From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 861C02D6612; Mon, 27 Oct 2025 18:45:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761590726; cv=none; b=WvSsAiwpx7xHVVBWSSGWUSf1h86T6If8yhHF7cHKy/k9O1yqgM4NFeXYRgZnDQXGG4jMj0ViSMLZh32qCdqUXcwGB14Qk8xPEy5FE3OQQptBeSrBXrt7zcRY4w9ricapLGAOHYhVNVTPMS1rJsJ3A4EEqANeoB9kyp9RN1SUHPw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761590726; c=relaxed/simple; bh=oggotWLO8yDqXE28MWuF4eXv6Rca7MK6f0yiC7ExPlM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YGy8ttma2th0WPfHE1aE4ly1RxYEKHnz/zELlxT1CUSMfOaQFvXhmekjEAX4yGe8nhqtG8IbucI5XZCENl6aBt5l/hM9hRuD3aR+0KrqRsdheU0FBe1aRCcQvaO0NF0UorglzfvXUdJUrM1ceQ32eVht/+WmBpskPsRrvaeied8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=1XJSe9Pq; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="1XJSe9Pq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1BAB0C4CEFD; Mon, 27 Oct 2025 18:45:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1761590726; bh=oggotWLO8yDqXE28MWuF4eXv6Rca7MK6f0yiC7ExPlM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1XJSe9PqmgZ4VKqjMMnTv4w/omV/I7unM0v9sLRDcX+rpNDpSLB1qvpk8Qj38jdcD S1g1aew+TNfKcTZkvCRcxWpfKw42rf0o3rSmdiBZUGqARBV+Se1d6IVwmUMb+U6od9 rk419HCL+NQgkgA4lO5FM+smweBZ4VOuQFdj6wMc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ma Ke , Sean Young , Hans Verkuil , Sasha Levin Subject: [PATCH 5.4 154/224] media: lirc: Fix error handling in lirc_register() Date: Mon, 27 Oct 2025 19:35:00 +0100 Message-ID: <20251027183513.074246328@linuxfoundation.org> X-Mailer: git-send-email 2.51.1 In-Reply-To: <20251027183508.963233542@linuxfoundation.org> References: <20251027183508.963233542@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 5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ma Ke [ Upstream commit 4f4098c57e139ad972154077fb45c3e3141555dd ] When cdev_device_add() failed, calling put_device() to explicitly release dev->lirc_dev. Otherwise, it could cause the fault of the reference count. Found by code review. Cc: stable@vger.kernel.org Fixes: a6ddd4fecbb0 ("media: lirc: remove last remnants of lirc kapi") Signed-off-by: Ma Ke Signed-off-by: Sean Young Signed-off-by: Hans Verkuil Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/media/rc/lirc_dev.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) --- a/drivers/media/rc/lirc_dev.c +++ b/drivers/media/rc/lirc_dev.c @@ -762,11 +762,11 @@ int ir_lirc_register(struct rc_dev *dev) cdev_init(&dev->lirc_cdev, &lirc_fops); + get_device(&dev->dev); + err = cdev_device_add(&dev->lirc_cdev, &dev->lirc_dev); if (err) - goto out_ida; - - get_device(&dev->dev); + goto out_put_device; switch (dev->driver_type) { case RC_DRIVER_SCANCODE: @@ -790,7 +790,8 @@ int ir_lirc_register(struct rc_dev *dev) return 0; -out_ida: +out_put_device: + put_device(&dev->lirc_dev); ida_free(&lirc_ida, minor); return err; }