Fix for a bug in tcp_sack_option() causing crashes.
Submitted by: Noritoshi Demizu, Mohan Srinivasan. Approved by: re (scottl blanket SACK)
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=147535
@ -474,8 +474,7 @@ tcp_sack_option(struct tcpcb *tp, struct tcphdr *th, u_char *cp, int optlen)
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* Since the incoming sack blocks are sorted, we can process them
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* making one sweep of the scoreboard.
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*/
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while (sblkp - sack_blocks >= 0) {
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KASSERT(cur != NULL, ("cur != NULL"));
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while (sblkp - sack_blocks >= 0 && cur != NULL) {
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if (SEQ_GEQ(sblkp->start, cur->end)) {
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/*
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* SACKs data beyond the current hole.
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