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Date:   Wed, 20 Dec 2017 16:24:27 -0800
From:   Eric Biggers <>
        Eric Biggers <>
Subject: [PATCH linux-next] KVM: x86: don't forget vcpu_put() in kvm_arch_vcpu_ioctl_set_sregs()

From: Eric Biggers <>

Due to a bad merge resolution between commit f29810335965 ("KVM/x86:
Check input paging mode when cs.l is set") and commit b4ef9d4e8cb8
("KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_set_sregs"),
there is a case in kvm_arch_vcpu_ioctl_set_sregs() where vcpu_put() is
not called after vcpu_get().  Fix it.

Reported-by: syzbot <>
Signed-off-by: Eric Biggers <>
 arch/x86/kvm/x86.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index ea3a98196753..f4e8b5089b28 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7624,7 +7624,7 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 		goto out;
 	if (kvm_valid_sregs(vcpu, sregs))
-		return -EINVAL;
+		goto out; = sregs->apic_base;
 	apic_base_msr.host_initiated = true;

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