[PATCH AUTOSEL 4.4 3/4] KVM: x86: degrade WARN to pr_warn_ratelimited

[Sasha Levin]

From: Paolo Bonzini <pbonz...@redhat.com>

[ Upstream commit 3f16a5c318392cbb5a0c7a3d19dff8c8ef3c38ee ]

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+c03f30b4f4c46bdf8...@syzkaller.appspotmail.com
Suggested-by: Alexander Potapenko <gli...@google.com>
Acked-by: Alexander Potapenko <gli...@google.com>
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 arch/x86/kvm/x86.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 516d8b1562c8..d89000e48c34 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -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;
        }
 
-- 
2.20.1