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 6730F2EBB8D; Tue, 21 Jul 2026 20:34:50 +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=1784666091; cv=none; b=oLq6GfM+8rsr1cY2+BXwyscLnPLPelcHXGoKjXmDIfnCjN5JA8C/B2MavROAXDMiMxhwl77nayK5qMeMYWMv2YTPldcSyJnWPxLjv8W6eAs93tgty7gC1HY4E70U5H82wCf6fGyk6/TLCUucLPWQzVAeEFszveI5b1VVET/+EII= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784666091; c=relaxed/simple; bh=NasBng3aWBUNnCz28MjcGOIiI4R9RSda6DEr9ZGj3pg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eywyGM0rZGViJertwTLwVapprv1k5upImTD10OaIbQ9PHwGG5b4RxPCsvaq2QYp0UgUlHS8113MSPs/6XOBgl4eCVRVSbXtK6Bv/2wU/VEqNpqZra1SPLGJluuPdQIN4Qb9V3U0tznAwy0NnzY8GK1xKpLJP8y+nDdDfq0wdvdU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=M5mEgJRG; 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="M5mEgJRG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CCB101F000E9; Tue, 21 Jul 2026 20:34:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784666090; bh=7Yb6IuW45SYQJuwKKCeO9K+XuHgSiFr0sGWWvD+KD9c=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=M5mEgJRGmUMcd2J6JvYFP3CtRT7/qLYW26dUNnbSVsOCfs3JIS3QFfuA2J+AlEnj9 kwTGPaBK3sMHP/hJ8vPY+y6YcJvmvDsF5hN98LeG+FvWg1x2Chb4wNZMOOZOwARH9t BGGbL04lOHe7aDOcTLL3+MtDx5anhs2qjYoMJr40= 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 6.6 0549/1266] Bluetooth: hci_qca: fix NULL pointer dereference in qca_dmp_hdr() for non-serdev device Date: Tue, 21 Jul 2026 17:16:26 +0200 Message-ID: <20260721152454.152620459@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152441.786066624@linuxfoundation.org> References: <20260721152441.786066624@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 6.6-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 ac737ee143614c..2986b18655a150 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)); } -- 2.53.0