tracing: fprobe: Protect return handler from recursion loop

[PATCH v2 0/2] tracing: fprobe: Protect return handler from recursion loop

Masami Hiramatsu (Google) posted 2 patches 1 week, 2 days ago

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kernel/trace/fgraph.c   |   12 ++++++
lib/tests/test_fprobe.c |   92 ++++++++++++++++++++++++++++++++++++++++++++++-
2 files changed, 102 insertions(+), 2 deletions(-)

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[PATCH v2 0/2] tracing: fprobe: Protect return handler from recursion loop

Posted by Masami Hiramatsu (Google) 1 week, 2 days ago

The following series fixes a recursive loop issue on fprobe by adding
ftrace_test_recursion_trylock() in __ftrace_return_to_handler().
The previous version is here;

https://lore.kernel.org/all/175828305637.117978.4183947592750468265.stgit@devnote2/

This v2 removes WARN_ON from __ftrace_return_to_handler() and adds
kunit test cases for recursive call [2/2]. 

---

Masami Hiramatsu (Google) (2):
      tracing: fgraph: Protect return handler from recursion loop
      lib/test_fprobe: Add recursion check test cases


 kernel/trace/fgraph.c   |   12 ++++++
 lib/tests/test_fprobe.c |   92 ++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 102 insertions(+), 2 deletions(-)

--
Masami Hiramatsu (Google) <mhiramat@kernel.org>