netdev - Re: [RFC] [PATCH] net: socket: Fix the wrong returns for recvmsg and sendmsg

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Date:	Tue, 2 Jun 2015 15:05:57 +0800
From:	Junling Zheng <zhengjunling@...wei.com>
To:	Willy Tarreau <w@....eu>
CC:	Greg KH <gregkh@...uxfoundation.org>,
	David Miller <davem@...emloft.net>, <lizefan@...wei.com>,
	<viro@...iv.linux.org.uk>, <xuhanbing@...wei.com>,
	<stable@...r.kernel.org>, <netdev@...r.kernel.org>
Subject: Re: [RFC] [PATCH] net: socket: Fix the wrong returns for recvmsg
 and sendmsg

On 2015/6/2 14:52, Willy Tarreau wrote:
> On Tue, Jun 02, 2015 at 02:43:54PM +0800, Junling Zheng wrote:
>> On 2015/6/2 14:27, Greg KH wrote:
>>> On Mon, Jun 01, 2015 at 10:23:57PM -0700, David Miller wrote:
>>>> From: Junling Zheng <zhengjunling@...wei.com>
>>>> Date: Tue, 2 Jun 2015 12:05:32 +0800
>>>>
>>>>> So, the problem commit is 281c9c36 (net: compat: Update
>>>>> get_compat_msghdr() to match copy_msghdr_from_user() behaviour),
>>>>> which fixes db31c55a6fb2 and brings the get_compat_msghdr() in line
>>>>> with copy_msghdr_from_user().
>>>>
>>>> Upstream this got fixed by:
>>>>
>>>> 08adb7dabd4874cc5666b4490653b26534702ce0
>>>>
>>>> So the part that makes us not unconditionally return -EFAULT needs
>>>> to be backported, and that's probably equivalent to the patch
>>>> your proposed which therefore should be applied.
>>>
>>> Ok, thanks, now applied.
>>>
>>
>> Maybe other stable version also needs this fix:)
> 
> Yes, from what I'm seeing, at least 3.2 and 2.6.32 need it as well.
> 

Yeah, all other stable versions *except 3.19 and 4.0* may need this fix:)

> Thanks,
> Willy
> 
> 
> .
> 


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