Re: [Linux-kernel-mentees] [PATCH net v2] xdp: Prevent kernel-infoleak in xsk_getsockopt()

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Subject: Re: [Linux-kernel-mentees] [PATCH net v2] xdp: Prevent kernel-infoleak in xsk_getsockopt()
From: Arnd Bergmann <arnd@xxxxxxxx>
Date: Tue, 28 Jul 2020 09:34:54 +0200
Cc: Song Liu <songliubraving@xxxxxx>, Björn Töpel <bjorn.topel@xxxxxxxxx>, Magnus Karlsson <magnus.karlsson@xxxxxxxxx>, Jonathan Lemon <jonathan.lemon@xxxxxxxxx>, Dan Carpenter <dan.carpenter@xxxxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>, Jakub Kicinski <kuba@xxxxxxxxxx>, Alexei Starovoitov <ast@xxxxxxxxxx>, Daniel Borkmann <daniel@xxxxxxxxxxxxx>, Jesper Dangaard Brouer <hawk@xxxxxxxxxx>, John Fastabend <john.fastabend@xxxxxxxxx>, Martin KaFai Lau <kafai@xxxxxx>, Yonghong Song <yhs@xxxxxx>, Andrii Nakryiko <andriin@xxxxxx>, KP Singh <kpsingh@xxxxxxxxxxxx>, linux-kernel-mentees@xxxxxxxxxxxxxxxxxxxxxxxxx, Networking <netdev@xxxxxxxxxxxxxxx>, bpf <bpf@xxxxxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>
In-reply-to: <20200728053604.404631-1-yepeilin.cs@gmail.com>

On Tue, Jul 28, 2020 at 7:37 AM Peilin Ye <yepeilin.cs@xxxxxxxxx> wrote:
>
> xsk_getsockopt() is copying uninitialized stack memory to userspace when
> `extra_stats` is `false`. Fix it.
>
> Fixes: 8aa5a33578e9 ("xsk: Add new statistics")
> Suggested-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> Signed-off-by: Peilin Ye <yepeilin.cs@xxxxxxxxx>

Acked-by: Arnd Bergmann <arnd@xxxxxxxx>

References:
- [Linux-kernel-mentees] [PATCH net] xdp: Prevent kernel-infoleak in xsk_getsockopt()
  - From: Peilin Ye
- [Linux-kernel-mentees] [PATCH net v2] xdp: Prevent kernel-infoleak in xsk_getsockopt()
  - From: Peilin Ye

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