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fixed the crash issue when len is minus caused by invalid data.

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This commit is contained in:
tanjunliang 2018-11-01 10:26:54 +08:00
parent b8100f9de9
commit 3580539e0f
1 changed files with 1 additions and 1 deletions
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ikcp.c
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@ -772,7 +772,7 @@ int ikcp_input(ikcpcb *kcp, const char *data, long size)
size -= IKCP_OVERHEAD;
if ((long)size < (long)len) return -2;
if ((long)size < (long)len || (int)len < 0) return -2;
if (cmd != IKCP_CMD_PUSH && cmd != IKCP_CMD_ACK &&
cmd != IKCP_CMD_WASK && cmd != IKCP_CMD_WINS)