When writing some tests, I mistakenly attempted to auto-generate a UUID, which caused a segfault: virRandom was being used without calling virRandomInitialize. Make sure this case can't happen. Signed-off-by: Cole Robinson <crobinso(a)redhat.com&gt; --- src/util/util.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/src/util/util.c b/src/util/util.c index e5135fc..1554097 100644 --- a/src/util/util.c +++ b/src/util/util.c @@ -1910,6 +1910,7 @@ int virKillProcess(pid_t pid, int sig) } +static int random_initialized = 0; static char randomState[128]; static struct random_data randomData; static virMutex randomLock; @@ -1925,6 +1926,7 @@ int virRandomInitialize(unsigned int seed) &randomData) < 0) return -1; + random_initialized = 1; return 0; } @@ -1932,6 +1934,12 @@ int virRandom(int max) { int32_t ret; + if (!random_initialized) { + /* This can error, but what's worse? Unnoticed bogus random data or + * a segfault? */ + virRandomInitialize(time(NULL) ^ getpid()); + } + virMutexLock(&randomLock); random_r(&randomData, &ret); virMutexUnlock(&randomLock); -- 1.6.5.rc2