Date: Thu, 7 May 2020 03:22:58 +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-11@freebsd.org Subject: svn commit: r360765 - stable/11/sys/netinet Message-ID: <202005070322.0473Mwm0033319@repo.freebsd.org>
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Author: tuexen Date: Thu May 7 03:22:57 2020 New Revision: 360765 URL: https://svnweb.freebsd.org/changeset/base/360765 Log: MFC r358023: Don't use uninitialized memory 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. Submitted by: rscheff Reviewed by: Cheng Cui, rgrimes@, tuexen@ Differential Revision: https://reviews.freebsd.org/D23687 Modified: stable/11/sys/netinet/tcp_hostcache.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/netinet/tcp_hostcache.c ============================================================================== --- stable/11/sys/netinet/tcp_hostcache.c Thu May 7 03:20:01 2020 (r360764) +++ stable/11/sys/netinet/tcp_hostcache.c Thu May 7 03:22:57 2020 (r360765) @@ -435,8 +435,10 @@ 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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