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From: Daniel Wagner <dwagner@suse.de>
To: linux-nvme@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, Jens Axboe <axboe@fb.com>,
	Christoph Hellwig <hch@lst.de>, Keith Busch <kbusch@kernel.org>,
	Daniel Wagner <dwagner@suse.de>, Hannes Reinecke <hare@suse.de>
Subject: [PATCH] nvme/hwmon: Return error code when registration fails
Date: Fri, 12 Feb 2021 10:30:15 +0100	[thread overview]
Message-ID: <20210212093015.2846-1-dwagner@suse.de> (raw)

The hwmon pointer wont be NULL if the registration fails. Though the
exit code path will assign it to ctrl->hwmon_device. Later
nvme_hwmon_exit() will try to free the invalid pointer. Avoid this by
returning the error code from hwmon_device_register_with_info().

Fixes: ec420cdcfab4 ("nvme/hwmon: rework to avoid devm allocation")
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
---

This patch is against linux-block/for-next.

 drivers/nvme/host/hwmon.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvme/host/hwmon.c b/drivers/nvme/host/hwmon.c
index 8f9e96986780..0a586d712920 100644
--- a/drivers/nvme/host/hwmon.c
+++ b/drivers/nvme/host/hwmon.c
@@ -248,6 +248,7 @@ int nvme_hwmon_init(struct nvme_ctrl *ctrl)
 	if (IS_ERR(hwmon)) {
 		dev_warn(dev, "Failed to instantiate hwmon device\n");
 		kfree(data);
+		return PTR_ERR(hwmon);
 	}
 	ctrl->hwmon_device = hwmon;
 	return 0;
-- 
2.29.2


WARNING: multiple messages have this Message-ID (diff)
From: Daniel Wagner <dwagner@suse.de>
To: linux-nvme@lists.infradead.org
Cc: Daniel Wagner <dwagner@suse.de>,
	linux-kernel@vger.kernel.org, Jens Axboe <axboe@fb.com>,
	Hannes Reinecke <hare@suse.de>, Keith Busch <kbusch@kernel.org>,
	Christoph Hellwig <hch@lst.de>
Subject: [PATCH] nvme/hwmon: Return error code when registration fails
Date: Fri, 12 Feb 2021 10:30:15 +0100	[thread overview]
Message-ID: <20210212093015.2846-1-dwagner@suse.de> (raw)

The hwmon pointer wont be NULL if the registration fails. Though the
exit code path will assign it to ctrl->hwmon_device. Later
nvme_hwmon_exit() will try to free the invalid pointer. Avoid this by
returning the error code from hwmon_device_register_with_info().

Fixes: ec420cdcfab4 ("nvme/hwmon: rework to avoid devm allocation")
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
---

This patch is against linux-block/for-next.

 drivers/nvme/host/hwmon.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvme/host/hwmon.c b/drivers/nvme/host/hwmon.c
index 8f9e96986780..0a586d712920 100644
--- a/drivers/nvme/host/hwmon.c
+++ b/drivers/nvme/host/hwmon.c
@@ -248,6 +248,7 @@ int nvme_hwmon_init(struct nvme_ctrl *ctrl)
 	if (IS_ERR(hwmon)) {
 		dev_warn(dev, "Failed to instantiate hwmon device\n");
 		kfree(data);
+		return PTR_ERR(hwmon);
 	}
 	ctrl->hwmon_device = hwmon;
 	return 0;
-- 
2.29.2


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             reply	other threads:[~2021-02-12  9:31 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-12  9:30 Daniel Wagner [this message]
2021-02-12  9:30 ` [PATCH] nvme/hwmon: Return error code when registration fails Daniel Wagner
2021-02-12 12:46 ` Hannes Reinecke
2021-02-12 12:46   ` Hannes Reinecke
2021-02-24  9:14 ` Christoph Hellwig
2021-02-24  9:14   ` Christoph Hellwig

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