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/12/sys/netinet/tcp_subr.c
Directory Properties:
stable/12/ (props changed)
Changes in other areas also in this revision:
Modified:
stable/11/sys/netinet/tcp_subr.c
Directory Properties:
stable/11/ (props changed)
Modified: stable/12/sys/netinet/tcp_subr.c
==============================================================================
--- stable/12/sys/netinet/tcp_subr.c Tue Aug 27 00:01:56 2019
(r351522)
+++ stable/12/sys/netinet/tcp_subr.c Tue Aug 27 00:29:30 2019
(r351523)
@@ -813,8 +813,12 @@ register_tcp_functions_as_names(struct tcp_function_bl
}
}
+ if (blk->tfb_flags & TCP_FUNC_BEING_REMOVED) {
+ *num_names = 0;
+ return (EINVAL);
+ }
+
refcount_init(&blk->tfb_refcnt, 0);
- blk->tfb_flags = 0;
blk->tfb_id = atomic_fetchadd_int(&next_tcp_stack_id, 1);
for (i = 0; i < *num_names; i++) {
n = malloc(sizeof(struct tcp_function), M_TCPFUNCTIONS, wait);
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