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KVM: selftests: Seed libc's RNG before using it to generate a seed for KVM's pRNG

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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.

Link: https://patch.msgid.link/20260626213534.3866178-6-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2026-06-26 14:35:18 -07:00
parent bae85cd758
commit 5506feb242
1 changed files with 2 additions and 0 deletions
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2
tools/testing/selftests/kvm/lib/kvm_util.c
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@ -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();