Date: Thu, 10 Sep 2020 16:47:08 +0000 (UTC) From: Michael Tuexen <tuexen@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r365587 - stable/12/sys/netinet Message-ID: <202009101647.08AGl8xV098876@repo.freebsd.org>
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Author: tuexen Date: Thu Sep 10 16:47:08 2020 New Revision: 365587 URL: https://svnweb.freebsd.org/changeset/base/365587 Log: MFC r358023: Don't use uninitialised stack memory if the sysctl variable net.inet.tcp.hostcache.enable is set to 0. The bug resulted in using possibly a too small MSS value or wrong initial retransmission timer settings. Possibly the value used for ssthresh was also wrong. Modified: stable/12/sys/netinet/tcp_hostcache.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/netinet/tcp_hostcache.c ============================================================================== --- stable/12/sys/netinet/tcp_hostcache.c Thu Sep 10 16:44:28 2020 (r365586) +++ stable/12/sys/netinet/tcp_hostcache.c Thu Sep 10 16:47:08 2020 (r365587) @@ -437,8 +437,10 @@ tcp_hc_get(struct in_conninfo *inc, struct hc_metrics_ { struct hc_metrics *hc_entry; - if (!V_tcp_use_hostcache) + if (!V_tcp_use_hostcache) { + bzero(hc_metrics_lite, sizeof(*hc_metrics_lite)); return; + } /* * Find the right bucket.
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