From: Sasha Levin <sashal@kernel.org>
To: Johan Hovold <johan@kernel.org>
Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-usb@vger.kernel.org
Subject: Re: [PATCH AUTOSEL 4.19 592/671] USB: usb-skeleton: fix use-after-free after driver unbind
Date: Thu, 23 Jan 2020 09:22:52 -0500 [thread overview]
Message-ID: <20200123142252.GE1706@sasha-vm> (raw)
In-Reply-To: <20200117102116.GS2301@localhost>
On Fri, Jan 17, 2020 at 11:21:16AM +0100, Johan Hovold wrote:
>On Thu, Jan 16, 2020 at 12:03:50PM -0500, Sasha Levin wrote:
>> From: Johan Hovold <johan@kernel.org>
>>
>> [ Upstream commit 6353001852776e7eeaab4da78922d4c6f2b076af ]
>>
>> The driver failed to stop its read URB on disconnect, something which
>> could lead to a use-after-free in the completion handler after driver
>> unbind in case the character device has been closed.
>>
>> Fixes: e7389cc9a7ff ("USB: skel_read really sucks royally")
>> Signed-off-by: Johan Hovold <johan@kernel.org>
>> Link: https://lore.kernel.org/r/20191009170944.30057-3-johan@kernel.org
>> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>> Signed-off-by: Sasha Levin <sashal@kernel.org>
>
>This one isn't needed in any stable tree. As we discussed before, the
>skeleton driver is only there for documentation purposes.
I'll drop this, but I'm curious: doesn't this mean that users will build
on buggy example code?
--
Thanks,
Sasha
next prev parent reply other threads:[~2020-01-23 14:22 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200116170509.12787-1-sashal@kernel.org>
2020-01-16 16:58 ` [PATCH AUTOSEL 4.19 301/671] usb: typec: tcpm: Notify the tcpc to start connection-detection for SRPs Sasha Levin
2020-01-16 16:59 ` [PATCH AUTOSEL 4.19 325/671] usb: gadget: fsl: fix link error against usb-gadget module Sasha Levin
2020-01-16 16:59 ` [PATCH AUTOSEL 4.19 326/671] dwc2: gadget: Fix completed transfer size calculation in DDMA Sasha Levin
2020-01-16 17:01 ` [PATCH AUTOSEL 4.19 470/671] usb: host: xhci-hub: fix extra endianness conversion Sasha Levin
2020-01-16 17:02 ` [PATCH AUTOSEL 4.19 521/671] usb: typec: tps6598x: Fix build error without CONFIG_REGMAP_I2C Sasha Levin
2020-01-16 17:03 ` [PATCH AUTOSEL 4.19 592/671] USB: usb-skeleton: fix use-after-free after driver unbind Sasha Levin
2020-01-17 10:21 ` Johan Hovold
2020-01-23 14:22 ` Sasha Levin [this message]
2020-01-23 14:26 ` Greg Kroah-Hartman
2020-01-16 17:05 ` [PATCH AUTOSEL 4.19 668/671] usb: dwc3: Allow building USB_DWC3_QCOM without EXTCON Sasha Levin
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