netdev - [PATCH bpf] bpf: offload: unlock on error in bpf_offload_dev

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Message-ID: <20191104091536.GB31509@mwanda>
Date:   Mon, 4 Nov 2019 12:15:36 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Alexei Starovoitov <ast@...nel.org>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>
Cc:     Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>, netdev@...r.kernel.org,
        bpf@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH bpf] bpf: offload: unlock on error in bpf_offload_dev_create()

We need to drop the bpf_devs_lock on error before returning.

Fixes: 9fd7c5559165 ("bpf: offload: aggregate offloads per-device")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
Static analysis.  Not tested.

 kernel/bpf/offload.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/bpf/offload.c b/kernel/bpf/offload.c
index ba635209ae9a..5b9da0954a27 100644
--- a/kernel/bpf/offload.c
+++ b/kernel/bpf/offload.c
@@ -678,8 +678,10 @@ bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv)
 	down_write(&bpf_devs_lock);
 	if (!offdevs_inited) {
 		err = rhashtable_init(&offdevs, &offdevs_params);
-		if (err)
+		if (err) {
+			up_write(&bpf_devs_lock);
 			return ERR_PTR(err);
+		}
 		offdevs_inited = true;
 	}
 	up_write(&bpf_devs_lock);
-- 
2.20.1