From 1da9ffe39496e59f439b126a232b7ae18a634aee Mon Sep 17 00:00:00 2001
From: Felix Jendrusch <felix@felixjendrusch.is>
Date: Thu, 8 Mar 2018 16:20:37 +0100
Subject: [PATCH] Check return value on write of raw pointer

---
 objectivec/GPBCodedOutputStream.m | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/objectivec/GPBCodedOutputStream.m b/objectivec/GPBCodedOutputStream.m
index f832e8a6f..b846c2fc9 100644
--- a/objectivec/GPBCodedOutputStream.m
+++ b/objectivec/GPBCodedOutputStream.m
@@ -942,7 +942,10 @@ static void GPBWriteRawLittleEndian64(GPBOutputBufferState *state,
       state_.position = length;
     } else {
       // Write is very big.  Let's do it all at once.
-      [state_.output write:((uint8_t *)value) + offset maxLength:length];
+      NSInteger written = [state_.output write:((uint8_t *)value) + offset maxLength:length];
+      if (written != (NSInteger)length) {
+        [NSException raise:GPBCodedOutputStreamException_WriteFailed format:@""];
+      }
     }
   }
 }