diff options
| author | Dmitry Vyukov <dvyukov@google.com> | 2021-10-05 11:09:48 +0200 |
|---|---|---|
| committer | Dmitry Vyukov <dvyukov@google.com> | 2021-10-05 15:45:04 +0200 |
| commit | d9ffc81421c7dcf20d88106c5dca34ec35cb610a (patch) | |
| tree | b3db9dc55acbfd6f175d87718a7159bb72002c52 /pkg/compiler/compiler_test.go | |
| parent | 8a6b1a8da46b1f7e601339d52caa0fbb0bcdd490 (diff) | |
pkg/compiler: fix infinite recursion in template instantiation
Fix a bug found by OSS-Fuzz:
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=17240
We handled the case of infinite recursion in templates
but only if the full type name matches precisely (A -> B -> A).
In this case the name constantly changes due to different
template arguments. Per se this is a not an error
(and we have real cases that use this, e.g. when an nlattr_t
contains nested nlattr_t's), but it's an error if it recurses
infinitely. Restrict recursion on the same template to 10 levels.
Diffstat (limited to 'pkg/compiler/compiler_test.go')
| -rw-r--r-- | pkg/compiler/compiler_test.go | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/pkg/compiler/compiler_test.go b/pkg/compiler/compiler_test.go index 131270939..8045bf608 100644 --- a/pkg/compiler/compiler_test.go +++ b/pkg/compiler/compiler_test.go @@ -135,6 +135,15 @@ func TestData(t *testing.T) { func TestFuzz(t *testing.T) { t.Parallel() for _, data := range []string{ + ` +type p b[L] +type b[L]{ + e b[3:L] + e b[2:L] + e b[1[L]] + k b[H] + k b[Q] +}`, "d~^gB̉`i\u007f?\xb0.", "da[", "define\x98define(define\x98define\x98define\x98define\x98define)define\tdefin", |