--001a11c39c4eeea62d05232d4fc9 Content-Type: text/plain; charset=UTF-8 adding the -fstack-protector-all option to the compile of the pw-sha2 on the 3.18 machine and recompiling just the pw-sha2 appears to have fixed the issue. Regards, Kevin Martin --- Regards, Kevin Martin On Wed, Oct 28, 2015 at 9:58 AM, Howard Chu <hyc(a)symas.com&gt; wrote: --001a11c39c4eeea62d05232d4fc9 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr">adding the -fstack-protector-all option to the compile of = the pw-sha2 on the 3.18 machine and recompiling just the pw-sha2 appears to= have fixed the issue.<div><br></div><div>Regards,</div><div><br></div><div= ail_extra"><br clear=3D"all"><div><div class=3D"gmail_signature"><div dir= =3D"ltr">---<div><span style=3D"font-size:12.8px"><br></span></div><div><sp= an style=3D"font-size:12.8px"><br></span></div><div><span style=3D"font-siz= e:12.8px">Regards,</span></div><div><div><br></div><div>Kevin Martin</div><= /div></div></div></div<br><div class=3D"gmail_quote">On Wed, Oct 28, 2015 at 9:58 AM, Howard Chu = <span dir=3D"ltr">&lt;<a href=3D"mailto:hyc@symas.com" target=3D"_blank">hy= c(a)symas.com&lt;/a&gt;&amp;gt;&lt;/span&gt; wrote:<br><blockquote class=3D"gmail_quote" styl= e=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span c= lass=3D"">Howard Chu wrote:<br<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p= x #ccc solid;padding-left:1ex"<a href=3D"mailto:ktmdms@gmail.com" target=3D&quot;_blank&quot;&gt;ktmdms(a)gmail.com&lt;/a&gt; = wrote:<br<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p= x #ccc solid;padding-left:1ex"--089e0115ec1091312605232ac99f<brContent-Type: text/plain; charset=3DUTF-8<br<brTo add fuel to the fire, if I use pw-sha2 libraries that were built on a<br= 2.6 kernel (specifically 2.6.32-358.el6.x86_64) on the 3.18 machine I can<b= rgenerate SHA512/384 hashed passwords with no issues.=C2=A0 What should I be= <brlooking for between the two platforms that might cause the core?<br</blockquote<brStrange that the kernel would make any difference - more likely it&#39;s yo= ur C<brcompiler making the difference.<br</blockquote<br></spanI may have misread your message. If the same binary works on a newer system= , that tends to imply something weird in the runtime environment. Perhaps a= problem with ASLR.<div class=3D"HOEnZb"><div class=3D"h5"><br<br<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p= x #ccc solid;padding-left:1ex"I ran a test on one machine and got an abort in glibc saying there was a st= ack<broverrun. On a different machine I got no such error, and running on the<brproblem system under valgrind produced no errors.<br<brOn the machine that aborted, when I compiled with gcc -fstack-protector-all= ,<brthe glibc abort disappeared as well. So, this hasn&#39;t helped me identify= the<brproblem yet. (gcc 4.8.4-2ubuntu1~14.04)<br<br</blockquote<br<br-- <br=C2=A0 -- Howard Chu<br=C2=A0 CTO, Symas Corp.=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"= http://www.symas.com" rel=3D"noreferrer" target=3D"_blank">http://www.symas= .com</a><br=C2=A0 Director, Highland Sun=C2=A0 =C2=A0 =C2=A0<a href=3D"http://highland= sun.com/hyc/" rel=3D"noreferrer" target=3D"_blank">http://highlandsun.com/h= yc/</a><br=C2=A0 Chief Architect, OpenLDAP=C2=A0 <a href=3D"http://www.openldap.org/p= roject/" rel=3D"noreferrer" target=3D"_blank">http://www.openldap.org/proje= ct/</a><br</div></div></blockquote></div><br></div --001a11c39c4eeea62d05232d4fc9--