From 3a343be4af262744f1a86edd8c20b8098c443e8a Mon Sep 17 00:00:00 2001
From: "Alexis (Poliorcetics) Bourget" <ab_github@poliorcetiq.eu>
Date: Mon, 24 Jul 2023 11:30:31 +0200
Subject: [PATCH] feat(tonic): Add limitation on body length

---
 tonic/src/codec/decode.rs | 7 ++++++-
 tonic/src/codec/mod.rs    | 2 +-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/tonic/src/codec/decode.rs b/tonic/src/codec/decode.rs
index b6d24f530..f008a49f4 100644
--- a/tonic/src/codec/decode.rs
+++ b/tonic/src/codec/decode.rs
@@ -187,7 +187,12 @@ impl StreamingInner {
                 ));
             }
 
-            self.buf.reserve(len);
+            if let Err(err) = self.buf.try_reserve(len) {
+                return Err(Status::internal(format!(
+                    "Could not allocate buffer (needed size: {}): {}",
+                    len, err
+                )));
+            }
 
             self.state = State::ReadBody {
                 compression: compression_encoding,
diff --git a/tonic/src/codec/mod.rs b/tonic/src/codec/mod.rs
index 306621329..69cdaebad 100644
--- a/tonic/src/codec/mod.rs
+++ b/tonic/src/codec/mod.rs
@@ -30,7 +30,7 @@ const HEADER_SIZE: usize =
     std::mem::size_of::<u32>();
 
 // The default maximum uncompressed size in bytes for a message. Defaults to 4MB.
-const DEFAULT_MAX_RECV_MESSAGE_SIZE: usize = 4 * 1024 * 1024;
+const DEFAULT_MAX_RECV_MESSAGE_SIZE: usize = 100 * 1024 * 1024;
 const DEFAULT_MAX_SEND_MESSAGE_SIZE: usize = usize::MAX;
 
 /// Trait that knows how to encode and decode gRPC messages.