linux-kernel - hsi: suspected uaf issue in hsi

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Message-ID: <TYCP286MB1188FCF65D3EA7360DF3DC0A8A8E9@TYCP286MB1188.JPNP286.PROD.OUTLOOK.COM>
Date:   Fri, 5 Nov 2021 07:52:27 +0000
From:   YE Chengfeng <cyeaa@...nect.ust.hk>
To:     "sre@...nel.org" <sre@...nel.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: hsi: suspected uaf issue in hsi_core.c

Hi,

It seems that put_device will free cl, so we are returning a freed object. Should we add goto err; in this branch?
https://github.com/torvalds/linux/blob/master/drivers/hsi/hsi_core.c#L102

Best regards,
Chengfeng