linux-kernel - Re: [PATCH] of: overlay: add_changeset

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Date:   Tue, 26 Nov 2019 12:23:54 -0700
From:   Rob Herring <robh@...nel.org>
To:     frowand.list@...il.com
Cc:     Vincent Whitchurch <vincent.whitchurch@...s.com>,
        pantelis.antoniou@...sulko.com,
        Pantelis Antoniou <panto@...oniou-consulting.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Vincent Whitchurch <rabinv@...s.com>, geert@...ux-m68k.org,
        Alan Tull <atull@...nel.org>
Subject: Re: [PATCH] of: overlay: add_changeset_property() memory leak

On Thu, 21 Nov 2019 13:16:56 -0600, frowand.list@...il.com wrote:
> From: Frank Rowand <frank.rowand@...y.com>
> 
> No changeset entries are created for #address-cells and #size-cells
> properties, but the duplicated properties are never freed.  This
> results in a memory leak which is detected by kmemleak:
> 
>  unreferenced object 0x85887180 (size 64):
>    backtrace:
>      kmem_cache_alloc_trace+0x1fb/0x1fc
>      __of_prop_dup+0x25/0x7c
>      add_changeset_property+0x17f/0x370
>      build_changeset_next_level+0x29/0x20c
>      of_overlay_fdt_apply+0x32b/0x6b4
>      ...
> 
> Fixes: 6f75118800acf77f8 ("of: overlay: validate overlay properties #address-cells and #size-cells")
> Reported-by: Vincent Whitchurch <vincent.whitchurch@...s.com>
> Signed-off-by: Frank Rowand <frank.rowand@...y.com>
> ---
>  drivers/of/overlay.c | 37 ++++++++++++++++++++-----------------
>  1 file changed, 20 insertions(+), 17 deletions(-)
> 

Applied, thanks.

Rob