[PATCH v8 05/20] KVM: selftests: Seed libc's RNG before using it to generate a seed for KVM's pRNG

[Sean Christopherson]

Seed the RNG used by random() using the de facto standard method of
srand(time(0)), so that a different seed is actually used in each test run.
E.g. without seeding the RNG, literally every test on x86 will use
0x6b8b4567 to seed the KVM RNG.

Signed-off-by: Sean Christopherson <seanjc at google.com>
---
 tools/testing/selftests/kvm/lib/kvm_util.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 1016865d3f7a..277166ab1aa9 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -15,6 +15,7 @@
 #include <sys/resource.h>
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <time.h>
 #include <unistd.h>
 #include <linux/kernel.h>
 
@@ -2284,6 +2285,7 @@ void __attribute((constructor)) kvm_selftest_init(void)
 	sigaction(SIGILL, &sig_sa, NULL);
 	sigaction(SIGFPE, &sig_sa, NULL);
 
+	srandom(time(0));
 	kvm_seed_rng(random());
 
 	kvm_selftest_arch_init();
-- 
2.55.0.rc0.799.gd6f94ed593-goog