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[ Upstream commitc907e72f58] When the client received NFS4ERR_BADSESSION, it schedules recovery and start the state manager thread which in turn freezes the session table and does not allow for any new requests to use the no-longer valid session. However, it is possible that before the state manager thread runs, a new operation would use the released slot that received BADSESSION and was therefore not updated its sequence number. Such re-use of the slot can lead the application errors. Fixes:5c441544f0("NFSv4.x: Handle bad/dead sessions correctly in nfs41_sequence_process()") Signed-off-by: Olga Kornievskaia <kolga@netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.