From 809230cc25dde1d6bb00de2a1eeb5f3199402fbe Mon Sep 17 00:00:00 2001 From: Zijun Hu Date: Mon, 1 Jun 2026 04:30:56 -0700 Subject: [PATCH] Bluetooth: hci_qca: fix NULL pointer dereference in qca_dmp_hdr() for non-serdev device [ Upstream commit 6b8cbcf08de0db62254d1981f83db0f94681ccd9 ] hu->serdev is NULL for hci_uart attached via non-serdev paths, but qca_dmp_hdr() unconditionally dereferences hu->serdev->dev.driver->name, causing a NULL pointer dereference. Fix by guarding the dereference with a NULL check and falling back to "hci_ldisc_qca" for the non-serdev case. Fixes: 06d3fdfcdf5c ("Bluetooth: hci_qca: Add qcom devcoredump support") Signed-off-by: Zijun Hu Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Sasha Levin --- drivers/bluetooth/hci_qca.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c index ac737ee14361..2986b18655a1 100644 --- a/drivers/bluetooth/hci_qca.c +++ b/drivers/bluetooth/hci_qca.c @@ -1008,7 +1008,7 @@ static void qca_dmp_hdr(struct hci_dev *hdev, struct sk_buff *skb) skb_put_data(skb, buf, strlen(buf)); snprintf(buf, sizeof(buf), "Driver: %s\n", - hu->serdev->dev.driver->name); + hu->serdev ? hu->serdev->dev.driver->name : "hci_ldisc_qca"); skb_put_data(skb, buf, strlen(buf)); }