[Bug runtime/16806] kernel crash during repeated module insertion

[jlebon at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=16806

Jonathan Lebon <jlebon at redhat dot com> changed:

           What    |Removed                     |Added
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   Attachment #7529|0                           |1
        is obsolete|                            |

--- Comment #5 from Jonathan Lebon <jlebon at redhat dot com> ---
Created attachment 7531
  --> https://sourceware.org/bugzilla/attachment.cgi?id=7531&action=edit
dmesg with debug flags

Note that there are multiple runs in there. The run that caused the bug starts
at 936.869106.

To reproduce:

$ stap -DDEBUG_SYMBOLS=9 -DDEBUG_TASK_FINDER=9 -DSTP_TF_DEBUG=9 --poison-cache
-p4 -m loop2_mod_verbose -e 'probe process("./loop2").function("ibar") {
println("hit"); exit() }'
loop2_mod_verbose.ko
$ 
$ staprun loop2_mod_verbose.ko -c 'timeout 0.1 ./loop2'

On average, requires about 7-8 runs before it crashes (seems like it's more
when debug flags are on).

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