linux-hardening - Re: Crash in VirtualBox virtual machines running kernel 6.5

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 19 Jul 2023 08:34:37 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Larry Finger <Larry.Finger@...inger.net>
Cc:     Hans de Goede <hdegoede@...hat.com>,
        Azeem Shaikh <azeemshaikh38@...il.com>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-hardening@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>
Subject: Re: Crash in VirtualBox virtual machines running kernel 6.5

On Wed, Jul 19, 2023 at 08:31:08AM -0700, Kees Cook wrote:
> diff --git a/fs/vboxsf/shfl_hostintf.h b/fs/vboxsf/shfl_hostintf.h
> index aca829062c12..243d1b91bb45 100644
> --- a/fs/vboxsf/shfl_hostintf.h
> +++ b/fs/vboxsf/shfl_hostintf.h
> @@ -68,9 +68,8 @@ struct shfl_string {
>  
>  	/** UTF-8 or UTF-16 string. Nul terminated. */
>  	union {
> -		u8 utf8[2];
> -		u16 utf16[1];
> -		u16 ucs2[1]; /* misnomer, use utf16. */
> +		DECLARE_FLEX_ARRAY(u8, utf8);
> +		DECLARE_FLEX_ARRAY(u16, utf16);
>  	} string;
>  };
>  VMMDEV_ASSERT_SIZE(shfl_string, 6);

Oops, this doesn't even compile. Let me get that fixed...

-- 
Kees Cook