linux-kernel - Re: [RESEND PATCH] ext4: Annotate struct fname with __counted

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Message-ID: <2024110530-ashen-deforest-9f71@gregkh>
Date: Tue, 5 Nov 2024 10:52:50 +0100
From: Greg KH <gregkh@...uxfoundation.org>
To: Thorsten Blum <thorsten.blum@...ux.dev>
Cc: Theodore Ts'o <tytso@....edu>,
	Andreas Dilger <adilger.kernel@...ger.ca>,
	Kees Cook <kees@...nel.org>,
	"Gustavo A. R. Silva" <gustavoars@...nel.org>,
	Jan Kara <jack@...e.cz>, linux-ext4@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [RESEND PATCH] ext4: Annotate struct fname with __counted_by()

On Tue, Nov 05, 2024 at 12:42:14AM +0100, Thorsten Blum wrote:
> Add the __counted_by compiler attribute to the flexible array member
> name to improve access bounds-checking via CONFIG_UBSAN_BOUNDS and
> CONFIG_FORTIFY_SOURCE.
> 
> Inline and use struct_size() to calculate the number of bytes to
> allocate for new_fn and remove the local variable len.

This is two different things, why not do this in two different patches?

thanks,

greg k-h