X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/13074c982bb4830a21287a1504b0e38a953f4f74..8bd77e7098d9863f258070fb2274e324a446adbd:/io.c

diff --git a/io.c b/io.c
index 60062f90..6a91ffd5 100644
--- a/io.c
+++ b/io.c
@@ -1354,6 +1354,7 @@ int read_vstring(int f, char *buf, int bufsize)
  * called by both the sender and the receiver. */
 void read_sum_head(int f, struct sum_struct *sum)
 {
+	int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
 	sum->count = read_int(f);
 	if (sum->count < 0) {
 		rprintf(FERROR, "Invalid checksum count %ld [%s]\n",
@@ -1361,7 +1362,7 @@ void read_sum_head(int f, struct sum_struct *sum)
 		exit_cleanup(RERR_PROTOCOL);
 	}
 	sum->blength = read_int(f);
-	if (sum->blength < 0 || sum->blength > MAX_BLOCK_SIZE) {
+	if (sum->blength < 0 || sum->blength > max_blength) {
 		rprintf(FERROR, "Invalid block length %ld [%s]\n",
 			(long)sum->blength, who_am_i());
 		exit_cleanup(RERR_PROTOCOL);