From c876dda6d0c85665ed7e91ea2936f37764cb63fe Mon Sep 17 00:00:00 2001
From: Sean McArthur <sean@seanmonstar.com>
Date: Thu, 9 Dec 2021 14:21:20 -0800
Subject: [PATCH] Fix panic when receiving malformed push promise with stream
 id 0

---
 src/frame/headers.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/frame/headers.rs b/src/frame/headers.rs
index 05d7723..bcb9050 100644
--- a/src/frame/headers.rs
+++ b/src/frame/headers.rs
@@ -400,6 +400,10 @@ impl PushPromise {
         let flags = PushPromiseFlag(head.flag());
         let mut pad = 0;
 
+        if head.stream_id().is_zero() {
+            return Err(Error::InvalidStreamId);
+        }
+
         // Read the padding length
         if flags.is_padded() {
             if src.is_empty() {