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[ Upstream commit 68ca1b49e430f6534d0774a94147a823e3b8b26e ] The root inode has a fixed nodeid and generation (1, 0). Prior to the commit15db16837a("fuse: fix illegal access to inode with reused nodeid") generation number on lookup was ignored. After this commit lookup with the wrong generation number resulted in the inode being unhashed. This is correct for non-root inodes, but replacing the root inode is wrong and results in weird behavior. Fix by reverting to the old behavior if ignoring the generation for the root inode, but issuing a warning in dmesg. Reported-by: Antonio SJ Musumeci <trapexit@spawn.link> Closes: https://lore.kernel.org/all/CAOQ4uxhek5ytdN8Yz2tNEOg5ea4NkBb4nk0FGPjPk_9nz-VG3g@mail.gmail.com/ Fixes:15db16837a("fuse: fix illegal access to inode with reused nodeid") Cc: <stable@vger.kernel.org> # v5.14 Signed-off-by: Miklos Szeredi <mszeredi@redhat.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.