[PATCH] Bluetooth: btusb: Fix potential NULL dereference on kmalloc failure

[PATCH] Bluetooth: btusb: Fix potential NULL dereference on kmalloc failure

[Zhongqiu Han]

Avoid potential NULL pointer dereference by checking the return value of
kmalloc and handling allocation failure properly.

Fixes: 7d70989fcea7 ("Bluetooth: btusb: Add HCI Drv commands for configuring altsetting")
Signed-off-by: Zhongqiu Han <quic_zhonhan@quicinc.com>
---
 drivers/bluetooth/btusb.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index f8f256ff79a3..642b3238ea39 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -3799,6 +3799,8 @@ static int btusb_hci_drv_supported_altsettings(struct hci_dev *hdev, void *data,
 
 	/* There are at most 7 alt (0 - 6) */
 	rp = kmalloc(sizeof(*rp) + 7, GFP_KERNEL);
+	if (!rp)
+		return -ENOMEM;
 
 	rp->num = 0;
 	if (!drvdata->isoc)
-- 
2.43.0

Re: [PATCH] Bluetooth: btusb: Fix potential NULL dereference on kmalloc failure

[patchwork-bot+bluetooth]

Hello:

This patch was applied to bluetooth/bluetooth-next.git (master)
by Luiz Augusto von Dentz <luiz.von.dentz@intel.com>:

On Sat, 5 Jul 2025 18:52:46 +0800 you wrote:
> Avoid potential NULL pointer dereference by checking the return value of
> kmalloc and handling allocation failure properly.
> 
> Fixes: 7d70989fcea7 ("Bluetooth: btusb: Add HCI Drv commands for configuring altsetting")
> Signed-off-by: Zhongqiu Han <quic_zhonhan@quicinc.com>
> ---
>  drivers/bluetooth/btusb.c | 2 ++
>  1 file changed, 2 insertions(+)

Here is the summary with links:
  - Bluetooth: btusb: Fix potential NULL dereference on kmalloc failure
    https://git.kernel.org/bluetooth/bluetooth-next/c/982ac6d394db

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html