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Bluetooth: qca: fix NULL-deref on non-serdev setup 

commit 7ddb9de6af upstream.

Qualcomm ROME controllers can be registered from the Bluetooth line
discipline and in this case the HCI UART serdev pointer is NULL.

Add the missing sanity check to prevent a NULL-pointer dereference when
setup() is called for a non-serdev controller.

Fixes: e9b3e5b8c6 ("Bluetooth: hci_qca: only assign wakeup with serial port support")
Cc: stable@vger.kernel.org      # 6.2
Cc: Zhengping Jiang <jiangzp@google.com>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2024-04-22 15:57:48 +02:00 committed by Greg Kroah-Hartman
parent b64092d2f1
commit bec4d4c6fa
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/bluetooth/hci_qca.c
View File

@ -1960,8 +1960,10 @@ retry:
qca_debugfs_init(hdev);
hu->hdev->hw_error = qca_hw_error;
hu->hdev->cmd_timeout = qca_cmd_timeout;
if (device_can_wakeup(hu->serdev->ctrl->dev.parent))
hu->hdev->wakeup = qca_wakeup;
if (hu->serdev) {
if (device_can_wakeup(hu->serdev->ctrl->dev.parent))
hu->hdev->wakeup = qca_wakeup;
}
} else if (ret == -ENOENT) {
/* No patch/nvm-config found, run with original fw/config */
set_bit(QCA_ROM_FW, &qca->flags);