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From: VANHULLEBUS Yvan <vanhu@FreeBSD.org>
Date: Mon, 17 May 2010 15:31:24 +0000 (UTC)
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Subject: svn commit: r208194 - stable/8/sys/netipsec
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Author: vanhu
Date: Mon May 17 15:31:24 2010
New Revision: 208194
URL: http://svn.freebsd.org/changeset/base/208194

Log:
  MFC: Locks SPTREE when setting some SP entries to state DEAD.
  This can prevent kernel panics when updating SPs while there is
  some traffic for them.
  
  Obtained from:	NETASQ

Modified:
  stable/8/sys/netipsec/key.c
Directory Properties:
  stable/8/sys/   (props changed)
  stable/8/sys/amd64/include/xen/   (props changed)
  stable/8/sys/cddl/contrib/opensolaris/   (props changed)
  stable/8/sys/contrib/dev/acpica/   (props changed)
  stable/8/sys/contrib/pf/   (props changed)
  stable/8/sys/dev/xen/xenpci/   (props changed)
  stable/8/sys/geom/sched/   (props changed)

Modified: stable/8/sys/netipsec/key.c
==============================================================================
--- stable/8/sys/netipsec/key.c	Mon May 17 14:27:40 2010	(r208193)
+++ stable/8/sys/netipsec/key.c	Mon May 17 15:31:24 2010	(r208194)
@@ -1882,7 +1882,9 @@ key_spdadd(so, m, mhp)
 	newsp = key_getsp(&spidx);
 	if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
 		if (newsp) {
+			SPTREE_LOCK();
 			newsp->state = IPSEC_SPSTATE_DEAD;
+			SPTREE_UNLOCK();
 			KEY_FREESP(&newsp);
 		}
 	} else {
@@ -2127,7 +2129,9 @@ key_spddelete(so, m, mhp)
 	/* save policy id to buffer to be returned. */
 	xpl0->sadb_x_policy_id = sp->id;
 
+	SPTREE_LOCK();
 	sp->state = IPSEC_SPSTATE_DEAD;
+	SPTREE_UNLOCK();
 	KEY_FREESP(&sp);
 
     {
@@ -2194,7 +2198,9 @@ key_spddelete2(so, m, mhp)
 		return key_senderror(so, m, EINVAL);
 	}
 
+	SPTREE_LOCK();
 	sp->state = IPSEC_SPSTATE_DEAD;
+	SPTREE_UNLOCK();
 	KEY_FREESP(&sp);
 
     {