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Thu, 06 Aug 2026 19:20:30 -0700 (PDT) From: Yuho Choi To: bhelgaas@google.com Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Yuho Choi Subject: [PATCH v1] PCI: Release SR-IOV device reference on init failure Date: Thu, 6 Aug 2026 22:20:25 -0400 Message-ID: <20260807022025.921764-1-dbgh9129@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit sriov_init() takes a reference on the sibling physical function stored in pci_sriov->dev before computing the maximum VF bus usage. If compute_max_vf_buses() fails, the failure path clears the SR-IOV state and frees pci_sriov without releasing that reference. Since is_physfn is cleared, pci_iov_release() cannot clean it up later. Release the reference on the failure path when pci_sriov->dev is different from the device being initialized, matching the cleanup in sriov_release(). Fixes: ea9a8854161d ("PCI: Set SR-IOV NumVFs to zero after enumeration") Signed-off-by: Yuho Choi --- drivers/pci/iov.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index b0d24839c084..65c60f88a3d4 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -907,6 +907,8 @@ static int sriov_init(struct pci_dev *dev, int pos) fail_max_buses: dev->sriov = NULL; dev->is_physfn = 0; + if (iov->dev != dev) + pci_dev_put(iov->dev); failed: for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { res = &dev->resource[pci_resource_num_from_vf_bar(i)]; -- 2.43.0