Hi! I am in the process of setting up freeradius-3.0.21-37.el9.x86_64 on a new AlmaLinux 9.2 server to migrate from our old centos 7 servers. I have noticed that the server crashes with a segmentation fault if I enable debug logs (e.g. radiusd -X or with raddebug) and run a test with EAP-TLS. The test works fine and succeeds without debug logging. So it's something which only happens during debug logging. gdb backtrace from the core dump is #0 __strlen_avx2 () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:74 #1 0x00007ff611284268 in __vfprintf_internal (s=s@entry=0x7ffcc44437e0, format=format@entry=0x564c843544b8 "(TLS) Creating attributes from %s certificate", ap=ap@entry=0x7ffcc44439c0, mode_flags=mode_flags@entry=2) at vfprintf-internal.c:1647 #2 0x00007ff61129487a in __vsnprintf_internal (string=0x7ffcc4443a20 "(TLS) Creating attributes from ServerHelloDone\"\n", maxlen=<optimized out>, format=0x564c843544b8 "(TLS) Creating attributes from %s certificate", args=0x7ffcc44439c0, mode_flags=2) at vsnprintf.c:114 #3 0x00007ff611bec5dc in vsnprintf (__ap=0x7ffcc44439c0, __fmt=0x564c843544b8 "(TLS) Creating attributes from %s certificate", __n=10240, __s=0x7ffcc4443a20 "(TLS) Creating attributes from ServerHelloDone\"\n") at /usr/include/bits/stdio2.h:68 #4 vradlog_request (type=L_DBG, lvl=<optimized out>, request=0x564c85de2a30, msg=0x564c843544b8 "(TLS) Creating attributes from %s certificate", ap=0x7ffcc4446270) at src/main/log.c:695 #5 0x00007ff611bec801 in radlog_request (type=<optimized out>, lvl=<optimized out>, request=<optimized out>, msg=<optimized out>) at src/main/log.c:787 #6 0x0000564c8433b992 in ?? () #7 0x0000564c85c96368 in ?? () #8 0x0000564c85bf5aa0 in ?? () #9 0x3232363000000001 in ?? () #10 0x0000564c85c962d0 in ?? () #11 0x0000000000000003 in ?? () #12 0x3461626338663361 in ?? () #13 0x0000564c85d87380 in ?? () #14 0x0000564c85c96328 in ?? () #15 0x3039363639633635 in ?? () #16 0x6566323131383235 in ?? () #17 0x3563666364323264 in ?? () #18 0x0000000000000000 in ?? () It happens during handshake: (11) Auth-Type eap { (11) eap: Expiring EAP session with state 0x923d2dbc9836205f (11) eap: Finished EAP session with state 0x923d2dbc9836205f (11) eap: Previous EAP request found for state 0x923d2dbc9836205f, released from the list (11) eap: Peer sent packet with method EAP TLS (13) (11) eap: Calling submodule eap_tls to process data (11) eap_tls: (TLS) EAP Got final fragment (24 bytes) (11) eap_tls: (TLS) EAP Done initial handshake (11) eap_tls: (TLS) Handshake state - Server SSLv3/TLS write server done (11) eap_tls: (TLS) recv TLS 1.2 Handshake, Certificate Segmentation fault (core dumped) Tested with two different client certificates... Regards, Gerald