[PATCH 4.19 028/105] bnx2x: fix pci device refcount leak in bnx2x_vf_is_pcie_pending()

Greg Kroah-Hartman
2022-12-05T19:19:00Z

From: Yang Yingliang <yangyingliang@huawei.com>

[ Upstream commit 3637a29ccbb6461b7268c5c5db525935d510afc6 ]

As comment of pci_get_domain_bus_and_slot() says, it returns
a pci device with refcount increment, when finish using it,
the caller must decrement the reference count by calling
pci_dev_put(). Call pci_dev_put() before returning from
bnx2x_vf_is_pcie_pending() to avoid refcount leak.

Fixes: b56e9670ffa4 ("bnx2x: Prepare device and initialize VF database")
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Link: https://lore.kernel.org/r/20221119070202.1407648-1-yangyingliang@huawei.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
index b3ff8d13c31a..83868f49b6c7 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
@@ -806,16 +806,20 @@ static void bnx2x_vf_enable_traffic(struct bnx2x *bp, struct bnx2x_virtf *vf)

static u8 bnx2x_vf_is_pcie_pending(struct bnx2x *bp, u8 abs_vfid)
{
- struct pci_dev *dev;
struct bnx2x_virtf *vf = bnx2x_vf_by_abs_fid(bp, abs_vfid);
+ struct pci_dev *dev;
+ bool pending;

if (!vf)
return false;

dev = pci_get_domain_bus_and_slot(vf->domain, vf->bus, vf->devfn);
- if (dev)
- return bnx2x_is_pcie_pending(dev);
- return false;
+ if (!dev)
+ return false;
+ pending = bnx2x_is_pcie_pending(dev);
+ pci_dev_put(dev);
+
+ return pending;
}

int bnx2x_vf_flr_clnup_epilog(struct bnx2x *bp, u8 abs_vfid)
--
2.35.1