toe: Read-lock the inp in toe_4tuple_check().
tcp_twcheck now expects a read lock on the inp for the SYN case
instead of a write lock.
Reviewed by: np
Fixes: 1db08fbe3f
tcp_input: always request read-locking of PCB for any pure SYN segment.
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D30782
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@ -390,19 +390,19 @@ toe_4tuple_check(struct in_conninfo *inc, struct tcphdr *th, struct ifnet *ifp)
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if (inc->inc_flags & INC_ISIPV6) {
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inp = in6_pcblookup(&V_tcbinfo, &inc->inc6_faddr,
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inc->inc_fport, &inc->inc6_laddr, inc->inc_lport,
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INPLOOKUP_WLOCKPCB, ifp);
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INPLOOKUP_RLOCKPCB, ifp);
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} else {
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inp = in_pcblookup(&V_tcbinfo, inc->inc_faddr, inc->inc_fport,
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inc->inc_laddr, inc->inc_lport, INPLOOKUP_WLOCKPCB, ifp);
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inc->inc_laddr, inc->inc_lport, INPLOOKUP_RLOCKPCB, ifp);
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}
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if (inp != NULL) {
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INP_WLOCK_ASSERT(inp);
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INP_RLOCK_ASSERT(inp);
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if ((inp->inp_flags & INP_TIMEWAIT) && th != NULL) {
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if (!tcp_twcheck(inp, NULL, th, NULL, 0))
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return (EADDRINUSE);
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} else {
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INP_WUNLOCK(inp);
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INP_RUNLOCK(inp);
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return (EADDRINUSE);
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}
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}
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