Author: kp
Date: Tue Feb 12 21:22:57 2019
New Revision: 344061
URL: https://svnweb.freebsd.org/changeset/base/344061
Log:
garp: Fix vnet related panic for gratuitous arp
Gratuitous ARP packets are sent from a timer, which means we don't have a vnet
context set. As a result we panic trying to send the packet.
Set the vnet context based on the interface associated with the interface
address.
To reproduce:
sysctl net.link.ether.inet.garp_rexmit_count=2
ifconfig vtnet1 10.0.0.1/24 up
PR: 235699
Reviewed by: vangyzen@
MFC after: 1 week
Modified:
head/sys/netinet/if_ether.c
Modified: head/sys/netinet/if_ether.c
==============================================================================
--- head/sys/netinet/if_ether.c Tue Feb 12 21:08:44 2019 (r344060)
+++ head/sys/netinet/if_ether.c Tue Feb 12 21:22:57 2019 (r344061)
@@ -1335,6 +1335,8 @@ garp_rexmit(void *arg)
return;
}
+ CURVNET_SET(ia->ia_ifa.ifa_ifp->if_vnet);
+
/*
* Drop lock while the ARP request is generated.
*/
@@ -1362,6 +1364,8 @@ garp_rexmit(void *arg)
ifa_free(&ia->ia_ifa);
}
}
+
+ CURVNET_RESTORE();
}
/*
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