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Message-Id: <20240126193143.245122-1-kovalev@altlinux.org>
Date: Fri, 26 Jan 2024 22:31:41 +0300
From: kovalev@...linux.org
To: stable@...r.kernel.org,
linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org,
linux-cifs@...r.kernel.org,
samba-technical@...ts.samba.org
Cc: keescook@...omium.org,
sfrench@...ba.org,
corbet@....net,
natechancellor@...il.com,
ndesaulniers@...gle.com,
kovalev@...linux.org
Subject: [PATCH 0/2] smb: client: fix "df: Resource temporarily unavailable" on 5.10 stable kernel
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
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