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Date: Fri, 26 Jan 2024 16:49:18 -0800
From: Greg KH <greg@kroah.com>
To: kovalev@altlinux.org
Cc: stable@vger.kernel.org, linux-doc@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-cifs@vger.kernel.org,
	samba-technical@lists.samba.org, keescook@chromium.org,
	sfrench@samba.org, corbet@lwn.net, natechancellor@gmail.com,
	ndesaulniers@google.com
Subject: Re: [PATCH 0/2] smb: client: fix "df: Resource temporarily
 unavailable" on 5.10 stable kernel
Message-ID: <2024012613-woozy-exhume-7b9d@gregkh>
References: <20240126193143.245122-1-kovalev@altlinux.org>
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In-Reply-To: <20240126193143.245122-1-kovalev@altlinux.org>

On Fri, Jan 26, 2024 at 10:31:41PM +0300, kovalev@altlinux.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;
> ...
> 
> [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