diff --git a/fail2ban/helpers.py b/fail2ban/helpers.py index 3ef7d543..dc7852ae 100644 --- a/fail2ban/helpers.py +++ b/fail2ban/helpers.py @@ -398,8 +398,8 @@ def splitWithOptions(option): # tags () in tagged options. # -# max tag replacement count: -MAX_TAG_REPLACE_COUNT = 10 +# max tag replacement count (considering tag X in tag Y repeat): +MAX_TAG_REPLACE_COUNT = 25 # compiled RE for tag name (replacement name) TAG_CRE = re.compile(r'<([^ <>]+)>') @@ -433,6 +433,7 @@ def substituteRecursiveTags(inptags, conditional='', done = set() noRecRepl = hasattr(tags, "getRawItem") # repeat substitution while embedded-recursive (repFlag is True) + repCounts = {} while True: repFlag = False # substitute each value: @@ -444,7 +445,7 @@ def substituteRecursiveTags(inptags, conditional='', value = orgval = uni_string(tags[tag]) # search and replace all tags within value, that can be interpolated using other tags: m = tre_search(value) - refCounts = {} + rplc = repCounts.get(tag, {}) #logSys.log(5, 'TAG: %s, value: %s' % (tag, value)) while m: # found replacement tag: @@ -454,13 +455,13 @@ def substituteRecursiveTags(inptags, conditional='', m = tre_search(value, m.end()) continue #logSys.log(5, 'found: %s' % rtag) - if rtag == tag or refCounts.get(rtag, 1) > MAX_TAG_REPLACE_COUNT: + if rtag == tag or rplc.get(rtag, 1) > MAX_TAG_REPLACE_COUNT: # recursive definitions are bad #logSys.log(5, 'recursion fail tag: %s value: %s' % (tag, value) ) raise ValueError( "properties contain self referencing definitions " "and cannot be resolved, fail tag: %s, found: %s in %s, value: %s" % - (tag, rtag, refCounts, value)) + (tag, rtag, rplc, value)) repl = None if conditional: repl = tags.get(rtag + '?' + conditional) @@ -480,7 +481,7 @@ def substituteRecursiveTags(inptags, conditional='', value = value.replace('<%s>' % rtag, repl) #logSys.log(5, 'value now: %s' % value) # increment reference count: - refCounts[rtag] = refCounts.get(rtag, 0) + 1 + rplc[rtag] = rplc.get(rtag, 0) + 1 # the next match for replace: m = tre_search(value, m.start()) #logSys.log(5, 'TAG: %s, newvalue: %s' % (tag, value)) @@ -488,6 +489,7 @@ def substituteRecursiveTags(inptags, conditional='', if orgval != value: # check still contains any tag - should be repeated (possible embedded-recursive substitution): if tre_search(value): + repCounts[tag] = rplc repFlag = True # copy return tags dict to prevent modifying of inptags: if id(tags) == id(inptags): diff --git a/fail2ban/tests/actiontestcase.py b/fail2ban/tests/actiontestcase.py index 3425667c..125706af 100644 --- a/fail2ban/tests/actiontestcase.py +++ b/fail2ban/tests/actiontestcase.py @@ -252,7 +252,7 @@ class CommandActionTest(LogCaptureTestCase): delattr(self.__action, 'ac') # produce self-referencing query except: self.assertRaisesRegexp(ValueError, r"possible self referencing definitions in query", - lambda: self.__action.replaceTag(">>>>>>>>>>>>>>>>>>>>", + lambda: self.__action.replaceTag(""*30, self.__action._properties, conditional="family=inet6") )