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Fix bug #55537: Crash in SYN_SENT state when TCP_INPUT_DEBUG logs are ON

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This commit is contained in:
Dirk Ziegelmeier 2019-01-28 14:21:34 +01:00
parent 941300c21c
commit 4c19a909c2
1 changed files with 1 additions and 1 deletions
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2
src/core/tcp_in.c
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@ -856,7 +856,7 @@ tcp_process(struct tcp_pcb *pcb)
switch (pcb->state) { switch (pcb->state) {
case SYN_SENT: case SYN_SENT:
LWIP_DEBUGF(TCP_INPUT_DEBUG, ("SYN-SENT: ackno %"U32_F" pcb->snd_nxt %"U32_F" unacked %"U32_F"\n", ackno, LWIP_DEBUGF(TCP_INPUT_DEBUG, ("SYN-SENT: ackno %"U32_F" pcb->snd_nxt %"U32_F" unacked %"U32_F"\n", ackno,
pcb->snd_nxt, lwip_ntohl(pcb->unacked->tcphdr->seqno))); pcb->snd_nxt, (pcb->unacked != NULL)? lwip_ntohl(pcb->unacked->tcphdr->seqno) : 0));
/* received SYN ACK with expected sequence number? */ /* received SYN ACK with expected sequence number? */
if ((flags & TCP_ACK) && (flags & TCP_SYN) if ((flags & TCP_ACK) && (flags & TCP_SYN)
&& (ackno == pcb->lastack + 1)) { && (ackno == pcb->lastack + 1)) {