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openvswitch: meter: Use 64-bit arithmetic instead of 32-bit 

Add suffix LL to constant 1000 in order to give the compiler
complete information about the proper arithmetic to use. Notice
that this constant is used in a context that expects an expression
of type long long int (64 bits, signed).

The expression (band->burst_size + band->rate) * 1000 is currently
being evaluated using 32-bit arithmetic.

Addresses-Coverity-ID: 1461563 ("Unintentional integer overflow")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gustavo A. R. Silva 2018-01-30 22:55:33 -06:00 committed by David S. Miller
parent e4823fbd22
commit 5b7789e8fa
1 changed files with 1 additions and 1 deletions
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net/openvswitch/meter.c
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@ -488,7 +488,7 @@ bool ovs_meter_execute(struct datapath *dp, struct sk_buff *skb,
long long int max_bucket_size;
band = &meter->bands[i];
max_bucket_size = (band->burst_size + band->rate) * 1000;
max_bucket_size = (band->burst_size + band->rate) * 1000LL;
band->bucket += delta_ms * band->rate;
if (band->bucket > max_bucket_size)