You opened a bug against the RHEL 9 product, but the RPM you mention is an RHEL 8 rpm, did you file against the wrong product or did you copy the wrong rpm version?

Sorry, the crash happened on 8.   Our next update cycle will be on 9, though, so a fix in 8 won't help us in particular.


if the full backtrace is helpful, this is it with the domain name redacted:
#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
#12 0x00007f2f6e481e26 in ldap_send_initial_request (ld=ld@entry=0x562cff3d81a0, msgtype=msgtype@entry=99, dn=dn@entry=0x562cff3c2f60 "cn=certmap,dc=XXX,dc=facebook,dc=com", ber=0x562cff3720f0, msgid=13)
    at request.c:169
#13 0x00007f2f6e470d32 in ldap_pvt_search (ld=0x562cff3d81a0, base=0x562cff3c2f60 "cn=certmap,dc=XXX,dc=facebook,dc=com", scope=2, 
    filter=0x7f2f6a8afb10 "(|(&(objectClass=ipaCertMapRule)(ipaEnabledFlag=TRUE))(objectClass=ipaCertMapConfigObject))", attrs=0x7ffd58ffbd10, attrsonly=0, sctrls=0x562cff3d7990, cctrls=0x0, timeout=0x0, 
    sizelimit=0, deref=-1, msgidp=0x7ffd58ffba64) at search.c:128
#14 0x00007f2f6e470e14 in ldap_search_ext (ld=<optimized out>, base=<optimized out>, scope=<optimized out>, filter=<optimized out>, attrs=<optimized out>, attrsonly=<optimized out>, sctrls=0x562cff3d7990, 
    cctrls=0x0, timeout=0x0, sizelimit=0, msgidp=0x7ffd58ffba64) at search.c:69
#15 0x00007f2f6a1760d9 in sdap_get_generic_ext_step (req=req@entry=0x562cff3d76d0) at src/providers/ldap/sdap_async.c:1629
#16 0x00007f2f6a1765e9 in sdap_get_generic_ext_send (memctx=<optimized out>, ev=ev@entry=0x562cff2da460, opts=opts@entry=0x562cff2eab30, sh=sh@entry=0x562cff3b4dc0, 
    search_base=search_base@entry=0x562cff3c2f60 "cn=certmap,dc=XXX,dc=facebook,dc=com", scope=scope@entry=2, 
    filter=0x7f2f6a8afb10 "(|(&(objectClass=ipaCertMapRule)(ipaEnabledFlag=TRUE))(objectClass=ipaCertMapConfigObject))", attrs=0x7ffd58ffbd10, serverctrls=0x0, clientctrls=0x0, sizelimit=0, timeout=0, 
    parse_cb=0x7f2f6a173ae0 <sdap_get_and_parse_generic_parse_entry>, cb_data=0x562cff3dd390, flags=0) at src/providers/ldap/sdap_async.c:1567
#17 0x00007f2f6a177270 in sdap_get_and_parse_generic_send (memctx=memctx@entry=0x562cff3fa7a0, ev=ev@entry=0x562cff2da460, opts=opts@entry=0x562cff2eab30, sh=sh@entry=0x562cff3b4dc0, 
    search_base=search_base@entry=0x562cff3c2f60 "cn=certmap,dc=XXX,dc=facebook,dc=com", scope=scope@entry=2, 
    filter=0x7f2f6a8afb10 "(|(&(objectClass=ipaCertMapRule)(ipaEnabledFlag=TRUE))(objectClass=ipaCertMapConfigObject))", attrs=0x7ffd58ffbd10, map=0x0, map_num_attrs=0, attrsonly=0, serverctrls=0x0, 
    clientctrls=0x0, sizelimit=0, timeout=0, allow_paging=false) at src/providers/ldap/sdap_async.c:2020
#18 0x00007f2f6a177512 in sdap_get_generic_send (memctx=0x562cff3fa7a0, ev=0x562cff2da460, opts=0x562cff2eab30, sh=0x562cff3b4dc0, search_base=0x562cff3c2f60 "cn=certmap,dc=XXX,dc=facebook,dc=com", scope=2, 
    filter=0x7f2f6a8afb10 "(|(&(objectClass=ipaCertMapRule)(ipaEnabledFlag=TRUE))(objectClass=ipaCertMapConfigObject))", attrs=0x7ffd58ffbd10, map=0x0, map_num_attrs=0, timeout=0, allow_paging=false)
    at src/providers/ldap/sdap_async.c:2121
#19 0x00007f2f6a871e52 in ipa_subdomains_refresh_ranges_done () from /usr/lib64/sssd/libsss_ipa.so
#20 0x00007f2f717b1ec2 in _tevent_req_error (req=<optimized out>, error=<optimized out>, location=<optimized out>) at ../../tevent_req.c:211
#21 0x00007f2f6a870969 in ipa_subdomains_ranges_done () from /usr/lib64/sssd/libsss_ipa.so
#22 0x00007f2f717b1ec2 in _tevent_req_error (req=req@entry=0x562cff3dfff0, error=error@entry=5, location=location@entry=0x7f2f6a1d7b20 "src/providers/ldap/sdap_ops.c:192") at ../../tevent_req.c:211
