On 12/23/2016 01:10 PM, John Fawcett wrote: > When logging in via ssh with user root and password authentication I get > a segfault in sshd. The problem is 100% reproduceable - I cannot login > remotely at all. Any help appreciated in trying to get this addressed. > > This is a centos 7.3 with all the latest updates applied > > openssh-6.6.1p1-31.el7.x86_64 > > Here's a backtrace captured by running sshd under gdb. > > /usr/sbin/sshd -d > [Thread debugging using libthread_db enabled] > Using host libthread_db library "/lib64/libthread_db.so.1". > process 14806 is executing new program: /usr/sbin/sshd > Missing separate debuginfos, use: debuginfo-install > keyutils-libs-1.5.8-3.el7.x86_64 > nss-softokn-freebl-3.16.2.3-14.4.el7.x86_64 pcre-8.32-15.el7_2.1.x86_64 > [Thread debugging using libthread_db enabled] > Using host libthread_db library "/lib64/libthread_db.so.1". > Detaching after fork from child process 14810. > > Program received signal SIGSEGV, Segmentation fault. > __strcmp_ssse3 () at ../sysdeps/x86_64/strcmp.S:212 > 212 movlpd (%rdi), %xmm1 > Missing separate debuginfos, use: debuginfo-install > bzip2-libs-1.0.6-13.el7.x86_64 cracklib-2.9.0-11.el7.x86_64 > elfutils-libelf-0.166-2.el7.x86_64 elfutils-libs-0.166-2.el7.x86_64 > keyutils-libs-1.5.8-3.el7.x86_64 libattr-2.4.46-12.el7.x86_64 > libcap-2.22-8.el7.x86_64 libgcc-4.8.5-11.el7.x86_64 > libpwquality-1.2.3-4.el7.x86_64 > nss-softokn-freebl-3.16.2.3-14.4.el7.x86_64 pcre-8.32-15.el7_2.1.x86_64 > systemd-libs-219-30.el7_3.6.x86_64 xz-libs-5.2.2-1.el7.x86_64 > #0 __strcmp_ssse3 () at ../sysdeps/x86_64/strcmp.S:212 > #1 0x0000555555584f2f in sshpam_auth_passwd > (authctxt=authctxt@entry=0x55555581fdb0, > password=password@entry=0x555555839900 "************") at auth-pam.c:1207 > #2 0x000055555556446b in auth_password (authctxt=0x55555581fdb0, > password=password@entry=0x555555839900 "************") at auth-passwd.c:149 > #3 0x0000555555578daa in mm_answer_authpassword (sock=5, > m=0x7fffffffda10) at monitor.c:860 > #4 0x000055555557b9b1 in monitor_read > (pmonitor=pmonitor@entry=0x55555581efb0, ent=0x55555580a390 > <mon_dispatch_proto20+80>, pent=pent@entry=0x7fffffffda78) at monitor.c:586 > #5 0x000055555557c7bc in monitor_child_preauth > (_authctxt=_authctxt@entry=0x55555581fdb0, pmonitor=0x55555581efb0) at > monitor.c:374 > #6 0x00005555555615f5 in privsep_preauth (authctxt=0x55555581fdb0) at > sshd.c:681 > #7 main (ac=<optimized out>, av=<optimized out>) at sshd.c:2094 > I reinstalled openssh-server package and it is now working. I am assuming there was some corruption. John _______________________________________________ openssh-unix-dev mailing list openssh-unix-dev@xxxxxxxxxxx https://lists.mindrot.org/mailman/listinfo/openssh-unix-dev
