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...
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