openvas 2.x race condition

openvas-server/openvas/oval_plugins.c
[...]
results_filename = "/tmp/results.xml";
if (g_file_test (results_filename, G_FILE_TEST_EXISTS))
{
log_write ("Found existing results file in %s, deleting it to
avoid conflicts.", results_filename);

it unlink /tmp/results.xml avoid symlink attack then spawn process
that write stuff to /tmp/results.xml

chinese apt can make symlink point to any system file during race and win race!

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