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unix: fix uint64->int cast of control message header

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Change-Id: I533233a08472b686d03573bcbae664c76919b18e
Reviewed-on: https://go-review.googlesource.com/22527
Run-TryBot: Damien Neil <dneil@google.com>
Reviewed-by: Minux Ma <minux@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Damien Neil
2016-04-27 13:13:20 -07:00
parent f64b50fbea
commit c8bc69bc2d
1 changed files with 1 additions and 1 deletions
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2
unix/sockcmsg_unix.go
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@@ -62,7 +62,7 @@ func ParseSocketControlMessage(b []byte) ([]SocketControlMessage, error) {
func socketControlMessageHeaderAndData(b []byte) (*Cmsghdr, []byte, error) {
h := (*Cmsghdr)(unsafe.Pointer(&b[0]))
if h.Len < SizeofCmsghdr || int(h.Len) > len(b) {
if h.Len < SizeofCmsghdr || uint64(h.Len) > uint64(len(b)) {
return nil, nil, EINVAL
}
return h, b[cmsgAlignOf(SizeofCmsghdr):h.Len], nil