �-`�
�� �@� 1X (�V 1X Pd@A&0�6� A 0`0*�Q*@0p�4�Q*@�H?@0b�2@@�h[��r�<P�������E����������E��                  д �1l�rQ� n(UĎ!�	�� �"
                                                                                  For Evaluation Use Only.
Command exited with non-zero status 1
0.00user 0.03system 0:00.04elapsed 100%CPU (0avgtext+0avgdata 2404maxresident)k
0inputs+0outputs (0major+309minor)pagefaults 0swaps
relunsec@relunsec:~/software/coreutils/target/debug$ 

and also with

relunsec@relunsec:~/software/coreutils/target/debug$ sudo time gnusort --check=diagnose-first /dev/urandom
gnusort: /dev/urandom:3: disorder: �����Ǿ
Command exited with non-zero status 1
0.00user 0.00system 0:00.06elapsed 10%CPU (0avgtext+0avgdata 1612maxresident)k
448inputs+0outputs (2major+158minor)pagefaults 0swaps
relunsec@relunsec:~/software/coreutils/target/debug$ sudo time ./sort --check=diagnose-first /dev/urandom
sort: /dev/urandom:3: disorder: weK5~�Z�9��h�Y�I#��X������)��<�j�Դ����
�@�␦}|́�����.ò`7qf�r�fn)�����x"^V�^�~?wG���Xd�W�␦B��2�H�Ȼ��/S�j��a8uibB�)5)�y/q�Nb���2�����-���I�
                                                                                                k�ߦ��ugwG2rd��0$���4�$g6O%S[�����x$(f�����]�x�X2�2uzɽ�3��u��6���m�$(%���soȋ^`:��8�HC� �5
                                                                                                                                                                                        ���.{H��%��T���?��'4���<�vG׹2�ᝓx/̜.+#��R}"����}N�Y(���4�(�R�g}��V>�܀b��z��I�WW�'�G�/{) 15i~eW'^����`�z�����	�l��K�:�WG`���N�h����]g����1���<␦��������(��K4z�4R炝�? Z%��Y�VK �Gd�(z�K�N6��$�z��ߗ�ɥ 3�y0���Z�
                                                                                                                                                       �Cw��	caL��щl��O��}�c�AZu�4d��*�zuʼnL6sE��d��I,'HIa�?i��
Command exited with non-zero status 1
0.21user 0.00system 0:00.22elapsed 100%CPU (0avgtext+0avgdata 6636maxresident)k
0inputs+0outputs (12major+481minor)pagefaults 0swaps
relunsec@relunsec:~/software/coreutils/target/debug$ sudo time gnusort --check=diagnose-first /dev/urandom
�J�&n"V�cW�&�[��6>dom:2: disorder: ��n������
Command exited with non-zero status 1
0.00user 0.00system 0:00.00elapsed 100%CPU (0avgtext+0avgdata 1768maxresident)k
0inputs+0outputs (0major+158minor)pagefaults 0swaps
relunsec@relunsec:~/software/coreutils/target/debug$ sudo time gnusort --check=diagnose-first /dev/urandom
gnusort: /dev/urandom:3: disorder: �.<i��J7�S�����eB@5&�� vϯ̒�k>n3uC-y�+Y������ŗN=�O)]�)c�t�v��g~�٫\vW*S5	5fĻ���=|rt،�P��M�,��J"^���H�eo
                                                                                                                                               �	W�\J�"�~�
                                                                                                                                                                 ƻ��j6�@#¶f��� ���|;�ࡷ'␦p14��I}�	�Bm̯�K_q�uj��K����yE�j�"1�;��`�pD���|�g���
