Description of problem:
sssd_be sometimes segfaults under load

Version-Release number of selected component (if applicable):
cyrus-sasl-2.1.27-6.el8_5.x86_64

How reproducible:
on an nvidia DGX100 joined to an IPA realm running an mpi all_reduce performance test

Additional info:

#0 sasl_gss_encode (context=0x0, invec=<optimized out>, numiov=<optimized out>, output=0x562cff3bc538, outputlen=0x7ffd58ffb594, privacy=1) at gssapi.c:370
#1 0x00007f2f6de215ee in _sasl_encodev (conn=conn@entry=0x562cff412780, invec=invec@entry=0x7ffd58ffb560, numiov=numiov@entry=1, p_num_packets=p_num_packets@entry=0x7ffd58ffb4fc,
output=output@entry=0x562cff3bc538, outputlen=outputlen@entry=0x7ffd58ffb594) at common.c:359
#2 0x00007f2f6de23623 in sasl_encodev (conn=conn@entry=0x562cff412780, invec=invec@entry=0x7ffd58ffb560, numiov=numiov@entry=1, output=output@entry=0x562cff3bc538, outputlen=outputlen@entry=0x7ffd58ffb594)
at common.c:582
#3 0x00007f2f6de23750 in sasl_encode (conn=0x562cff412780, input=<optimized out>, inputlen=<optimized out>, output=output@entry=0x562cff3bc538, outputlen=outputlen@entry=0x7ffd58ffb594) at common.c:304
#4 0x00007f2f6e4730ca in sb_sasl_cyrus_encode (p=0x562cff3bc4b0, buf=<optimized out>, len=<optimized out>, dst=0x562cff3bc520) at cyrus.c:157
#5 0x00007f2f6e476350 in sb_sasl_generic_write (sbiod=0x562cff3b8880, buf=0x562cff419ff0, len=<optimized out>) at sasl.c:783
#6 0x00007f2f6e25585c in sb_debug_write (sbiod=0x562cff3a3050, buf=0x562cff419ff0, len=286) at sockbuf.c:854
#7 0x00007f2f6e25585c in sb_debug_write (sbiod=0x562cff3c2900, buf=0x562cff419ff0, len=286) at sockbuf.c:854
#8 0x00007f2f6e256f85 in ber_int_sb_write (sb=sb@entry=0x562cff2ef480, buf=0x562cff419ff0, len=len@entry=286) at sockbuf.c:445
#9 0x00007f2f6e253223 in ber_flush2 (sb=0x562cff2ef480, ber=0x562cff3720f0, freeit=freeit@entry=0) at io.c:246
#10 0x00007f2f6e481775 in ldap_int_flush_request (ld=ld@entry=0x562cff3d81a0, lr=lr@entry=0x562cff2ef2a0) at request.c:186
#11 0x00007f2f6e4819a7 in ldap_send_server_request (ld=ld@entry=0x562cff3d81a0, ber=ber@entry=0x562cff3720f0, msgid=msgid@entry=13, parentreq=parentreq@entry=0x0, srvlist=srvlist@entry=0x0,
lc=<optimized out>, lc@entry=0x0, bind=0x0, m_noconn=0, m_res=0) at request.c:408

Based on the conditions, I suspect this may be resolved with the upstream commit https://github.com/cyrusimap/cyrus-sasl/commit/df037bd4e20f7508fc36a9292d75e94c04dc8daa