6de3014d4b
No upstream commit exists for this patch. If we drop the lock right after adding it to the timeout list, then someone attempting to kill timeouts will find it in an indeterminate state. That means that cancelation could attempt to cancel and remove a timeout, and then io_timeout() proceeds to init and add the timer afterwards. Ensure the timeout request is fully setup before we drop the completion lock, which guards cancelation as well. Reported-and-tested-by: Lee Jones <lee@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.