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Date:   Fri, 30 Sep 2022 02:21:08 +0000
To:     Kees Cook <>
Subject: Re: [PATCH] net: sched: cls_u32: Avoid memcpy() false-positive warning


This patch was applied to netdev/net-next.git (master)
by Jakub Kicinski <>:

On Tue, 27 Sep 2022 08:37:01 -0700 you wrote:
> To work around a misbehavior of the compiler's ability to see into
> composite flexible array structs (as detailed in the coming memcpy()
> hardening series[1]), use unsafe_memcpy(), as the sizing,
> bounds-checking, and allocation are all very tightly coupled here.
> This silences the false-positive reported by syzbot:
>   memcpy: detected field-spanning write (size 80) of single field "&n->sel" at net/sched/cls_u32.c:1043 (size 16)
> [...]

Here is the summary with links:
  - net: sched: cls_u32: Avoid memcpy() false-positive warning

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