ERROR: The effective user ID of staprun must be set to the root user.

[Frank Ch. Eigler]

Jim Keniston <jkenisto@us.ibm.com> writes:

> [...]
> Pass 5: starting run.
> Error inserting module
> '/tmp/stapiMOfTu/stap_3ef244575eb0700481e9d673c7d9d914_354.ko': File
> exists
> Retrying, after attempted removal of module
> stap_3ef244575eb0700481e9d673c7d9d914_354 (rc 0)

This suggests that the module was left in memory after a previous run,
as if "staprun -d" failed.

> ERROR: The effective user ID of staprun must be set to the root user.
>   Check permissions on staprun and ensure it is a setuid root program.

According to the source code, this comes from a specific check
upon geteuid() != 0.  So the setuid mechanism may be defeated
somehow - perhaps /usr/local is mounted nosuid?

> Pass 5: run completed in 10usr/0sys/162real ms.
> Pass 5: run failed.  Try again with another '--vp 00001' option.
> [...]
> [jimk@xxx stap]$ lsmod | grep stap
> stap_3ef244575eb0700481e9d673c7d9d914_354    27240  0 
> stap_7f0af3bd64bc4349367c78489e1f6351_98711   164088  0 

This suggests that the same condition.


- FChE