��J��1�6'���HT��$�JM��@V~P���؈T��!����=�"��eL6���A�;�b��O��C¿��&fM�	����W.�\V�X���`E8�G>�N�=�.�Y����(9�qZ���Z���`l��°z�"9W^)P"�XN$��n4�
                                                                                                                                           �/M��K␦���q��q�^E�>�.d�jWg2�:j=��M���g?�U}�9�Q�we�}4��A�Z�bƎ0Ǵ�`[ޝY^����p��I��t�q~{�1ۮ/��+$�Ŧ��\�g�+s�Uv���Ni�$d%X	Ɲ��␦sx�V�򖏦��+��<X��NB�帊}�:ܒN_���g�&$������"z<䲌��&6p���BL������[�
Command exited with non-zero status 1
0.00user 0.00system 0:00.00elapsed 100%CPU (0avgtext+0avgdata 1752maxresident)k
0inputs+0outputs (0major+159minor)pagefaults 0swaps
relunsec@relunsec:~/software/coreutils/target/debug$ sudo time gnusort --check=diagnose-first /dev/urandom
gnusort: /dev/urandom:3: disorder: |���5W�C����E*l���d����y85=K#��n�j7�lj6O�s���EDd��O�eW����:k �z
_yt0����                                                                                         ���n��XT͡iX[Q��|������P�ϔ�T�����ji6L�aݤ��g(���{\��ui.������<H�*#L�q��ؐ����mi��Ѕ���
Command exited with non-zero status 1
0.00user 0.00system 0:00.00elapsed 100%CPU (0avgtext+0avgdata 1656maxresident)k
0inputs+0outputs (1major+157minor)pagefaults 0swaps
relunsec@relunsec:~/software/coreutils/target/debug$ sudo time gnusort --check=diagnose-first /dev/urandom
gnusort: /dev/urandom:3: disorder: �␦ ^�{I�oͧ��!h��O��M�ٸ��uP�ƣx+��"��A-ꧽ��=Kg�,�%
                                                                                 _�<�F�IT�[��}�B�Hȁ�6��v̱���yR�wܢ6␦�ͩ�y��^e�S&�PU�4��Ј܃�e2a�k�{�ƾ�R^�LK]Nw
                                                                                                                                                        �xc���m�ᎍ�D�␦�J|�
                                                                                                                                                                         ���EsS�M��S��zB�J_��EÀ�C����%��3��ShW#z]4fq��`�����;3f�k6�����m𲛛�������g�^�gaO�INn�>]���t��{jP�6���3$��Po<��Z␦�8�K���b���܋e%6VRƑy]�g�m�<CP<��+f�(Y11�m�(���� �0��Y<PU��6���Ʀ!G:��՘��op2r�G�m}���e&
                                                                                                                               🺩<���HX�3K@`5�������y��/�`�P=rw��t�=K�[���~M�Sk�����S�)$��pGk�K�z�}]9��8R�Bzxg#�ã܋�x#����ߥ��H�N�?\j���iJ����Sj�~6;4�Y95�d{
Command exited with non-zero status 1
0.00user 0.00system 0:00.00elapsed 100%CPU (0avgtext+0avgdata 1864maxresident)k
0inputs+0outputs (2major+157minor)pagefaults 0swaps
relunsec@relunsec:~/software/coreutils/target/debug$ sudo time gnusort --check=diagnose-first /dev/urandom
gnusort: /dev/urandom:5: disorder: V�x>^���Nu��B���m�Q0uZ%��2
Command exited with non-zero status 1
0.00user 0.00system 0:00.00elapsed 50%CPU (0avgtext+0avgdata 1764maxresident)k
0inputs+0outputs (0major+160minor)pagefaults 0swaps
relunsec@relunsec:~/software/coreutils/target/debug$ sudo time gnusort --check=diagnose-first /dev/urandom
gnusort: /dev/urandom:5: disorder: =$��Ӽ������OB�[��)�
