D57813.id180521.diff
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D57813.id180521.diff
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	diff --git a/sys/netinet/tcp_stacks/sack_filter.c b/sys/netinet/tcp_stacks/sack_filter.c
	--- a/sys/netinet/tcp_stacks/sack_filter.c
	+++ b/sys/netinet/tcp_stacks/sack_filter.c
	@@ -598,6 +598,11 @@
	*/
	continue;
	}
	+ if (at != i)
	+ memcpy(&in[at], &in[i], sizeof(struct sackblk));
	+ at++;
	+ if (sack_blk_used(sf, sf->sf_cur) == 0)
	+ sf->sf_used++;
	memcpy(&sf->sf_blks[sf->sf_cur], &in[i], sizeof(struct sackblk));
	sf->sf_bits = sack_blk_set(sf, sf->sf_cur);
	sf->sf_cur++;
	@@ -609,8 +614,9 @@
	highest_used = sf->sf_used;
	#endif
	}
	- if (sf->sf_cur)
	- sf->sf_cur--;
	+ if (cnt_added)
	+ sf->sf_cur = (sf->sf_cur + SACK_FILTER_BLOCKS - 1)
	+ % SACK_FILTER_BLOCKS;

	return (cnt_added);
	}