linux-kernel - Re: [PATCH -next 0/2] Introduce memset

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Message-ID: <85904fc5-0c1b-7410-b818-7d0b959ce7af@huawei.com>
Date:   Wed, 8 Dec 2021 18:30:31 +0800
From:   xiujianfeng <xiujianfeng@...wei.com>
To:     Kees Cook <keescook@...omium.org>
CC:     <akpm@...ux-foundation.org>, <laniel_francis@...vacyrequired.com>,
        <andriy.shevchenko@...ux.intel.com>, <adobriyan@...il.com>,
        <linux@...ck-us.net>, <andreyknvl@...il.com>, <dja@...ens.net>,
        <ast@...nel.org>, <daniel@...earbox.net>, <andrii@...nel.org>,
        <kafai@...com>, <songliubraving@...com>, <yhs@...com>,
        <john.fastabend@...il.com>, <kpsingh@...nel.org>,
        <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        <bpf@...r.kernel.org>
Subject: Re: [PATCH -next 0/2] Introduce memset_range() helper for wiping
 members


在 2021/12/8 13:27, Kees Cook 写道:
> On Wed, Dec 08, 2021 at 11:04:49AM +0800, Xiu Jianfeng wrote:
>> Xiu Jianfeng (2):
>>    string.h: Introduce memset_range() for wiping members
> For doing a memset range, the preferred method is to use
> a struct_group in the structure itself. This makes the range
> self-documenting, and allows the compile to validate the exact size,
> makes it addressable, etc. The other memset helpers are for "everything
> to the end", which doesn't usually benefit from the struct_group style
> of range declaration.
Do you mean there is no need to introduce this helper,  but to use 
struct_group in the struct directly?
>
>>    bpf: use memset_range helper in __mark_reg_known
> I never saw this patch arrive on the list?
I have send this patch as well, can you please check again?
>