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 CBFE647D46A; Thu, 20 Aug 2026 16:40:34 +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=1787244035; cv=none; b=beo4jfu9rf/AHi0x1DPrbkL/tzdkrmG46EDa82dh/A4oG1TLetYgqV2TnaAdLa73sTsit5doOWTvLvsDnC5S9gNiMgAVRnjHm7JpBcA2dxGFIPRu7SyP8kqUOyArpbgSjNuozOYSjoUmk/GNyPBaJhxTSc5b3lCq7m56zUR9fNw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787244035; c=relaxed/simple; bh=qt56gLkyugtDjiCh77I0db14nAutSvob/NKmxqzM2NU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oJPSj3z34a3bX3PxdfdjnTCnOj55nLQ2fYbiWUNwXL+bmUU2NYcdTnsBGARPlLs+EwXJlambHLwY0NQiLwv3I1WkC9sJLJpsjNkl7/wXdxoi1ixjER84F24MXdjKKUra45HZVTAO+ZOOmaHb2Hz/9usHJDvMxHljSNJ8I7z8/n0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=EF0E7jWX; 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="EF0E7jWX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 338811F000E9; Thu, 20 Aug 2026 16:40:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1787244034; bh=JTqFuhyhm9cBvLTas4ASUiWmCjROlP9/nvfXlXIiekg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=EF0E7jWXog9hBOywGi/TE16NHwoeQwbsOd1lPsn6qKMuPjD/j9gYQV5g5jUeV5pb5 NlKaZ0smULDT+T9rnqJzHY5uuXWl9JWELzqnzwbUxTBpwLlV/rTlT1GhPhyujb/ltR 3L8gs2FMbFRbugotVLSjOk2UoNB0blF3MQXVjFpA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Richard Davies , Dmitry Torokhov Subject: [PATCH 5.10 012/235] Input: focaltech - fix array out-of-bounds in focaltech_process_rel_packet Date: Thu, 20 Aug 2026 16:54:08 +0200 Message-ID: <20260820145216.813207505@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260820145216.426568665@linuxfoundation.org> References: <20260820145216.426568665@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 5.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Richard Davies commit 296736076b3fd078742651c719555a488624023a upstream. Make finger2 (and also finger1) unsigned, so that if the finger index in the packet is 0 then subtracting 1 creates an array index which overflows above the existing check for FOC_MAX_FINGERS, as the existing comment says it should, instead of writing to state->fingers[-1]. Fixes: 05be1d079ec0 ("Input: psmouse - support for the FocalTech PS/2 protocol extensions") Signed-off-by: Richard Davies Link: https://patch.msgid.link/20260701190932.14960-1-richard@arachsys.com Cc: stable@vger.kernel.org Signed-off-by: Dmitry Torokhov Signed-off-by: Greg Kroah-Hartman --- drivers/input/mouse/focaltech.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/input/mouse/focaltech.c +++ b/drivers/input/mouse/focaltech.c @@ -197,7 +197,7 @@ static void focaltech_process_rel_packet { struct focaltech_data *priv = psmouse->private; struct focaltech_hw_state *state = &priv->state; - int finger1, finger2; + unsigned int finger1, finger2; state->pressed = packet[0] >> 7; finger1 = ((packet[0] >> 4) & 0x7) - 1;