From ffb6ca33b04b965ac7dd10676537b93e2476dcec Mon Sep 17 00:00:00 2001
From: Frank Sorenson <sorenson@redhat.com>
Date: Fri, 8 Jul 2016 16:35:25 -0500
Subject: [PATCH] sunrpc: Prevent resvport min/max inversion via sysfs and
module parameter
The current min/max resvport settings are independently limited
by the entire range of allowed ports, so max_resvport can be
set to a port lower than min_resvport.
Prevent inversion of min/max values when set through sysfs and
module parameter by setting the limits dependent on each other.
Signed-off-by: Frank Sorenson <sorenson@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
net/sunrpc/xprtsock.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 2674309770f4..83e6f3316149 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -3153,8 +3153,12 @@ static int param_set_uint_minmax(const char *val,
static int param_set_portnr(const char *val, const struct kernel_param *kp)
{
- return param_set_uint_minmax(val, kp,
+ if (kp->arg == &xprt_min_resvport)
+ return param_set_uint_minmax(val, kp,
RPC_MIN_RESVPORT,
+ xprt_max_resvport);
+ return param_set_uint_minmax(val, kp,
+ xprt_min_resvport,
RPC_MAX_RESVPORT);
}