From 354562ca60b80b351e8d4bddd772929a14efdfcc Mon Sep 17 00:00:00 2001
From: jacob <jacob@cda61777-01e9-0310-a592-d414129be87e>
Date: Tue, 1 Mar 2011 23:44:06 +0000
Subject: [PATCH] Add some extra validation to zlib decompression (primarily to
 shut up a GCC 4.6 warning).

git-svn-id: svn://svn.tartarus.org/sgt/putty@9113 cda61777-01e9-0310-a592-d414129be87e
---
 sshzlib.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sshzlib.c b/sshzlib.c
index 9c801325..cc287240 100644
--- a/sshzlib.c
+++ b/sshzlib.c
@@ -1259,6 +1259,8 @@ int zlib_decompress_block(void *handle, unsigned char *block, int len,
 		goto finished;
 	    nlen = dctx->bits & 0xFFFF;
 	    EATBITS(16);
+	    if (dctx->uncomplen != (nlen ^ 0xFFFF))
+		goto decode_error;
 	    if (dctx->uncomplen == 0)
 		dctx->state = OUTSIDEBLK;	/* block is empty */
 	    else
-- 
2.11.0