From: Wayne Davison <wayned@samba.org>
Date: Sat, 21 Aug 2010 18:26:21 +0000 (-0700)
Subject: Avoid infinite loop if the file's length is negative.
X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/commitdiff_plain/929002a2d5e6491c63877836deb67834f87918f7

Avoid infinite loop if the file's length is negative.
Fixes bug 4664.
---

diff --git a/generator.c b/generator.c
index 01398b58..b12087fc 100644
--- a/generator.c
+++ b/generator.c
@@ -567,6 +567,12 @@ static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 	int s2length;
 	int64 l;
 
+	if (len < 0) {
+		/* The file length overflowed our int64 var, so we can't process this file. */
+		sum->count = -1; /* indicate overflow error */
+		return;
+	}
+
 	if (block_size)
 		blength = block_size;
 	else if (len <= BLOCK_SIZE * BLOCK_SIZE)