From: Thomas Graf <tgraf@suug.ch>
Date: Tue, 3 May 2005 21:26:01 +0000 (-0700)
Subject: [XFRM]: Prevent off-by-one access to xfrm_dispatch
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=526bdb80a23b2e10ed4ccc3fcf309c9118d892d6;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[XFRM]: Prevent off-by-one access to xfrm_dispatch

Makes the type > XFRM_MSG_MAX check behave correctly to
protect access to xfrm_dispatch.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/include/linux/xfrm.h b/include/linux/xfrm.h
index f0df02ae68a4..4d19b9e65317 100644
--- a/include/linux/xfrm.h
+++ b/include/linux/xfrm.h
@@ -140,8 +140,9 @@ enum {
 	XFRM_MSG_FLUSHPOLICY,
 #define XFRM_MSG_FLUSHPOLICY XFRM_MSG_FLUSHPOLICY
 
-	XFRM_MSG_MAX
+	__XFRM_MSG_MAX
 };
+#define XFRM_MSG_MAX (__XFRM_MSG_MAX - 1)
 
 struct xfrm_user_tmpl {
 	struct xfrm_id		id;