linux-kernel - Re: [PATCH v1] misc: fastrpc: Reset metadata buffer to avoid incorrect free

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Message-ID: <2023092840-balmy-proved-e337@gregkh>
Date:   Thu, 28 Sep 2023 15:08:12 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Ekansh Gupta <quic_ekangupt@...cinc.com>
Cc:     srinivas.kandagatla@...aro.org, linux-arm-msm@...r.kernel.org,
        ekangupt@....qualcomm.com, linux-kernel@...r.kernel.org,
        fastrpc.upstream@....qualcomm.com
Subject: Re: [PATCH v1] misc: fastrpc: Reset metadata buffer to avoid
 incorrect free

On Thu, Aug 31, 2023 at 12:05:23PM +0530, Ekansh Gupta wrote:
> Metadata buffer is allocated during get_args for any remote call.
> This buffer carries buffers, fdlists and other payload information
> for the call. If the buffer is not reset, put_args might find some
> garbage FDs in the fdlist which might have an existing mapping in
> the list. This could result in improper freeing of FD map when DSP
> might still be using the buffer. Added change to reset the metadata
> buffer after allocation.
> 
> Signed-off-by: Ekansh Gupta <quic_ekangupt@...cinc.com>

What commit id does this fix?

And you sent 3 patches, but not in a list, what order are they to be
applied in?

thanks,

greg k-h