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Merge pull request #2685 from enkore/docs/i2624

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document pattern denial of service
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enkore 2017-06-17 12:37:43 +02:00 committed by GitHub
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src/borg/archiver.py
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@ -1921,6 +1921,15 @@ def do_break_lock(self, args, repository):
Other include/exclude patterns that would normally match will be ignored. Other include/exclude patterns that would normally match will be ignored.
Same logic applies for exclude. Same logic applies for exclude.
.. note::
`re:`, `sh:` and `fm:` patterns are all implemented on top of the Python SRE
engine. It is very easy to formulate patterns for each of these types which
requires an inordinate amount of time to match paths. If untrusted users
are able to supply patterns, ensure they cannot supply `re:` patterns.
Further, ensure that `sh:` and `fm:` patterns only contain a handful of
wildcards at most.
Exclusions can be passed via the command line option `--exclude`. When used Exclusions can be passed via the command line option `--exclude`. When used
from within a shell the patterns should be quoted to protect them from from within a shell the patterns should be quoted to protect them from
expansion. expansion.