From: David S. Miller <davem@davemloft.net>
Date: Tue, 21 Mar 2006 06:23:35 +0000 (-0800)
Subject: [IPSEC] xfrm_user: Kill PAGE_SIZE check in verify_sec_ctx_len()
X-Git-Tag: v2.6.17-rc1~1175^2~89
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=253aa11578c1b89757282430891bb66ae5300092;p=linux-2.6

[IPSEC] xfrm_user: Kill PAGE_SIZE check in verify_sec_ctx_len()

First, it warns when PAGE_SIZE >= 64K because the ctx_len
field is 16-bits.

Secondly, if there are any real length limitations it can
be verified by the security layer security_xfrm_state_alloc()
call.

Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 07b71680cd..7b1acd9951 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -101,9 +101,6 @@ static inline int verify_sec_ctx_len(struct rtattr **xfrma)
 
 	uctx = RTA_DATA(rt);
 
-	if (uctx->ctx_len > PAGE_SIZE)
-		return -EINVAL;
-
 	len += sizeof(struct xfrm_user_sec_ctx);
 	len += uctx->ctx_len;