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authorChristoph Paasch <cpaasch@apple.com>2019-07-06 16:13:07 -0700
committerDavid S. Miller <davem@davemloft.net>2019-07-08 19:29:19 -0700
commite858faf556d4e14c750ba1e8852783c6f9520a0e (patch)
treefd947f61dfb523a13ff1513676705215bb1289f3
parentselftests: txring_overwrite: fix incorrect test of mmap() return value (diff)
downloadlinux-dev-e858faf556d4e14c750ba1e8852783c6f9520a0e.tar.xz
linux-dev-e858faf556d4e14c750ba1e8852783c6f9520a0e.zip
tcp: Reset bytes_acked and bytes_received when disconnecting
If an app is playing tricks to reuse a socket via tcp_disconnect(), bytes_acked/received needs to be reset to 0. Otherwise tcp_info will report the sum of the current and the old connection.. Cc: Eric Dumazet <edumazet@google.com> Fixes: 0df48c26d841 ("tcp: add tcpi_bytes_acked to tcp_info") Fixes: bdd1f9edacb5 ("tcp: add tcpi_bytes_received to tcp_info") Signed-off-by: Christoph Paasch <cpaasch@apple.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv4/tcp.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 7dc9ab84bb69..2eebd092c3c1 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2614,6 +2614,8 @@ int tcp_disconnect(struct sock *sk, int flags)
tcp_saved_syn_free(tp);
tp->compressed_ack = 0;
tp->bytes_sent = 0;
+ tp->bytes_acked = 0;
+ tp->bytes_received = 0;
tp->bytes_retrans = 0;
tp->duplicate_sack[0].start_seq = 0;
tp->duplicate_sack[0].end_seq = 0;