update cilium/ebpf to fix haveBpfProgReplace() check

The `errors.Is(err, unix.EINVAL)` check in `haveBpfProgReplace()` was
broken because the `cilium/ebpf` library did not "wrap" errors.
https://github.com/cilium/ebpf/blob/v0.6.0/link/program.go#L72

So the eBPF support of runc was broken for kernel prior to 5.6.

This commit bumps up cilium/ebpf to contain cilium/ebpf PR 320.

Fix opencontainers/runc issue 3008

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>

vendor/github.com/cilium/ebpf/CONTRIBUTING.md

@@ -18,6 +18,23 @@ reason about the proposed changes.
 ## Running the tests
 
 Many of the tests require privileges to set resource limits and load eBPF code.
-The easiest way to obtain these is to run the tests with `sudo`:
+The easiest way to obtain these is to run the tests with `sudo`.
+
+To test the current package with your local kernel you can simply run:
+```
+go test -exec sudo  ./...
+```
+
+To test the current package with a different kernel version you can use the [run-tests.sh](run-tests.sh) script.
+It requires [virtme](https://github.com/amluto/virtme) and qemu to be installed.
+
+Examples:
+
+```bash
+# Run all tests on a 5.4 kernel
+./run-tests.sh 5.4
+
+# Run a subset of tests:
+./run-tests.sh 5.4 go test ./link
+```
 
-    sudo go test ./...

vendor/github.com/cilium/ebpf/link/kprobe.go

@@ -131,7 +131,10 @@ func kprobe(symbol string, prog *ebpf.Program, ret bool) (*perfEvent, error) {
 	}
 
 	// Use kprobe PMU if the kernel has it available.
-	tp, err := pmuKprobe(symbol, ret)
+	tp, err := pmuKprobe(platformPrefix(symbol), ret)
+	if errors.Is(err, os.ErrNotExist) {
+		tp, err = pmuKprobe(symbol, ret)
+	}
 	if err == nil {
 		return tp, nil
 	}
@@ -140,7 +143,10 @@ func kprobe(symbol string, prog *ebpf.Program, ret bool) (*perfEvent, error) {
 	}
 
 	// Use tracefs if kprobe PMU is missing.
-	tp, err = tracefsKprobe(symbol, ret)
+	tp, err = tracefsKprobe(platformPrefix(symbol), ret)
+	if errors.Is(err, os.ErrNotExist) {
+		tp, err = tracefsKprobe(symbol, ret)
+	}
 	if err != nil {
 		return nil, fmt.Errorf("creating trace event '%s' in tracefs: %w", symbol, err)
 	}

vendor/github.com/cilium/ebpf/link/platform.go

@@ -0,0 +1,25 @@
+package link
+
+import (
+	"fmt"
+	"runtime"
+)
+
+func platformPrefix(symbol string) string {
+
+	prefix := runtime.GOARCH
+
+	// per https://github.com/golang/go/blob/master/src/go/build/syslist.go
+	switch prefix {
+	case "386":
+		prefix = "ia32"
+	case "amd64", "amd64p32":
+		prefix = "x64"
+	case "arm64", "arm64be":
+		prefix = "arm64"
+	default:
+		return symbol
+	}
+
+	return fmt.Sprintf("__%s_%s", prefix, symbol)
+}

vendor/github.com/cilium/ebpf/link/program.go

@@ -43,7 +43,7 @@ func RawAttachProgram(opts RawAttachProgramOptions) error {
 	}
 
 	if err := internal.BPFProgAttach(&attr); err != nil {
-		return fmt.Errorf("can't attach program: %s", err)
+		return fmt.Errorf("can't attach program: %w", err)
 	}
 	return nil
 }
@@ -69,7 +69,7 @@ func RawDetachProgram(opts RawDetachProgramOptions) error {
 		AttachType:  uint32(opts.Attach),
 	}
 	if err := internal.BPFProgDetach(&attr); err != nil {
-		return fmt.Errorf("can't detach program: %s", err)
+		return fmt.Errorf("can't detach program: %w", err)
 	}
 
 	return nil