tests: test the bpf accumulator checking logic

When building the BPF filter code we need to ensure that we take the
state of the BPF state machine accumulator into account.  This test
creates a situation where the BPF filter code generator needs to
perform some extra work to ensure the accumulator state is correct.

This test is based on a bug reproducer by Matthew Heon.

Signed-off-by: Paul Moore <pmoore@redhat.com>

1 files changed, 53 insertions, 0 deletions

diff --git a/tests/27-sim-bpf_blk_state.py b/tests/27-sim-bpf_blk_state.py
new file mode 100755
index 0000000..647c549
--- /dev/null
+++ b/tests/27-sim-bpf_blk_state.py
@@ -0,0 +1,53 @@
+#!/usr/bin/env python
+
+#
+# Seccomp Library test program
+#
+# Copyright (c) 2015 Red Hat <pmoore@redhat.com>
+# Author: Paul Moore <pmoore@redhat.com>
+#
+
+#
+# This library is free software; you can redistribute it and/or modify it
+# under the terms of version 2.1 of the GNU Lesser General Public License as
+# published by the Free Software Foundation.
+#
+# This library is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+# for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this library; if not, see <http://www.gnu.org/licenses>.
+#
+
+import argparse
+import sys
+
+import util
+
+from seccomp import *
+
+def test(args):
+    f = SyscallFilter(ALLOW)
+    f.add_rule_exactly(KILL, "socket", Arg(0, EQ, 3))
+    f.add_rule_exactly(KILL, "socket", Arg(0, EQ, 4))
+    f.add_rule_exactly(KILL, "socket", Arg(0, EQ, 5))
+    f.add_rule_exactly(KILL, "socket", Arg(0, EQ, 6))
+    f.add_rule_exactly(KILL, "socket", Arg(0, EQ, 7))
+    f.add_rule_exactly(KILL, "socket", Arg(0, EQ, 8))
+    f.add_rule_exactly(KILL, "socket", Arg(0, EQ, 9))
+    f.add_rule_exactly(KILL, "socket", Arg(0, EQ, 11))
+    f.add_rule_exactly(KILL, "socket", Arg(0, EQ, 12))
+    f.add_rule_exactly(KILL, "socket", Arg(0, EQ, 13))
+    f.add_rule_exactly(KILL, "socket", Arg(0, EQ, 14))
+    f.add_rule_exactly(KILL, "socket", Arg(0, EQ, 15))
+    f.add_rule_exactly(KILL, "socket", Arg(0, GE, 16))
+    return f
+
+args = util.get_opt()
+ctx = test(args)
+util.filter_output(args, ctx)
+
+# kate: syntax python;
+# kate: indent-mode python; space-indent on; indent-width 4; mixedindent off;