Author: tuexen Date: Tue Oct 8 11:07:16 2019 New Revision: 353303 URL: https://svnweb.freebsd.org/changeset/base/353303
Log: Validate length before use it, not vice versa. r353060 should have contained this... This fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=18070 MFC after: 3 days Modified: head/sys/netinet/sctp_asconf.c Modified: head/sys/netinet/sctp_asconf.c ============================================================================== --- head/sys/netinet/sctp_asconf.c Tue Oct 8 11:06:24 2019 (r353302) +++ head/sys/netinet/sctp_asconf.c Tue Oct 8 11:07:16 2019 (r353303) @@ -334,11 +334,11 @@ sctp_process_asconf_delete_ip(struct sockaddr *src, #endif aparam_length = ntohs(aph->ph.param_length); - ph = (struct sctp_paramhdr *)(aph + 1); - param_type = ntohs(ph->param_type); if (aparam_length < sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_paramhdr)) { return (NULL); } + ph = (struct sctp_paramhdr *)(aph + 1); + param_type = ntohs(ph->param_type); #if defined(INET) || defined(INET6) param_length = ntohs(ph->param_length); if (param_length + sizeof(struct sctp_asconf_paramhdr) != aparam_length) { _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
