bpf, offload: Unlock on error in bpf_offload_dev_create()

[ Upstream commit d0fbb51dfaa612f960519b798387be436e8f83c5 ]

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@oracle.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Link: https://lore.kernel.org/bpf/20191104091536.GB31509@mwanda
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/kernel/bpf/offload.c b/kernel/bpf/offload.c
index 177a524..86477f3 100644 (file)
--- a/kernel/bpf/offload.c
+++ b/kernel/bpf/offload.c
@@ -645,8 +645,10 @@ struct bpf_offload_dev *bpf_offload_dev_create(void)
        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);