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 4D49C44E042; Tue, 16 Jun 2026 18:09:27 +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=1781633368; cv=none; b=c/D0tkXKJZy/oubz+ajjzEy3mZSS9P1KP/eVwnbt4+6W3gsTxjLg8GkqPeTOKjM5SYpSOgP2pTDZ+V1ImzWQoeVZWXPMVs4ce3FO5erHXy1/vW85oL0elirY5mlOFGgBAAN4H/lna+xtXa1IVQuaWbcYqoAPc8kGgEIa+1/cIaY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781633368; c=relaxed/simple; bh=KCnO1bgY1ce1mcN/t+OHqxIvkuGazBYdNrS6Xs+q9eU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qhi1dNPSwxhX3p46FpAdw2olzsYy7UF2aSYA1EmsBXK49l0hU9ZugmKCsk/3yChQAYKdB6nzbmQdV3Tf0cEOpPjWiahuFhG3LB3c2vFeLsxZd561RvBLYIJMqins9jIOT4yjOqg5grTnPl4MRyFmxVxJDs5OrxsVJhQBYHkisBY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=HCcWLdvm; 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="HCcWLdvm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4B24B1F000E9; Tue, 16 Jun 2026 18:09:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1781633367; bh=nScfTDXQiFoUdvUhgVXLQjIHUWukNUwzVNW+bSobHHM=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=HCcWLdvmB3aox7k8i+XXVx+go1DzvUwd3kjdMqsdPObqMCGOdyeypheoDqfEurHtF CwTi54HbCo3nZ6PLXimDFzkb1qPAxO6y9q2o2iYNcdE3AdXjOyQRpToKhDywM6EkBG +BRlhNCRZU/eMPlJMPRuzUNbAjjeVpqMYui0V9SE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Muhammad Bilal , Luiz Augusto von Dentz Subject: [PATCH 5.15 066/411] Bluetooth: HIDP: fix missing length checks in hidp_input_report() Date: Tue, 16 Jun 2026 20:25:04 +0530 Message-ID: <20260616145103.792200462@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260616145100.376842714@linuxfoundation.org> References: <20260616145100.376842714@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Muhammad Bilal commit 2a3ac9ee11dbb9845f3947cef4a79dba658cf6f6 upstream. hidp_input_report() reads keyboard and mouse payload data from an skb without first verifying that skb->len contains enough data. hidp_recv_intr_frame() pulls the 1-byte HIDP header before dispatching to hidp_input_report(). If a paired device sends a truncated packet, the handler reads beyond the valid skb data, resulting in an out-of-bounds read of skb data. The OOB bytes may be interpreted as phantom key presses or spurious mouse movement. Replace the open-coded length tracking and pointer arithmetic with skb_pull_data() calls. skb_pull_data() returns NULL if the requested bytes are not present, eliminating the need for a manual size variable and the separate skb->len guard. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable@vger.kernel.org Signed-off-by: Muhammad Bilal Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Greg Kroah-Hartman --- net/bluetooth/hidp/core.c | 23 ++++++++++++++++++----- 1 file changed, 18 insertions(+), 5 deletions(-) --- a/net/bluetooth/hidp/core.c +++ b/net/bluetooth/hidp/core.c @@ -179,12 +179,21 @@ static void hidp_input_report(struct hid { struct input_dev *dev = session->input; unsigned char *keys = session->keys; - unsigned char *udata = skb->data + 1; - signed char *sdata = skb->data + 1; - int i, size = skb->len - 1; + unsigned char *udata; + signed char *sdata; + u8 *hdr; + int i; + + hdr = skb_pull_data(skb, 1); + if (!hdr) + return; - switch (skb->data[0]) { + switch (*hdr) { case 0x01: /* Keyboard report */ + udata = skb_pull_data(skb, 8); + if (!udata) + break; + for (i = 0; i < 8; i++) input_report_key(dev, hidp_keycode[i + 224], (udata[0] >> i) & 1); @@ -213,6 +222,10 @@ static void hidp_input_report(struct hid break; case 0x02: /* Mouse report */ + sdata = skb_pull_data(skb, 3); + if (!sdata) + break; + input_report_key(dev, BTN_LEFT, sdata[0] & 0x01); input_report_key(dev, BTN_RIGHT, sdata[0] & 0x02); input_report_key(dev, BTN_MIDDLE, sdata[0] & 0x04); @@ -222,7 +235,7 @@ static void hidp_input_report(struct hid input_report_rel(dev, REL_X, sdata[1]); input_report_rel(dev, REL_Y, sdata[2]); - if (size > 3) + if (skb->len > 0) input_report_rel(dev, REL_WHEEL, sdata[3]); break; }