linux-hardening - Re: [PATCH][next] net: dev: Convert sa_data to flexible array in struct sockaddr

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Message-Id: <166673341646.9987.5803101009027995896.git-patchwork-notify@kernel.org>
Date:   Tue, 25 Oct 2022 21:30:16 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Kees Cook <keescook@...omium.org>
Cc:     kuba@...nel.org, davem@...emloft.net, edumazet@...gle.com,
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Subject: Re: [PATCH][next] net: dev: Convert sa_data to flexible array in struct
 sockaddr

Hello:

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

On Tue, 18 Oct 2022 02:56:03 -0700 you wrote:
> One of the worst offenders of "fake flexible arrays" is struct sockaddr,
> as it is the classic example of why GCC and Clang have been traditionally
> forced to treat all trailing arrays as fake flexible arrays: in the
> distant misty past, sa_data became too small, and code started just
> treating it as a flexible array, even though it was fixed-size. The
> special case by the compiler is specifically that sizeof(sa->sa_data)
> and FORTIFY_SOURCE (which uses __builtin_object_size(sa->sa_data, 1))
> do not agree (14 and -1 respectively), which makes FORTIFY_SOURCE treat
> it as a flexible array.
> 
> [...]

Here is the summary with links:
  - [next] net: dev: Convert sa_data to flexible array in struct sockaddr
    https://git.kernel.org/netdev/net-next/c/b5f0de6df6dc

You are awesome, thank you!
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