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KVM: x86: degrade WARN to pr_warn_ratelimited

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commit 3f16a5c318392cbb5a0c7a3d19dff8c8ef3c38ee upstream.

This warning can be triggered easily by userspace, so it should certainly not
cause a panic if panic_on_warn is set.

Reported-by: syzbot+c03f30b4f4c46bdf8575@syzkaller.appspotmail.com
Suggested-by: Alexander Potapenko <glider@google.com>
Acked-by: Alexander Potapenko <glider@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Paolo Bonzini 2019-06-26 14:16:13 +02:00 • committed by Greg Kroah-Hartman
parent c0309c7835
commit 2fec7f2e38
1 changed files with 3 additions and 3 deletions
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6
arch/x86/kvm/x86.c
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@ -1293,7 +1293,7 @@ static int set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale)
vcpu->arch.tsc_always_catchup = 1;
return 0;
} else {
WARN(1, "user requested TSC rate below hardware speed\n");
pr_warn_ratelimited("user requested TSC rate below hardware speed\n");
return -1;
}
}
@ -1303,8 +1303,8 @@ static int set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale)
user_tsc_khz, tsc_khz);
if (ratio == 0 || ratio >= kvm_max_tsc_scaling_ratio) {
WARN_ONCE(1, "Invalid TSC scaling ratio - virtual-tsc-khz=%u\n",
user_tsc_khz);
pr_warn_ratelimited("Invalid TSC scaling ratio - virtual-tsc-khz=%u\n",
user_tsc_khz);
return -1;
}