From fc8c7dc1b29560c016a67a34ccff32a712b5aa86 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Wed, 14 Jan 2009 14:55:35 -0800 Subject: [PATCH] xfrm: For 32/64 compatability wrt. xfrm_usersa_info Reported by Jiri Klimes. Fix suggested by Patrick McHardy. Signed-off-by: David S. Miller --- net/xfrm/xfrm_user.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index b95a2d64eb59..7877e7975dae 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -1914,10 +1914,17 @@ static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, } #endif +/* For the xfrm_usersa_info cases we have to work around some 32-bit vs. + * 64-bit compatability issues. On 32-bit the structure is 220 bytes, but + * for 64-bit it gets padded out to 224 bytes. Those bytes are just + * padding and don't have any content we care about. Therefore as long + * as we have enough bytes for the content we can make both cases work. + */ + #define XMSGSIZE(type) sizeof(struct type) static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { - [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), + [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = 220, /* see above */ [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), @@ -1927,7 +1934,7 @@ static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), - [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), + [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = 220, /* see above */ [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, -- 2.20.1