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Subject[PATCH 1/1] Bluetooth: btrtl: check for NULL in btrtl_set_quirks()
Date
From: Max Chou <max.chou@realtek.com>

The btrtl_set_quirks() has accessed btrtl_dev->ic_info->lmp_subver since
b8e482d02513. However, if installing a Realtek Bluetooth controller
without the driver supported, it will hit the NULL point accessed.

Add a check for NULL to avoid the Kernel Oops.

Signed-off-by: Max Chou <max.chou@realtek.com>
---
drivers/bluetooth/btrtl.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/bluetooth/btrtl.c b/drivers/bluetooth/btrtl.c
index 8fa7733812ad..0f256a8abef4 100644
--- a/drivers/bluetooth/btrtl.c
+++ b/drivers/bluetooth/btrtl.c
@@ -905,6 +905,9 @@ void btrtl_set_quirks(struct hci_dev *hdev, struct btrtl_device_info *btrtl_dev)
break;
}

+ if (!btrtl_dev->ic_info)
+ return;
+
switch (btrtl_dev->ic_info->lmp_subver) {
case RTL_ROM_LMP_8703B:
/* 8723CS reports two pages for local ext features,
--
2.34.1
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