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document pattern denial of service

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Marian Beermann 2017-06-17 11:59:56 +02:00
parent 2b13607f46
commit 1f5ddb6572
1 changed files with 9 additions and 0 deletions
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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.
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
from within a shell the patterns should be quoted to protect them from
expansion.