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KVM: PPC: Book3S HV: Set irqfd->producer only on success

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Set irqfd->producer only after kvmppc_set_passthru_irq() succeeds to
avoid leaving a dangling pointer on failure. The bypass manager does
not register a failed producer, so the pointer is never cleared.

Fixes: c57875f5f9 ("KVM: PPC: Book3S HV: Enable IRQ bypass")
Suggested-by: Sean Christopherson <seanjc@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: leixiang <leixiang@kylinos.cn>
Reviewed-by: Amit Machhiwal <amachhiw@linux.ibm.com>
Reviewed-by: Vaibhav Jain <vaibhav@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260709055755.31297-1-leixiang@kylinos.cn
This commit is contained in:
leixiang 2026-07-09 13:57:52 +08:00 committed by Madhavan Srinivasan
parent 10557fe7fc
commit 1144454ea2
1 changed files with 2 additions and 2 deletions
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4
arch/powerpc/kvm/book3s_hv.c
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@ -6140,12 +6140,12 @@ static int kvmppc_irq_bypass_add_producer_hv(struct irq_bypass_consumer *cons,
struct kvm_kernel_irqfd *irqfd =
container_of(cons, struct kvm_kernel_irqfd, consumer);
irqfd->producer = prod;
ret = kvmppc_set_passthru_irq(irqfd->kvm, prod->irq, irqfd->gsi);
if (ret)
pr_info("kvmppc_set_passthru_irq (irq %d, gsi %d) fails: %d\n",
prod->irq, irqfd->gsi, ret);
else
irqfd->producer = prod;
return ret;
}