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net: fix divide by zero in tcp algorithm illinois
[pandora-kernel.git]
/
net
/
ipv4
/
tcp_illinois.c
diff --git
a/net/ipv4/tcp_illinois.c
b/net/ipv4/tcp_illinois.c
index
813b43a
..
834857f
100644
(file)
--- a/
net/ipv4/tcp_illinois.c
+++ b/
net/ipv4/tcp_illinois.c
@@
-313,11
+313,13
@@
static void tcp_illinois_info(struct sock *sk, u32 ext,
.tcpv_rttcnt = ca->cnt_rtt,
.tcpv_minrtt = ca->base_rtt,
};
.tcpv_rttcnt = ca->cnt_rtt,
.tcpv_minrtt = ca->base_rtt,
};
- u64 t = ca->sum_rtt;
- do_div(t, ca->cnt_rtt);
-
info.tcpv_rtt =
t;
+ if (info.tcpv_rttcnt > 0) {
+
u64 t = ca->sum_rt
t;
+ do_div(t, info.tcpv_rttcnt);
+ info.tcpv_rtt = t;
+ }
nla_put(skb, INET_DIAG_VEGASINFO, sizeof(info), &info);
}
}
nla_put(skb, INET_DIAG_VEGASINFO, sizeof(info), &info);
}
}