#23 0x00007f2f6a1a2a52 in sdap_search_bases_ex_done (subreq=0x0) at src/providers/ldap/sdap_ops.c:192
#24 0x00007f2f717b1ec2 in _tevent_req_error (req=<optimized out>, error=<optimized out>, location=<optimized out>) at ../../tevent_req.c:211
#25 0x00007f2f717b1ec2 in _tevent_req_error (req=req@entry=0x562cff3dd1d0, error=error@entry=5, location=location@entry=0x7f2f6a1beef0 "src/providers/ldap/sdap_async.c:1948") at ../../tevent_req.c:211
#26 0x00007f2f6a1738fe in generic_ext_search_handler (subreq=0x0, opts=<optimized out>) at src/providers/ldap/sdap_async.c:1948
#27 0x00007f2f717b1ec2 in _tevent_req_error (req=req@entry=0x562cff3d76d0, error=error@entry=5, location=location@entry=0x7f2f6a1bfdf0 "src/providers/ldap/sdap_async.c:1739") at ../../tevent_req.c:211
#28 0x00007f2f6a176b62 in sdap_get_generic_op_finished (op=<optimized out>, reply=0x0, error=5, pvt=<optimized out>) at src/providers/ldap/sdap_async.c:1739
#29 0x00007f2f6a174bff in sdap_handle_release (sh=0x562cff3b4dc0) at src/providers/ldap/sdap_async.c:143
#30 sdap_process_result (ev=<optimized out>, pvt=<optimized out>) at src/providers/ldap/sdap_async.c:245
#31 0x00007f2f717b0f97 in tevent_common_invoke_fd_handler (fde=fde@entry=0x562cff3b3f20, flags=<optimized out>, removed=removed@entry=0x0) at ../../tevent_fd.c:142
#32 0x00007f2f717b77af in epoll_event_loop (tvalp=0x7ffd58ffbfe0, epoll_ev=0x562cff2da740) at ../../tevent_epoll.c:736
#33 epoll_event_loop_once (ev=<optimized out>, location=<optimized out>) at ../../tevent_epoll.c:937
#34 0x00007f2f717b579b in std_event_loop_once (ev=0x562cff2da460, location=0x7f2f7461fff4 "src/util/server.c:744") at ../../tevent_standard.c:110
#35 0x00007f2f717b0365 in _tevent_loop_once (ev=ev@entry=0x562cff2da460, location=location@entry=0x7f2f7461fff4 "src/util/server.c:744") at ../../tevent.c:790
#36 0x00007f2f717b060b in tevent_common_loop_wait (ev=0x562cff2da460, location=0x7f2f7461fff4 "src/util/server.c:744") at ../../tevent.c:913
#37 0x00007f2f717b572b in std_event_loop_wait (ev=0x562cff2da460, location=0x7f2f7461fff4 "src/util/server.c:744") at ../../tevent_standard.c:141
#38 0x00007f2f745fda37 in server_loop (main_ctx=0x562cff2da7d0) at src/util/server.c:744
#39 0x0000562cfe3b0955 in main (argc=8, argv=<optimized out>) at src/providers/data_provider_be.c:802

Do you know if there is a way to reproduce this crash on demand, or is this happening at random?

I can't trigger it on demand.  It happens consistently, a few times a day, on our DGX nodes in production, and I can reliably see it happen by running all_reduce_perf from https://github.com/NVIDIA/nccl-tests for long enough on similar nodes in our test environment.

Would you be able to use a test build with the patch and provide feedback on whether you see a drop in occurences?

(In reply to Simo Sorce from comment #6)
> Would you be able to use a test build with the patch and provide feedback on
> whether you see a drop in occurences?

yea, happy to.  Will take at least a few weeks to get everything lined back up and get dedicated time on the test nodes.

Created attachment 1968598 [details]
Bundle with cyrus-sasl test rpms

I attache dto the bug a set of test packages to try.
If they do resolve the issue I can schedule work to include this in a future RHEL update.

Stephen,
any news on this?

(In reply to Simo Sorce from comment #10)
> Stephen,
> any news on this?

sorry for the delay, I lost the test nodes to another project and am waiting for them to get rebuilt so I can use them.

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