Author: emaste
Date: Fri Nov 10 22:17:30 2017
New Revision: 325683
URL: https://svnweb.freebsd.org/changeset/base/325683
Log:
vnic: apply BPF tap before passing packet to hardware
Previously we passed tx packets to hardware via nicvf_tx_mbuf_locked
and then to the BPF tap, with a possibly invalid mbuf which would result
in a panic.
PR: 223600
Discussed with: bz
MFC after: 1 week
Sponsored by: The FreeBSD Foundation, Packet.net (hardware)
Modified:
head/sys/dev/vnic/nicvf_queues.c
Modified: head/sys/dev/vnic/nicvf_queues.c
==============================================================================
--- head/sys/dev/vnic/nicvf_queues.c Fri Nov 10 21:52:33 2017
(r325682)
+++ head/sys/dev/vnic/nicvf_queues.c Fri Nov 10 22:17:30 2017
(r325683)
@@ -992,6 +992,9 @@ nicvf_xmit_locked(struct snd_queue *sq)
err = 0;
while ((next = drbr_peek(ifp, sq->br)) != NULL) {
+ /* Send a copy of the frame to the BPF listener */
+ ETHER_BPF_MTAP(ifp, next);
+
err = nicvf_tx_mbuf_locked(sq, &next);
if (err != 0) {
if (next == NULL)
@@ -1002,8 +1005,6 @@ nicvf_xmit_locked(struct snd_queue *sq)
break;
}
drbr_advance(ifp, sq->br);
- /* Send a copy of the frame to the BPF listener */
- ETHER_BPF_MTAP(ifp, next);
}
return (err);
}
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