                                                      �@C6;�=rV/��S�̝���⨙�N�k��L�b�Y*D�)r>t��L��Nd��3���c[�y%��0)�)��]�o��N���m��#�[����r�	�W1�z�,ʣ���`�o�c�0�Z���r�ճ%Z�}�Z�2�PL*ҝ��D3�4��3	b-�r���=��␦c�A5X�'��|!�u�ZGJ����Y6v�Q�ϫ{V~C��2$2Ю��U�7�E�Q�nD�߱���u�{��OJu����o����,�p<���R ���:؛7
       ^�7���!�t��)�L����g#bH
                             ��
                               ��"4�!�p�����x�l�oP��o�W�3�������n���(��#:����<�6o��\D_ڀE�V�)���6[�����N�򗄆��4�&r�p�vJ�h%7��S�sx��R�k�F�Z-qa��/�c:}�|���	ʪ�w�����^MC�i��� F1��$�����-!��4�Q�1�v␦�im	q)Ď�A,��7=&�pŃ��g7�␦�[�7���Fk��I���0x1��{(�L�*��'��t[��}J<#�Ġ=/��(���(��*6`~�t��K̤HgQrGƑ��xYЁ�o�3�Z
                                                             �O���%�!���Z���Ա�@P����`�. ޿�s�'@0|���]a��:QT��T'�.�%Pi�83�V���6��ޮ4�!�#_{c?�0az��QWߣ���:�c�j�␦���1��j�3�?�G���k/[�ː���������6�sgb閁�Mj�ߓ���Q���)Txeoz'㷏�h��'#)*#h��v�Ġ�[��p�|�vp6�?j-N�y�ն�����
Command exited with non-zero status 1
0.00user 0.00system 0:00.00elapsed 33%CPU (0avgtext+0avgdata 1768maxresident)k
0inputs+0outputs (1major+160minor)pagefaults 0swaps
relunsec@relunsec:~/software/coreutils/target/debug$ sudo time gnusort --check=diagnose-first /dev/urandom
gnusort: /dev/urandom:3: disorder: ���ƉJ��jEұ	P>�h��$w�I�mp��
                                                               ���6�F�vP�G�3�$�,=�t�&rm|k�8�Ph<�
��<!��:�z                                                                                        �ZF5��E�K�sR/�@�s,�����&�絩��nZ��<�eR��[��N7��)�~��r^.ڃ�t���=>��"W���+x 9x��f/_%�%�*���Y�ش�K��o�.)�U��#���V6߂��x~@�=�T�o��؛�0{Z�&���
Command exited with non-zero status 1
0.00user 0.00system 0:00.00elapsed 83%CPU (0avgtext+0avgdata 1776maxresident)k
0inputs+0outputs (2major+162minor)pagefaults 0swaps
relunsec@relunsec:~/software/coreutils/target/debug$ sudo time gnusort --check=diagnose-first /dev/urandom
n���d�]��+Q��W��l��ό�@BA�E�f�{&�st������N�E�P��1e&s4����N���(�h^*����$f�[�~-x!�\9�Ę��%֯1�ސ9;BvAi�������k�K�<�e�ռP>��\#��+�C���D��v���۔uC���6tJSJ�k���E`��^�7���eڼ0J��<<����+	<����E4�N�G���,`
                                                                                                                                            �/�����)���0~���dZ� D��O�:3���%� `�
Command exited with non-zero status 1
0.00user 0.00system 0:00.00elapsed 100%CPU (0avgtext+0avgdata 1724maxresident)k
0inputs+0outputs (0major+159minor)pagefaults 0swaps
relunsec@relunsec:~/software/coreutils/target/debug$ sudo time ./sort --check=diagnose-first /dev/urandom
sort: /dev/urandom:3: disorder: j��,��YaW�#�y��?�S�qC�C�L���␦�ᦃ�'v���n��R�䐉��/c�����y������3���O�솰�������ϴ8
�U��h,�%4#�����{x�*����y��~j��	��5�1�[V��Q,
���L,�����Yӊ��è�� �bMW�g$*-oJK�7�l3s������)��
Command exited with non-zero status 1
0.20user 0.01system 0:00.21elapsed 99%CPU (0avgtext+0avgdata 6652maxresident)k
0inputs+0outputs (0major+477minor)pagefaults 0swaps
relunsec@relunsec:~/software/coreutils/target/debug$ 

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