From 3d4a8824f8e7aafdf6c1d18822b7593fa2e3e6bb Mon Sep 17 00:00:00 2001
From: Fabricio Voznika <fvoznika@google.com>
Date: Thu, 1 Jul 2021 14:20:16 -0700
Subject: Strace: handle null paths

PiperOrigin-RevId: 382603592
---
 pkg/sentry/strace/strace.go | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'pkg/sentry')

diff --git a/pkg/sentry/strace/strace.go b/pkg/sentry/strace/strace.go
index af7088847..3ea9c31dd 100644
--- a/pkg/sentry/strace/strace.go
+++ b/pkg/sentry/strace/strace.go
@@ -133,6 +133,9 @@ func dump(t *kernel.Task, addr hostarch.Addr, size uint, maximumBlobSize uint) s
 }
 
 func path(t *kernel.Task, addr hostarch.Addr) string {
+	if addr == 0 {
+		return "<null>"
+	}
 	path, err := t.CopyInString(addr, linux.PATH_MAX)
 	if err != nil {
 		return fmt.Sprintf("%#x (error decoding path: %s)", addr, err)
-- 
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