linux-kernel - Re: [PATCH v14 01/53] xhci: fix possible null pointer dereference at secondary interrupter removal

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Message-ID: <2024020931-unelected-scribble-50f4@gregkh>
Date: Fri, 9 Feb 2024 10:22:45 +0000
From: Greg KH <gregkh@...uxfoundation.org>
To: Wesley Cheng <quic_wcheng@...cinc.com>
Cc: srinivas.kandagatla@...aro.org, mathias.nyman@...el.com, perex@...ex.cz,
	conor+dt@...nel.org, corbet@....net, lgirdwood@...il.com,
	andersson@...nel.org, krzysztof.kozlowski+dt@...aro.org,
	Thinh.Nguyen@...opsys.com, broonie@...nel.org, bgoswami@...cinc.com,
	tiwai@...e.com, robh+dt@...nel.org, konrad.dybcio@...aro.org,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	linux-sound@...r.kernel.org, linux-usb@...r.kernel.org,
	linux-arm-msm@...r.kernel.org, linux-doc@...r.kernel.org,
	alsa-devel@...a-project.org,
	Mathias Nyman <mathias.nyman@...ux.intel.com>
Subject: Re: [PATCH v14 01/53] xhci: fix possible null pointer dereference at
 secondary interrupter removal

On Thu, Feb 08, 2024 at 03:13:14PM -0800, Wesley Cheng wrote:
> From: Mathias Nyman <mathias.nyman@...ux.intel.com>
> 
> Don't try to remove a secondary interrupter that is known to be invalid.
> Also check if the interrupter is valid inside the spinlock that protects
> the array of interrupters.
> 
> Found by smatch static checker
> 
> Reported-by: Dan Carpenter <dan.carpenter@...aro.org>
> Closes: https://lore.kernel.org/linux-usb/ffaa0a1b-5984-4a1f-bfd3-9184630a97b9@moroto.mountain/
> Fixes: c99b38c41234 ("xhci: add support to allocate several interrupters")
> Signed-off-by: Mathias Nyman <mathias.nyman@...ux.intel.com>
> Link: https://lore.kernel.org/r/20240125152737.2983959-2-mathias.nyman@linux.intel.com
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Signed-off-by: Wesley Cheng <quic_wcheng@...cinc.com>

Wait, this is already in my tree, right?  Why keep sending it?

confused,

greg k-h