From: John Wood <john.wood@gmx.com>
To: Marcel Holtmann <marcel@holtmann.org>,
Johan Hedberg <johan.hedberg@gmail.com>,
Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Cc: John Wood <john.wood@gmx.com>,
stable@vger.kernel.org, linux-bluetooth@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] bluetooth/virtio_bt: Fix dereference null return value
Date: Sun, 4 Jul 2021 16:55:04 +0200 [thread overview]
Message-ID: <20210704145504.24756-1-john.wood@gmx.com> (raw)
The alloc_skb function returns NULL on error. So, test this case and
avoid a NULL dereference (skb->data).
Addresses-Coverity-ID: 1484718 ("Dereference null return value")
Fixes: afd2daa26c7ab ("Bluetooth: Add support for virtio transport driver")
Signed-off-by: John Wood <john.wood@gmx.com>
---
drivers/bluetooth/virtio_bt.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/bluetooth/virtio_bt.c b/drivers/bluetooth/virtio_bt.c
index c804db7e90f8..5f82574236c0 100644
--- a/drivers/bluetooth/virtio_bt.c
+++ b/drivers/bluetooth/virtio_bt.c
@@ -34,6 +34,8 @@ static int virtbt_add_inbuf(struct virtio_bluetooth *vbt)
int err;
skb = alloc_skb(1000, GFP_KERNEL);
+ if (!skb)
+ return -ENOMEM;
sg_init_one(sg, skb->data, 1000);
err = virtqueue_add_inbuf(vq, sg, 1, skb, GFP_KERNEL);
--
2.25.1
next reply other threads:[~2021-07-04 14:55 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-04 14:55 John Wood [this message]
2021-07-04 17:33 ` Marcel Holtmann
2021-07-04 19:02 ` Greg KH
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