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Chris Wilson authored
Matthew pointed out that we could face a double failure with concurrent
allocations/frees, and so the assumption that the local var alloc was
NULL was fraught with danger. Rather than complicate the error paths too
much to add a second local for a second free, just do the second free
earlier on the unwind path.

Reported-by: default avatarMatthew Auld <matthew.william.auld@gmail.com>
Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.william.auld@gmail.com>
Reviewed-by: default avatarMatthew Auld <matthew.william.auld@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190704104345.6603-1-chris@chris-wilson.co.uk
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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.