linux-kernel - Re: [PATCH v2] lib/iov_iter: fix to increase non slab folio refcount

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]

Message-ID: <15dfe0c4-c1cb-4146-ab06-cd36b7412b2e@gmail.com>
Date: Wed, 2 Apr 2025 21:36:49 +0800
From: Sheng Yong <shengyong2021@...il.com>
To: Vlastimil Babka <vbabka@...e.cz>, akpm@...ux-foundation.org,
 willy@...radead.org
Cc: linux-kernel@...r.kernel.org, linux-mm@...hiver.kernel.org,
 Sheng Yong <shengyong1@...omi.com>
Subject: Re: [PATCH v2] lib/iov_iter: fix to increase non slab folio refcount

On 4/1/25 23:22, Vlastimil Babka wrote:
> On 4/1/25 16:47, Sheng Yong wrote:
>> From: Sheng Yong <shengyong1@...omi.com>
[...]
>>
>> Fixes: b9c0e49abfca ("mm: decline to manipulate the refcount on a slab page")
> 
> Sigh. That went to v6.14
> 
> mm-hotfixes and Cc: stable then?

Hi, Vlastimil,

Shall I resend this patch with Cc: tag to the stable list?

thanks,
sheng

> 
>> Signed-off-by: Sheng Yong <shengyong1@...omi.com>
> 
> Acked-by: Vlastimil Babka <vbabka@...e.cz>
> 
> Thanks.
> 
>> ---
>>   lib/iov_iter.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>> ---
>> v2:
>>    * update commit message
>>    * update coding style
>>
>> diff --git a/lib/iov_iter.c b/lib/iov_iter.c
>> index 8c7fdb7d8c8f..bc9391e55d57 100644
>> --- a/lib/iov_iter.c
>> +++ b/lib/iov_iter.c
>> @@ -1191,7 +1191,7 @@ static ssize_t __iov_iter_get_pages_alloc(struct iov_iter *i,
>>   			return -ENOMEM;
>>   		p = *pages;
>>   		for (int k = 0; k < n; k++) {
>> -			struct folio *folio = page_folio(page);
>> +			struct folio *folio = page_folio(page + k);
>>   			p[k] = page + k;
>>   			if (!folio_test_slab(folio))
>>   				folio_get(folio);
>