Author: adrian
Date: Wed May 27 01:56:37 2009
New Revision: 192870
URL: http://svn.freebsd.org/changeset/base/192870
Log:
Do the invariant check before the mbuf is dereferenced.
Modified:
head/sys/dev/xen/netfront/netfront.c
Modified: head/sys/dev/xen/netfront/netfront.c
==============================================================================
--- head/sys/dev/xen/netfront/netfront.c Wed May 27 01:54:26 2009
(r192869)
+++ head/sys/dev/xen/netfront/netfront.c Wed May 27 01:56:37 2009
(r192870)
@@ -1065,6 +1065,8 @@ xn_txeof(struct netfront_info *np)
id = txr->id;
m = np->xn_cdata.xn_tx_chain[id];
+ KASSERT(m != NULL, ("mbuf not found in xn_tx_chain"));
+ M_ASSERTVALID(m);
/*
* Increment packet count if this is the last
@@ -1072,8 +1074,6 @@ xn_txeof(struct netfront_info *np)
*/
if (!m->m_next)
ifp->if_opackets++;
- KASSERT(m != NULL, ("mbuf not found in xn_tx_chain"));
- M_ASSERTVALID(m);
if (unlikely(gnttab_query_foreign_access(
np->grant_tx_ref[id]) != 0)) {
printf("network_tx_buf_gc: warning "
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