I'm seeing many of these in my log as we use the 'finger' program (which essentially prints out who's logged in):
/var/log/syslog:Jan 21 17:24:02 hostname kernel: [994887.868396] Code: 7b 20 00 0f 85 cc fe ff ff 31 c0 48 8d 3d 80 18 00 00 e8 7e 0f 00 00 83 7b 08 01 0f 85 d0 fe ff ff 48 8d 7b 18 e8 8b e8 ff ff <8b> 70 1c 85 f6 0f 85 d0 00 00 00 8b 70 08 8b 50 04 85 f6 0f 85 f2 /var/log/syslog:Jan 21 17:46:20 hostname kernel: [996225.511633] finger[535517]: segfault at 1c ip 000055c42a3ccad5 sp 00007ffd268c28b0 error 4 in finger[55c42a3cb000+3000] likely on CPU 0 (core 0, socket 0) It doesn't happen all the time. It seems to be linked to tmux where tmux but I wouldn't swear to it.
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