From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A878F47255C; Tue, 21 Jul 2026 17:57:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784656665; cv=none; b=ev7ZqlMSdK7WjaHo3jnJqphf+opgUWAZFw+0zzQCYfd9/p8jkDydRukArd5nW8Qy//zeA8it26k9Y8BJTKMGa5oAX7fFQvV0RtqhdxcJAVWVY27sQM6O392pLFhA9302UA800LfTk8MDKTnkYQi3XakeazzHm6frmhDzxleotLc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784656665; c=relaxed/simple; bh=EK9RDYRcAvvt1ow7C7cYAt5aYUPKib+RJKSRGHH9fDc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=EYratzRVE6I7DHEAwF2di6ceMykwAKaJTBv+ArmeWilDBRdpr0g6qaR8s//Y2HSj+tfe2+8BJaUAQ66SLywaZV/TDyk9J82mJYpIw53Im/AiAuDMkbW9oxuTUIBytgEghzEaHtQLajoZjTcSBEIKqn7iVTFAXXvaXFRRcx77JKU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=08BFAEf1; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="08BFAEf1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C691B1F000E9; Tue, 21 Jul 2026 17:57:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784656663; bh=NfPt3pnn2//QBg+FgkEntxq+geB1bMlQM2JumdCXnZ4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=08BFAEf1bRgHwOvSqLEOLQ8y86/JtlWSfKobPAt4BwJPtrIRcU1a4N3619SqouGwR g45GBiekFEGS0zsW62+PZnjS+7jXn4qQqTNmWRyJV1aYfEY3bZjd3m/zOdTHTqLRl9 Oe5lz1orbWh9owWirOaJ6ZnED42D4yWNvV622c+Q= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Zijun Hu , Luiz Augusto von Dentz , Sasha Levin Subject: [PATCH 6.18 0465/1611] Bluetooth: hci_qca: fix NULL pointer dereference in qca_dmp_hdr() for non-serdev device Date: Tue, 21 Jul 2026 17:09:41 +0200 Message-ID: <20260721152525.774477278@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152514.750365251@linuxfoundation.org> References: <20260721152514.750365251@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Zijun Hu [ 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 d37a51101ca760..c649a3f702c042 100644 --- a/drivers/bluetooth/hci_qca.c +++ b/drivers/bluetooth/hci_qca.c @@ -1023,7 +1023,7 @@ 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)); } -- 2.53.0