Re: [Qemu-block] [Qemu-devel] [PATCH 08/10] qemu-iotests: fix uninitialized variable

[Eric Blake]

On 09/12/2017 09:44 AM, Paolo Bonzini wrote:
> The variable is used in "common" but defined only after the file
> is sourced.
> 
> Signed-off-by: Paolo Bonzini <address@hidden>
> ---
>  tests/qemu-iotests/check  | 2 --
>  tests/qemu-iotests/common | 2 ++
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 

Reviewed-by: Eric Blake <address@hidden>

> +tmp="${TEST_DIR}"/$$

Pre-existing to your code motion, but would we be any safer if $tmp also
included a use of $RANDOM?  (The $$ already protects us from collisions
with a parallel run, but it is easy to guess, so if $tmp is used to
create any file that an attacker can access, running the testsuite may
expose a machine to a symlink or other attack - but we probably have
lots of those things to audit for before we can recommend running the
testsuite in an untrusted environment).

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org

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