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tcp: Fix double free in tcp_split_unsent_seg()

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Fixes bug #57377 (found by Hiromasa Ito).
This commit is contained in:
Erik Ekman 2020-06-19 15:00:25 +02:00
parent ea111c511e
commit e80d4ff2cc
1 changed files with 1 additions and 0 deletions
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src/core/tcp_out.c
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@ -913,6 +913,7 @@ tcp_split_unsent_seg(struct tcp_pcb *pcb, u16_t split)
seg = tcp_create_segment(pcb, p, remainder_flags, lwip_ntohl(useg->tcphdr->seqno) + split, optflags);
if (seg == NULL) {
p = NULL; /* Freed by tcp_create_segment */
LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_LEVEL_SERIOUS,
("tcp_split_unsent_seg: could not create new TCP segment\n"));
goto memerr;