Re: [PATCH v2 0/2] selftests/ftrace: Fix add_remove_uprobe robustness

On Fri,  7 Aug 2026 16:15:10 +0800
"Rui Qi" <[email protected]> wrote:

> Hi,
> 
> This series fixes two ways add_remove_uprobe can construct an invalid
> uprobe offset.

Please send the series in the new thread (not reply) next time.
Instead, you can make a permalink to the previous discussion from your
mail's message-id and write it in the mail body so that we can follow
the discussion in the previous version.

e.g. 

 https://lore.kernel.org/all/[email protected]/

You can get this using below script.
-----
#!/bin/sh
#
if [ -f "$1" ]; then
  MID=`grep -i ^"Message-Id:" $1 | cut -f2 -d: | tr -d ' <>'`
else
  MID=$1
fi

URL=`curl -Ls -o /dev/null -w %{url_effective} http://lkml.kernel.org/r/$MID`
echo ${URL%T/#u}
-----

Thank you,

> 
> Patch 1 follows Masami's feedback on v1 and forces the C locale in the
> top-level ftracetest runner, rather than setting LC_ALL=C around each
> readelf invocation.
> 
> Patch 2 fixes the remaining offset issue. readelf reports the ELF entry
> point as a virtual address, while uprobe_events expects a file offset.
> Convert the entry point through the LOAD program headers so the test also
> works for non-PIE executables.
> 
> Changes in v2:
> - Move LC_ALL=C to the top-level ftracetest runner, as suggested by
>   Masami.
> - Keep the entry-point-to-file-offset conversion as the second patch and
>   rely on the runner-provided locale for readelf output.
> 
> Testing:
> - ./scripts/checkpatch.pl --strict -g HEAD~2..HEAD
> - sh -n tools/testing/selftests/ftrace/ftracetest
> - sh -n tools/testing/selftests/ftrace/test.d/dynevent/add_remove_uprobe.tc
> 
> Rui Qi (2):
>   selftests/ftrace: Force C locale in ftracetest
>   selftests/ftrace: Convert ELF entry point to file offset in uprobe
>     test
> 
>  tools/testing/selftests/ftrace/ftracetest     |  3 +++
>  .../test.d/dynevent/add_remove_uprobe.tc      | 27 +++++++++++++++++--
>  2 files changed, 28 insertions(+), 2 deletions(-)
> 
> -- 
> 2.20.1
> 


-- 
Masami Hiramatsu (Google) <[email protected]>