linux-kernel - [PATCH 4.14 006/185] HID: sony: Fix memory corruption issue on cleanup.

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Message-Id: <20191003154438.695963429@linuxfoundation.org>
Date:   Thu,  3 Oct 2019 17:51:24 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Roderick Colenbrander <roderick.colenbrander@...y.com>,
        Jiri Kosina <jkosina@...e.cz>
Subject: [PATCH 4.14 006/185] HID: sony: Fix memory corruption issue on cleanup.

From: Roderick Colenbrander <roderick.colenbrander@...y.com>

commit 2bcdacb70327013ca2066bfcf2af1009eff01f1d upstream.

The sony driver is not properly cleaning up from potential failures in
sony_input_configured. Currently it calls hid_hw_stop, while hid_connect
is still running. This is not a good idea, instead hid_hw_stop should
be moved to sony_probe. Similar changes were recently made to Logitech
drivers, which were also doing improper cleanup.

Signed-off-by: Roderick Colenbrander <roderick.colenbrander@...y.com>
CC: stable@...r.kernel.org
Signed-off-by: Jiri Kosina <jkosina@...e.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/hid/hid-sony.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/hid/hid-sony.c
+++ b/drivers/hid/hid-sony.c
@@ -2710,7 +2710,6 @@ err_stop:
 	kfree(sc->output_report_dmabuf);
 	sony_remove_dev_list(sc);
 	sony_release_device_id(sc);
-	hid_hw_stop(hdev);
 	return ret;
 }
 
@@ -2772,6 +2771,7 @@ static int sony_probe(struct hid_device
 	 */
 	if (!(hdev->claimed & HID_CLAIMED_INPUT)) {
 		hid_err(hdev, "failed to claim input\n");
+		hid_hw_stop(hdev);
 		return -ENODEV;
 	}