[PATCH 6.12 275/567] virtio: vdpa: Fix reference count leak in octep_sriov_enable()

Greg Kroah-Hartman
2026-01-06T17:29:28Z

From: Miaoqian Lin <linmq006@gmail.com>

commit b41ca62c0019de1321d75f2b2f274a28784a41ed upstream.

pci_get_device() will increase the reference count for the returned
pci_dev, and also decrease the reference count for the input parameter
from if it is not NULL.

If we break the loop in with 'vf_pdev' not NULL. We
need to call pci_dev_put() to decrease the reference count.

Found via static anlaysis and this is similar to commit c508eb042d97
("perf/x86/intel/uncore: Fix reference count leak in sad_cfg_iio_topology()")

Fixes: 8b6c724cdab8 ("virtio: vdpa: vDPA driver for Marvell OCTEON DPU devices")
Cc: stable@vger.kernel.org
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20251027060737.33815-1-linmq006@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/vdpa/octeon_ep/octep_vdpa_main.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/vdpa/octeon_ep/octep_vdpa_main.c
+++ b/drivers/vdpa/octeon_ep/octep_vdpa_main.c
@@ -692,6 +692,7 @@ static int octep_sriov_enable(struct pci
octep_vdpa_assign_barspace(vf_pdev, pdev, index);
if (++index == num_vfs) {
done = true;
+ pci_dev_put(vf_pdev);
break;
}
}