[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <472d92aa-1b49-43c9-a91f-80dfc8f25ad3@oracle.com>
Date: Sat, 27 Jan 2024 12:12:20 +0530
From: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
To: kovalev@...linux.org, Greg KH <greg@...ah.com>
Cc: stable@...r.kernel.org, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-cifs@...r.kernel.org,
samba-technical@...ts.samba.org, keescook@...omium.org,
sfrench@...ba.org, corbet@....net, natechancellor@...il.com,
ndesaulniers@...gle.com, "pc@...guebit.com" <pc@...guebit.com>,
"Mohamed Abuelfotoh, Hazem" <abuehaze@...zon.com>,
Shyam Prasad N <nspmangalore@...il.com>,
Vegard Nossum <vegard.nossum@...cle.com>,
Darren Kenny <darren.kenny@...cle.com>
Subject: Re: [PATCH 0/2] smb: client: fix "df: Resource temporarily
unavailable" on 5.10 stable kernel
Hi,
Adding more people to CC.(who have looked at this issue)
On 27/01/24 6:19 am, Greg KH wrote:
> On Fri, Jan 26, 2024 at 10:31:41PM +0300, kovalev@...linux.org wrote:
>> After mounting a remote cifs resource, it becomes unavailable:
>> df: /mnt/sambashare: Resource temporarily unavailable
>>
>> It was tested on the following Linux kernels:
>> Linux altlinux 5.10.208-std-def-alt1
>> Linux fedora 5.10.208-200.el8.x86_64
>>
>> The error appeared starting from kernel 5.10.206 after adding
>> the commit [1] "smb: client: fix OOB in SMB2_query_info_init()",
>> in which the buffer length increases by 1 as a result of changes:
>> ...
>> - iov[0].iov_len = total_len - 1 + input_len;
>> + iov[0].iov_len = len;
>> ...
>>
We can reproduce this on 5.15.148(latest 5.15.y) and Mohamed reported
this on 6.1.y, so we need backports there as well.
https://lore.kernel.org/all/09738f0f-53a2-43f1-a09d-a2bef48e1344@oracle.com/
[root@vm1 xfstests-dev]# ./check -g quick -s smb3
TEST_DEV=//<SERVER_IP>/TEST is mounted but not a type cifs filesystem
[root@vm1 xfstests-dev]# df
df: /mnt/test: Resource temporarily unavailable
This two patch series doesn't cleanly apply to 5.15.y.
Also I am unsure, which is the better approach to go with
Approach 1 - suggested by Paulo:
https://lore.kernel.org/all/446860c571d0699ed664175262a9e84b@manguebit.com/
Approach 2 - this series
Pulling in [PATCH 2/2] smb3: Replace smb2pdu 1-element arrays with
flex-arrays like this series did.
I think approach 1 is better as the changes are minimal, but please
correct me if that seems wrong.
Thanks,
Harshit
>> [1] https://patchwork.kernel.org/project/cifs-client/patch/20231213152557.6634-2-pc@manguebit.com/
>>
>> Error fixed by backported commits in next two patches adapted for the 5.10 kernel:
>>
>> [PATCH 1/2] stddef: Introduce DECLARE_FLEX_ARRAY() helper
>> [PATCH 2/2] smb3: Replace smb2pdu 1-element arrays with flex-arrays
>>
>>
>
> Now queued up, thanks.
>
> greg k-h
>
Powered by blists - more mailing lists