netdev - Re: [PATCH net] ipv6: Fix crash when IPv6 is administratively disabled

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Date:   Sun, 18 Sep 2022 09:31:19 -0600
From:   David Ahern <dsahern@...nel.org>
To:     Ido Schimmel <idosch@...dia.com>, netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        edumazet@...gle.com, yoshfuji@...ux-ipv6.org, rroberto2r@...il.com,
        mlxsw@...dia.com
Subject: Re: [PATCH net] ipv6: Fix crash when IPv6 is administratively
 disabled

On 9/16/22 2:48 AM, Ido Schimmel wrote:
> The global 'raw_v6_hashinfo' variable can be accessed even when IPv6 is
> administratively disabled via the 'ipv6.disable=1' kernel command line
> option, leading to a crash [1].
> 
> Fix by restoring the original behavior and always initializing the
> variable, regardless of IPv6 support being administratively disabled or
> not.
> 

...

> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> Fixes: 0daf07e52709 ("raw: convert raw sockets to RCU")
> Reported-by: Roberto Ricci <rroberto2r@...il.com>
> Tested-by: Roberto Ricci <rroberto2r@...il.com>
> Signed-off-by: Ido Schimmel <idosch@...dia.com>
> ---
>  net/ipv6/af_inet6.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 


Reviewed-by: David Ahern <dsahern@...nel.org>