25 lines
1019 B
Diff
25 lines
1019 B
Diff
From e80d4ff2cc5f8f864e9e996c72b47ebefd2a5175 Mon Sep 17 00:00:00 2001
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From: Erik Ekman <erik@kryo.se>
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Date: Fri, 19 Jun 2020 15:00:25 +0200
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Subject: [PATCH] tcp: Fix double free in tcp_split_unsent_seg()
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Fixes bug #57377 (found by Hiromasa Ito).
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Conflict: NA
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Reference: https://git.savannah.gnu.org/cgit/lwip.git/commit/?id=e80d4ff2cc5f8f864e9e996c72b47ebefd2a5175
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---
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src/core/tcp_out.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/src/core/tcp_out.c b/src/core/tcp_out.c
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index bfb033b1..d9d1b57b 100644
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--- a/src/core/tcp_out.c
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+++ b/src/core/tcp_out.c
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@@ -913,6 +913,7 @@ tcp_split_unsent_seg(struct tcp_pcb *pcb, u16_t split)
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seg = tcp_create_segment(pcb, p, remainder_flags, lwip_ntohl(useg->tcphdr->seqno) + split, optflags);
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if (seg == NULL) {
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+ p = NULL; /* Freed by tcp_create_segment */
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LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_LEVEL_SERIOUS,
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("tcp_split_unsent_seg: could not create new TCP segment\n"));
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goto memerr;
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--
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2.28.0.windows.1
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