From: Alexei Starovoitov <ast@kernel.org>
Date: Tue, 14 Jul 2020 19:31:45 +0000 (-0700)
Subject: bpfilter: Initialize pos variable
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a4fa458950b40d3849946daa32466392811a3716;p=linux.git

bpfilter: Initialize pos variable

Make sure 'pos' is initialized to zero before calling kernel_write().

Fixes: d2ba09c17a06 ("net: add skeleton of bpfilter kernel module")
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
---

diff --git a/net/bpfilter/bpfilter_kern.c b/net/bpfilter/bpfilter_kern.c
index 54f82c341e20b..2c31e82cb953a 100644
--- a/net/bpfilter/bpfilter_kern.c
+++ b/net/bpfilter/bpfilter_kern.c
@@ -48,6 +48,7 @@ static int __bpfilter_process_sockopt(struct sock *sk, int optname,
 	req.len = optlen;
 	if (!bpfilter_ops.info.tgid)
 		goto out;
+	pos = 0;
 	n = kernel_write(bpfilter_ops.info.pipe_to_umh, &req, sizeof(req),
 			   &pos);
 	if (n != sizeof(req)) {