command_context: prevent unexpected tainting of mutables

Signed-off-by: Jan Pokorný <jpokorny@redhat.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/command.py b/command.py
index 92420d5..a4dadd2 100644
--- a/command.py
+++ b/command.py
@@ -381,7 +381,8 @@ class Command(object):
                     if flt.__class__.name in cmd_ctxt['filter_noop']:
                         ret = in_obj
                     else:
-                        ret = flt(in_obj, flt_ctxt)
+                        with cmd_ctxt.prevented_taint():
+                            ret = flt(in_obj, flt_ctxt)
                     flt_ctxt['out'] = ret
                 if flt not in terminals or not filter_backtrack[flt]:
                     continue