Prevent overflow and panic on large HTTP responses (#1351)

1 files changed, 6 insertions, 0 deletions

diff --git a/http.go b/http.go
index 0cf1bfe..cfeeac5 100644
--- a/http.go
+++ b/http.go
@@ -8,6 +8,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"math"
 	"mime/multipart"
 	"net"
 	"os"
@@ -2278,5 +2279,10 @@ func round2(n int) int {
 	x |= x >> 8
 	x |= x >> 16
 
+	// Make sure we don't return 0 due to overflow, even on 32 bit systems
+	if x >= uint32(math.MaxInt32) {
+		return math.MaxInt32
+	}
+
 	return int(x + 1)
 }