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In orangefs_devreq_read, there is a loop which picks an op off the list of pending ops. If the loop fails to find an op, there is nothing to read, and it returns EAGAIN. If the op has been given up on, the loop is restarted via a goto. The bug is that the variable which the found op is written to is not reinitialized, so if there are no more eligible ops on the list, the code runs again on the already handled op. This is triggered by interrupting a process while the op is being copied to the client-core. It's a fairly small window, but it's there. Signed-off-by: Martin Brandenburg <martin@omnibond.com> Cc: stable@vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.