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Date:   Tue, 13 Mar 2018 23:01:05 +0100
From:   Salvatore Mesoraca <>
To:     Vivien Didelot <>
        Kernel Hardening <>,, "David S. Miller" <>,
        Andrew Lunn <>,
        Florian Fainelli <>,
        Kees Cook <>
Subject: Re: [PATCH] net: dsa: drop some VLAs in switch.c

2018-03-13 20:58 GMT+01:00 Vivien Didelot <>:
> Hi Salvatore,

Hi Vivien,

> Salvatore Mesoraca <> writes:
>> dsa_switch's num_ports is currently fixed to DSA_MAX_PORTS. So we avoid
>> 2 VLAs[1] by using DSA_MAX_PORTS instead of ds->num_ports.
>> [1]
>> Signed-off-by: Salvatore Mesoraca <>
> NAK.
> We are in the process to remove hardcoded limits such as DSA_MAX_PORTS
> and DSA_MAX_SWITCHES, so we have to stick with ds->num_ports.

I can rewrite the patch using kmalloc.
Although, if ds->num_ports will always be less than or equal to 12, it
should be better to
just use DSA_MAX_PORTS.

Thank you,


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