sunrpc: Fix reserved port range calculation
The range calculation for choosing the random reserved port will panic with divide-by-zero when min_resvport == max_resvport, a range of one port, not zero. Fix the reserved port range calculation by adding one to the difference. Signed-off-by: Frank Sorenson <sorenson@redhat.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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@ -1714,7 +1714,7 @@ static void xs_udp_timer(struct rpc_xprt *xprt, struct rpc_task *task)
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static unsigned short xs_get_random_port(void)
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{
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unsigned short range = xprt_max_resvport - xprt_min_resvport;
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unsigned short range = xprt_max_resvport - xprt_min_resvport + 1;
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unsigned short rand = (unsigned short) prandom_u32() % range;
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return rand + xprt_min_resvport;
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}
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