This sort of thing can happen if the installed and running copies of the binaries are different, such as during a dnf upgrade, or perhaps during mismatches between containerized and host software versions.  Perhaps the change occurred across a stap module compilation / run cycle.

In case it is the last problem, try:

# stap --poison-cache [...]

By the way, can you share the contents of the /root/.systemtap/cache/7e/stap_7edbe3badfbf0f26279da1ce235*hash.log file?

Hi Frank,

Thanks for your update and info as listed below.
~~~

# cat /root/.systemtap/cache/7e/stap_7edbe3badfbf0f26279da1ce235*hash.log
[Tue Aug 15 10:08:02 2023] script_hash:
Systemtap version: 4.7/0.187/0.186, rpm 4.7-1.el8
Kernel Release: 4.18.0-425.13.1.el8_7.x86_64
Kernel Build Tree Path: /lib/modules/4.18.0-425.13.1.el8_7.x86_64/build
Kernel Build Tree Size: 4096
Kernel Build Tree Timestamp: 1677588474
Architecture: x86_64
Kernel Build Tree .config Path: /lib/modules/4.18.0-425.13.1.el8_7.x86_64/build/.config
Kernel Build Tree .config Size: 198608
Kernel Build Tree .config Timestamp: 1675361720
Kernel Build Tree .version Path: /lib/modules/4.18.0-425.13.1.el8_7.x86_64/build/.version
Kernel Build Tree .version Size: -1
Kernel Build Tree .version Timestamp: -1
Kernel Build Tree compile.h Path: /lib/modules/4.18.0-425.13.1.el8_7.x86_64/build/include/linux/compile.h
Kernel Build Tree compile.h Size: -1
Kernel Build Tree compile.h Timestamp: -1
Kernel Build Tree version.h Path: /lib/modules/4.18.0-425.13.1.el8_7.x86_64/build/include/linux/version.h
Kernel Build Tree version.h Size: -1
Kernel Build Tree version.h Timestamp: -1
Kernel Build Tree utsrelease.h Path: /lib/modules/4.18.0-425.13.1.el8_7.x86_64/build/include/linux/utsrelease.h
Kernel Build Tree utsrelease.h Size: -1
Kernel Build Tree utsrelease.h Timestamp: -1
Guru mode 1
Runtime Path: /usr/share/systemtap/runtime
Runtime Size: 4096
Runtime Timestamp: 1668568962
Runtime transport Path: /usr/share/systemtap/runtime/transport
Runtime transport Size: 192
Runtime transport Timestamp: 1668568962
Runtime unwind Path: /usr/share/systemtap/runtime/unwind
Runtime unwind Size: 139
Runtime unwind Timestamp: 1668568962
Runtime sub Path: /usr/share/systemtap/runtime/linux
Runtime sub Size: 8192
Runtime sub Timestamp: 1668568962
Compiler Path: /usr/bin/gcc
Compiler Size: 1266664
Compiler Timestamp: 1658333104
Systemtap Path: /usr/bin/stap
Systemtap Size: 3860344
Systemtap Timestamp: 1651514709
UID: 0
Bulk Mode (-b): 0
Timing (-t): 0
Skip Badvars (--skip-badvars): 0
Privilege (--privilege): 8
Compatible (--compatible): 4.7
Error suppression (--suppress-handler-errors): 0
Suppress Time Limits (--suppress-time-limits): 0
Prologue Searching (--prologue-searching[=WHEN]): 1
Unwindsym Modules Path: /lib/modules/4.18.0-425.13.1.el8_7.x86_64/vdso/vdso32.so
Unwindsym Modules Size: 5492
Unwindsym Modules Timestamp: 1675362002
Unwindsym Modules Path: /lib/modules/4.18.0-425.13.1.el8_7.x86_64/vdso/vdso64.so
Unwindsym Modules Size: 5232
Unwindsym Modules Timestamp: 1675362003
Unwindsym Modules Path: /usr/lib64/libsystemd.so.0.23.0
Unwindsym Modules Size: 1383536
Unwindsym Modules Timestamp: 1664264120
Build ID: 2cc229fa40c8781cf10c5d5f692e5bfba709fa64
Script:
# functions
exit:unknown ()
{ %{ /* unprivileged */
   atomic_set (session_state(), STAP_SESSION_STOPPING);
   _stp_exit ();
%} }
print_ubacktrace:unknown ()
{ %{ /* pragma:unwind */ /* pragma:symbols */
/* myproc-unprivileged */ /* pragma:uprobes */ /* pragma:vma */
    _stp_stack_user_print(CONTEXT, _STP_SYM_FULL);
%} }
# probes
process("/usr/lib64/libsystemd.so.0.23.0").function("sd_bus_open_system@../src/libsystemd/sd-bus/sd-bus.c:1293") /* pc=.dynamic+0x52a50 */ /* <- process("/usr/lib64/libsystemd.so.0.23.0").function("sd_bus_open_system@../src/libsystemd/sd-bus/sd-bus.c:1293") */
{ {
print_ubacktrace();
exit();
} }


result:7edbe3badfbf0f26279da1ce235c1724_1672
~~~
Regards
Sam

The build-id for that particular version of systemd-libs matches up with the 2cc229fa40c8781cf10c5d5f692e5bfba709fa64 reported as the hexstring_theory.  It appears that the checking might be getting some bogus build-id value for the hexstring_practice.  This results in the following printing the warning message:

https://sourceware.org/git/?p=systemtap.git;a=blob;f=runtime/sym.c;h=f5c52d6d4bb21b3d8ce9e8edcd348ac9596f643a;hb=HEAD#l729

However, I haven't been able to replicate the issue despite using identical kernel and systemd* rpms.  The only difference between the *_hash.log in the comment above and the one generated during the experiments are the lines with "*Timestap: *" and the "results:*" last line.

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