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Commit 5d71899a authored by Frank Sorenson's avatar Frank Sorenson Committed by Trond Myklebust
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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: default avatarFrank Sorenson <sorenson@redhat.com>
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent 34ae685c

net/sunrpc/xprtsock.c

+1 −1
Original line number Diff line number Diff line
@@ -1714,7 +1714,7 @@ static void xs_udp_timer(struct rpc_xprt *xprt, struct rpc_task *task) 


static unsigned short xs_get_random_port(void)

{

	unsigned short range = xprt_max_resvport - xprt_min_resvport;

	unsigned short range = xprt_max_resvport - xprt_min_resvport + 1;

	unsigned short rand = (unsigned short) prandom_u32() % range;

	return rand + xprt_min_resvport;

}