Date: Tue, 27 Aug 2019 00:29:30 +0000 (UTC) From: John Baldwin <jhb@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: r351523 - in stable: 11/sys/netinet 12/sys/netinet Message-ID: <201908270029.x7R0TURs068038@repo.freebsd.org>
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Author: jhb Date: Tue Aug 27 00:29:30 2019 New Revision: 351523 URL: https://svnweb.freebsd.org/changeset/base/351523 Log: MFC 349474: Reject attempts to register a TCP stack being unloaded. Modified: stable/11/sys/netinet/tcp_subr.c Directory Properties: stable/11/ (props changed) Changes in other areas also in this revision: Modified: stable/12/sys/netinet/tcp_subr.c Directory Properties: stable/12/ (props changed) Modified: stable/11/sys/netinet/tcp_subr.c ============================================================================== --- stable/11/sys/netinet/tcp_subr.c Tue Aug 27 00:01:56 2019 (r351522) +++ stable/11/sys/netinet/tcp_subr.c Tue Aug 27 00:29:30 2019 (r351523) @@ -530,6 +530,9 @@ register_tcp_functions(struct tcp_function_block *blk, return (EINVAL); } } + if (blk->tfb_flags & TCP_FUNC_BEING_REMOVED) { + return (EINVAL); + } n = malloc(sizeof(struct tcp_function), M_TCPFUNCTIONS, wait); if (n == NULL) { return (ENOMEM); @@ -545,7 +548,6 @@ register_tcp_functions(struct tcp_function_block *blk, return (EALREADY); } refcount_init(&blk->tfb_refcnt, 0); - blk->tfb_flags = 0; TAILQ_INSERT_TAIL(&t_functions, n, tf_next); rw_wunlock(&tcp_function_lock); return(0);
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