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Fix a NULL pointer dereference of ro->ro_rt->rt_flags by checking for the

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validity of ro->ro_rt first.  This prevents crashing on any non-normally
routed IP packet.

Coverity CID:	162 (incorrectly, it was re-introduced by previous commit)
This commit is contained in:
andre 2006-09-11 19:56:10 +00:00
parent 320be4d762
commit c4015db86a
1 changed files with 1 additions and 1 deletions
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2
sys/netinet/ip_output.c
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@ -246,7 +246,7 @@ ip_output(struct mbuf *m, struct mbuf *opt, struct route *ro,
* Calculate MTU. If we have a route that is up, use that,
* otherwise use the interface's MTU.
*/
if (ro->ro_rt->rt_flags & (RTF_UP | RTF_HOST)) {
if (ro->ro_rt != NULL && (ro->ro_rt->rt_flags & (RTF_UP|RTF_HOST))) {
/*
* This case can happen if the user changed the MTU
* of an interface after enabling IP on it. Because