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KVM: Don't BUG() the kernel if xa_insert() fails with -EBUSY

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WARN once instead of triggering a BUG if xa_insert() fails because it
encountered an existing entry.  While KVM guarantees there should be no
existing entry, there's no reason to BUG the kernel, as KVM needs to
gracefully handle failure anyways.

Reviewed-by: Pankaj Gupta <pankaj.gupta@amd.com>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20241009150455.1057573-6-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson
2024-10-09 08:04:54 -07:00
parent d0831edcd8
commit e53dc37f5a
1 changed files with 1 additions and 1 deletions
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2
virt/kvm/kvm_main.c
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@@ -4129,7 +4129,7 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, unsigned long id)
vcpu->vcpu_idx = atomic_read(&kvm->online_vcpus);
r = xa_insert(&kvm->vcpu_array, vcpu->vcpu_idx, vcpu, GFP_KERNEL_ACCOUNT);
BUG_ON(r == -EBUSY);
WARN_ON_ONCE(r == -EBUSY);
if (r)
goto unlock_vcpu_destroy;