Date: Thu, 8 Mar 2012 09:20:01 +0000 (UTC) From: Gleb Smirnoff <glebius@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r232685 - head/sys/contrib/pf/net Message-ID: <201203080920.q289K10S035203@svn.freebsd.org>
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Author: glebius Date: Thu Mar 8 09:20:00 2012 New Revision: 232685 URL: http://svn.freebsd.org/changeset/base/232685 Log: Merge from OpenBSD: revision 1.146 date: 2010/05/12 08:11:11; author: claudio; state: Exp; lines: +2 -3 bzero() the full compressed update struct before setting the values. This is needed because pf_state_peer_hton() skips some fields in certain situations which could result in garbage beeing sent to the other peer. This seems to fix the pfsync storms seen by stephan@ and so dlg owes me a whiskey. I didn't see any storms, but this definitely fixes a useless memory allocation on the receiving side, due to non zero scrub_flags field in a pfsync_state_peer structure. Modified: head/sys/contrib/pf/net/if_pfsync.c Modified: head/sys/contrib/pf/net/if_pfsync.c ============================================================================== --- head/sys/contrib/pf/net/if_pfsync.c Thu Mar 8 07:22:41 2012 (r232684) +++ head/sys/contrib/pf/net/if_pfsync.c Thu Mar 8 09:20:00 2012 (r232685) @@ -48,6 +48,7 @@ * 1.120, 1.175 - use monotonic time_uptime * 1.122 - reduce number of updates for non-TCP sessions * 1.128 - cleanups + * 1.146 - bzero() mbuf before sparsely filling it with data * 1.170 - SIOCSIFMTU checks */ @@ -2011,6 +2012,7 @@ pfsync_out_upd_c(struct pf_state *st, st { struct pfsync_upd_c *up = (struct pfsync_upd_c *)(m->m_data + offset); + bzero(up, sizeof(*up)); up->id = st->id; pf_state_peer_hton(&st->src, &up->src); pf_state_peer_hton(&st->dst, &up->dst); @@ -2023,8 +2025,6 @@ pfsync_out_upd_c(struct pf_state *st, st up->expire = htonl(up->expire - time_second); up->timeout = st->timeout; - bzero(up->_pad, sizeof(up->_pad)); /* XXX */ - return (sizeof(*up)); }
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