Re: [PATCH][next] bnx2x: Replace one-element array with flexible-array member

[Jakub Kicinski]

On Fri, 4 Feb 2022 17:21:44 -0600 Gustavo A. R. Silva wrote:
> There is a regular need in the kernel to provide a way to declare having
> a dynamically sized set of trailing elements in a structure. Kernel code
> should always use “flexible array members”[1] for these cases. The older
> style of one-element or zero-length arrays should no longer be used[2].
> 
> This helps with the ongoing efforts to globally enable -Warray-bounds
> and get us closer to being able to tighten the FORTIFY_SOURCE routines
> on memcpy().
> 
> This issue was found with the help of Coccinelle and audited and fixed,
> manually.
> 
> [1] https://en.wikipedia.org/wiki/Flexible_array_member
> [2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays
> 
> Link: https://github.com/KSPP/linux/issues/79
> Signed-off-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx>

Would be useful to include the analysis confirming the change is safe
in this case, beyond the boiler plate commit message.

Reviewed-by: Jakub Kicinski <kuba@xxxxxxxxxx>