Re: [PATCH] sctp: use GFP_USER for user-controlled kmalloc

[David Miller]

From: Marcelo Ricardo Leitner <marcelo.leitner@xxxxxxxxx>
Date: Mon, 30 Nov 2015 14:32:54 -0200

> Dmitry Vyukov reported that the user could trigger a kernel warning by
> using a large len value for getsockopt SCTP_GET_LOCAL_ADDRS, as that
> value directly affects the value used as a kmalloc() parameter.
> 
> This patch thus switches the allocation flags from all user-controllable
> kmalloc size to GFP_USER to put some more restrictions on it and also
> disables the warn, as they are not necessary.
> 
> Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@xxxxxxxxx>
> Acked-by: Daniel Borkmann <daniel@xxxxxxxxxxxxx>

Applied.
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