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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2019-04-25 10:19:52 +0100 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2022-05-02 14:27:21 +0300 |
| commit | d143c0054a021a5b9ee2b91f739a09a6944283b6 (patch) | |
| tree | 9244bb65be63b8b4c249ab90646e784efbf67ee8 /tools/perf/scripts/python/stackcollapse.py | |
| parent | c140915c00c92e3ca2a4f8e5748f0b9ef3e5a418 (diff) | |
lockdep: Swap storage for pin_count and references
As a lockmap takes a reference for every ww_mutex used together, this
can be an arbitrarily large number and under control of userspace --
easily overflowing the arbitrary limit of 4096. However, the pin_count
(used for detecting unexpected lock dropping) is a full 32b despite
nesting being extremely rare (see lockdep_pin_lock).
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190425092004.9995-33-chris@chris-wilson.co.uk
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions