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3993382bb3
Qian Cai reports that the WARNING in tree_insert() can be triggered by a
fuzzer with the following call chain:
invalidate_inode_pages2_range()
fuse_launder_page()
fuse_writepage_locked()
tree_insert()
The reason is that another write for the same page is already queued.
The simplest fix is to wait until the pending write is completed and only
after that queue the new write.
Since this case is very rare, the additional wait should not be a problem.
Reported-by: Qian Cai <cai@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
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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.