https://bugs.openldap.org/show_bug.cgi?id=10124

Issue ID: 10124 Summary: olcTLSDHParamFile causes slapd general protection fault error:0 in libcrypto.so.3.0.7 Product: OpenLDAP Version: 2.5.16 Hardware: All OS: Linux Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: slapd Assignee: bugs@openldap.org Reporter: r.g.van.der.kleij@umail.leidenuniv.nl Target Milestone: ---

I am not sure this is even an openldap bug, but just in case it is I report it here.

I build openldap 2.5 from source on Rocky linux 9.2.

The previous build version 2.5.14 would run fine, but 2.5.16 would crash at startup with error:

kernel: traps: slapd[3909] general protection fault ip:7fea2f19f2d2 sp:7fff76b17c00 error:0 in libcrypto.so.3.0.7[7fea2f0ad000+25b000]

Since even in full debug nothing was logged apart from this error I started eliminating configuration items, ending up with only the config below. A fresh slapd 2.5.14 would start with only this ldif slapadded, 2.5.16 would not on the same server. Leaving out olcTLSDHParamFile would cause everything to work again. I tried regenerating a fresh 2048 bit dhparam file instead of the 4096 I was using, but no difference.

openssl dhparam -out ./dhparam.pem 2048

dn: cn=config objectClass: olcGlobal cn: config olcArgsFile: /var/run/scs-slapd/slapd.args olcDisallows: bind_anon olcLogLevel: stats sync olcPasswordCryptSaltFormat: $6$%.16s olcPasswordHash: {CRYPT} olcPidFile: /var/run/scs-slapd/slapd.pid olcRequires: authc olcTLSCACertificateFile: "/etc/scs/openldap/certs/ca_chain.pem" olcTLSCertificateFile: /etc/scs/openldap/certs/cert.pem olcTLSCertificateKeyFile: /etc/scs/openldap/certs/key.pem olcTLSCipherSuite: ECDHE-RSA-AES256-SHA384:AES256-SHA256:!RC4:HIGH:!MD5:!aNULL :!EDH:!EXP:!SSLV2:!eNULL olcTLSCRLCheck: none olcTLSVerifyClient: allow olcTLSDHParamFile: /etc/ssl/dhparam.pem olcTLSProtocolMin: 3.3 olcToolThreads: 2

Both openssl-devel and gnutls-devel were available on the build system, but as far as I can see openssl would be preferred when available and was indeed used. (I tried both --with-tls=auto and --with-tls=openssl )

Make test would finish without issues

My configure options:

./configure --prefix=$SCS_TARGET --sysconfdir=$SCS_TARGET_ETC \ --enable-debug \ --enable-slapd \ --with-systemd \ --enable-modules \ --with-tls=auto \ --with-cyrus-sasl \ --with-argon2 \ --enable-crypt \ --enable-spasswd \ --enable-rlookups \ --enable-overlays=mod \ --enable-syncprov=yes \ --enable-accesslog=mod \ --enable-backends=mod \ --enable-mdb=yes \ --enable-ndb=no \ --enable-sql=no \ --enable-wt=no \ --disable-shell

The results in the configure log: TLS_LIBS='-lssl -lcrypto' WITH_TLS='yes' WITH_TLS_TYPE='openssl'