KVM: s390: pci: Fix NULL dereference on AIBV allocation failure

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The airq_iv_create() can return NULL on failure, but the return value was
never checked. If it fails, zdev->aibv will be NULL and fail when
dereferenced in kvm_zpci_set_airq(). Add a NULL check and free the
previously allocated AISB bit and zdev->aisb on failure.

Fixes: 3c5a1b6f0a ("KVM: s390: pci: provide routines for enabling/disabling interrupt forwarding")
Cc: stable@vger.kernel.org
Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Farhan Ali <alifm@linux.ibm.com>
Tested-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>

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Farhan Ali 2026-07-23 15:14:07 -07:00 • committed by Christian Borntraeger

parent f86842e4d6

commit 8bf09b9b7d

1 changed files with 8 additions and 0 deletions

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arch/s390/kvm/pci.c

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