netdev - [PATCH net-next] net: filter: remove unused variable and fix warning

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 30 Oct 2017 13:46:47 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     netdev@...r.kernel.org
Cc:     oss-drivers@...ronome.com, alexei.starovoitov@...il.com,
        daniel@...earbox.net, Lawrence Brakmo <brakmo@...com>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: [PATCH net-next] net: filter: remove unused variable and fix warning

bpf_getsockopt bpf call sets the ret variable to zero and
never changes it.  What's worse in case CONFIG_INET is
not selected the variable is completely unused generating
a warning.

Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@...ronome.com>
---
 net/core/filter.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/core/filter.c b/net/core/filter.c
index 721c30889033..a0112168d6f9 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -3288,7 +3288,6 @@ BPF_CALL_5(bpf_getsockopt, struct bpf_sock_ops_kern *, bpf_sock,
 	   int, level, int, optname, char *, optval, int, optlen)
 {
 	struct sock *sk = bpf_sock->sk;
-	int ret = 0;
 
 	if (!sk_fullsock(sk))
 		goto err_clear;
@@ -3308,7 +3307,7 @@ BPF_CALL_5(bpf_getsockopt, struct bpf_sock_ops_kern *, bpf_sock,
 	} else {
 		goto err_clear;
 	}
-	return ret;
+	return 0;
 #endif
 err_clear:
 	memset(optval, 0, optlen);
-- 
2.14.1