linux-kernel - [PATCH net] net: bpfilter: Fix type cast and pointer warnings

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Date:   Fri, 5 Oct 2018 20:57:48 +0530
From:   Shanthosh RK <shanthosh.rk@...il.com>
To:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     davem@...emloft.net
Subject: [PATCH net] net: bpfilter: Fix type cast and pointer warnings

Fixes the following Sparse warnings:

net/bpfilter/bpfilter_kern.c:62:21: warning: cast removes address space
of expression
net/bpfilter/bpfilter_kern.c:101:49: warning: Using plain integer as
NULL pointer

Signed-off-by: Shanthosh RK <shanthosh.rk@...il.com>
---
 net/bpfilter/bpfilter_kern.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/bpfilter/bpfilter_kern.c b/net/bpfilter/bpfilter_kern.c
index f0fc182d3db7..b64e1649993b 100644
--- a/net/bpfilter/bpfilter_kern.c
+++ b/net/bpfilter/bpfilter_kern.c
@@ -59,7 +59,7 @@ static int __bpfilter_process_sockopt(struct sock *sk, int optname,
 	req.is_set = is_set;
 	req.pid = current->pid;
 	req.cmd = optname;
-	req.addr = (long)optval;
+	req.addr = (long __force __user)optval;
 	req.len = optlen;
 	mutex_lock(&bpfilter_lock);
 	if (!info.pid)
@@ -98,7 +98,7 @@ static int __init load_umh(void)
 	pr_info("Loaded bpfilter_umh pid %d\n", info.pid);
 
 	/* health check that usermode process started correctly */
-	if (__bpfilter_process_sockopt(NULL, 0, 0, 0, 0) != 0) {
+	if (__bpfilter_process_sockopt(NULL, 0, NULL, 0, 0) != 0) {
 		stop_umh();
 		return -EFAULT;
 	}
-- 
2.11.0