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authorAlexey Kodanev <alexey.kodanev@oracle.com>2017-02-22 13:23:56 +0300
committerDavid S. Miller <davem@davemloft.net>2017-02-23 00:35:58 +0300
commiteee2faabc63d863a129000b698a2bca54dff643d (patch)
tree14f835fc3953a86d3bc533d8d918f3664f5365c7 /net
parent00355fa5bb89840c48eb11eb6d84c6c3b128a839 (diff)
downloadlinux-eee2faabc63d863a129000b698a2bca54dff643d.tar.xz
tcp: account for ts offset only if tsecr not zero
We can get SYN with zero tsecr, don't apply offset in this case. Fixes: ee684b6f2830 ("tcp: send packets with a socket timestamp") Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/tcp_minisocks.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c
index dff7d2aaf861..7e16243cdb58 100644
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c
@@ -101,7 +101,8 @@ tcp_timewait_state_process(struct inet_timewait_sock *tw, struct sk_buff *skb,
tcp_parse_options(skb, &tmp_opt, 0, NULL);
if (tmp_opt.saw_tstamp) {
- tmp_opt.rcv_tsecr -= tcptw->tw_ts_offset;
+ if (tmp_opt.rcv_tsecr)
+ tmp_opt.rcv_tsecr -= tcptw->tw_ts_offset;
tmp_opt.ts_recent = tcptw->tw_ts_recent;
tmp_opt.ts_recent_stamp = tcptw->tw_ts_recent_stamp;
paws_reject = tcp_paws_reject(&tmp_opt, th->rst);