diff options
Diffstat (limited to 'freebsd/sys/netinet/tcp_timewait.c')
| -rw-r--r-- | freebsd/sys/netinet/tcp_timewait.c | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/freebsd/sys/netinet/tcp_timewait.c b/freebsd/sys/netinet/tcp_timewait.c index 13105339..61263dfe 100644 --- a/freebsd/sys/netinet/tcp_timewait.c +++ b/freebsd/sys/netinet/tcp_timewait.c @@ -1,6 +1,8 @@ #include <machine/rtems-bsd-kernel-space.h> /*- + * SPDX-License-Identifier: BSD-3-Clause + * * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995 * The Regents of the University of California. All rights reserved. * @@ -49,6 +51,9 @@ __FBSDID("$FreeBSD$"); #include <sys/proc.h> #include <sys/socket.h> #include <sys/socketvar.h> +#ifndef INVARIANTS +#include <sys/syslog.h> +#endif #include <sys/protosw.h> #include <sys/random.h> @@ -711,10 +716,29 @@ tcp_tw_2msl_scan(int reuse) INP_WLOCK(inp); tw = intotw(inp); if (in_pcbrele_wlocked(inp)) { - KASSERT(tw == NULL, ("%s: held last inp " - "reference but tw not NULL", __func__)); - INP_INFO_RUNLOCK(&V_tcbinfo); - continue; + if (__predict_true(tw == NULL)) { + INP_INFO_RUNLOCK(&V_tcbinfo); + continue; + } else { + /* This should not happen as in TIMEWAIT + * state the inp should not be destroyed + * before its tcptw. If INVARIANTS is + * defined panic. + */ +#ifdef INVARIANTS + panic("%s: Panic before an infinite " + "loop: INP_TIMEWAIT && (INP_FREED " + "|| inp last reference) && tw != " + "NULL", __func__); +#else + log(LOG_ERR, "%s: Avoid an infinite " + "loop: INP_TIMEWAIT && (INP_FREED " + "|| inp last reference) && tw != " + "NULL", __func__); +#endif + INP_INFO_RUNLOCK(&V_tcbinfo); + break; + } } if (tw == NULL) { |