tools/syz-check: check netlink policy descriptions

Overall idea of netlink checking.
Currnetly we check netlink policies for common detectable mistakes.
First, we detect what looks like a netlink policy in our descriptions
(these are structs/unions only with nlattr/nlnext/nlnetw fields).
Then we find corresponding symbols (offset/size) in vmlinux using nm.
Then we read elf headers and locate where these symbols are in the rodata section.
Then read in the symbol data, which is an array of nla_policy structs.
These structs allow to easily figure out type/size of attributes.
Finally we compare our descriptions with the kernel policy description.

Update #590

1 files changed, 1 insertions, 1 deletions

diff --git a/pkg/symbolizer/nm_test.go b/pkg/symbolizer/nm_test.go
index 44a02f3cc..6061608ec 100644
--- a/pkg/symbolizer/nm_test.go
+++ b/pkg/symbolizer/nm_test.go
@@ -8,7 +8,7 @@ import (
 )
 
 func TestSymbols(t *testing.T) {
-	symbols, err := ReadSymbols("testdata/nm.test.out")
+	symbols, err := ReadTextSymbols("testdata/nm.test.out")
 	if err != nil {
 		t.Fatalf("failed to read symbols: %v", err)
 	}