From 1e907a32b77e5d418538453df5945242e43224fa Mon Sep 17 00:00:00 2001 From: Fan Yang Date: Tue, 24 Sep 2019 22:08:29 +0800 Subject: [PATCH] COLO-compare: Fix incorrect `if` logic MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 'colo_mark_tcp_pkt' should return 'true' when packets are the same, and 'false' otherwise. However, it returns 'true' when 'colo_compare_packet_payload' returns non-zero while 'colo_compare_packet_payload' is just a 'memcmp'. The result is that COLO-compare reports inconsistent TCP packets when they are actually the same. Fixes: f449c9e549c ("colo: compare the packet based on the tcp sequence number") Cc: qemu-stable@nongnu.org Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Fan Yang Signed-off-by: Jason Wang --- net/colo-compare.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/net/colo-compare.c b/net/colo-compare.c index 7489840bde..7ee17f2cf8 100644 --- a/net/colo-compare.c +++ b/net/colo-compare.c @@ -319,7 +319,7 @@ static bool colo_mark_tcp_pkt(Packet *ppkt, Packet *spkt, *mark = 0; if (ppkt->tcp_seq == spkt->tcp_seq && ppkt->seq_end == spkt->seq_end) { - if (colo_compare_packet_payload(ppkt, spkt, + if (!colo_compare_packet_payload(ppkt, spkt, ppkt->header_size, spkt->header_size, ppkt->payload_size)) { *mark = COLO_COMPARE_FREE_SECONDARY | COLO_COMPARE_FREE_PRIMARY; @@ -329,7 +329,7 @@ static bool colo_mark_tcp_pkt(Packet *ppkt, Packet *spkt, /* one part of secondary packet payload still need to be compared */ if (!after(ppkt->seq_end, spkt->seq_end)) { - if (colo_compare_packet_payload(ppkt, spkt, + if (!colo_compare_packet_payload(ppkt, spkt, ppkt->header_size + ppkt->offset, spkt->header_size + spkt->offset, ppkt->payload_size - ppkt->offset)) { @@ -348,7 +348,7 @@ static bool colo_mark_tcp_pkt(Packet *ppkt, Packet *spkt, /* primary packet is longer than secondary packet, compare * the same part and mark the primary packet offset */ - if (colo_compare_packet_payload(ppkt, spkt, + if (!colo_compare_packet_payload(ppkt, spkt, ppkt->header_size + ppkt->offset, spkt->header_size + spkt->offset, spkt->payload_size - spkt->offset)) {