Date: Fri, 10 Nov 2017 22:17:30 +0000 (UTC) From: Ed Maste <emaste@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r325683 - head/sys/dev/vnic Message-ID: <201711102217.vAAMHUJB032152@repo.freebsd.org>
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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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