lkml.org 
[lkml]   [2021]   [Jul]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] bluetooth/virtio_bt: Fix dereference null return value
Date
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
\
 
 \ /
  Last update: 2021-07-04 16:57    [W:0.058 / U:0.336 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site