[PATCH] RDMA/usnic: Fix memleak in find_free_vf_and_create_qp_grp

[PATCH] RDMA/usnic: Fix memleak in find_free_vf_and_create_qp_grp

[Dinghao Liu]

If usnic_ib_qp_grp_create() fails at the first call, dev_list
will not be freed on error, which leads to memleak.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---
 drivers/infiniband/hw/usnic/usnic_ib_verbs.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/infiniband/hw/usnic/usnic_ib_verbs.c b/drivers/infiniband/hw/usnic/usnic_ib_verbs.c
index 38a37770c016..3705c6b8b223 100644
--- a/drivers/infiniband/hw/usnic/usnic_ib_verbs.c
+++ b/drivers/infiniband/hw/usnic/usnic_ib_verbs.c
@@ -214,6 +214,7 @@ find_free_vf_and_create_qp_grp(struct usnic_ib_dev *us_ibdev,
 
 		}
 		usnic_uiom_free_dev_list(dev_list);
+		dev_list = NULL;
 	}
 
 	/* Try to find resources on an unused vf */
@@ -239,6 +240,8 @@ find_free_vf_and_create_qp_grp(struct usnic_ib_dev *us_ibdev,
 qp_grp_check:
 	if (IS_ERR_OR_NULL(qp_grp)) {
 		usnic_err("Failed to allocate qp_grp\n");
+		if (usnic_ib_share_vf)
+			usnic_uiom_free_dev_list(dev_list);
 		return ERR_PTR(qp_grp ? PTR_ERR(qp_grp) : -ENOMEM);
 	}
 	return qp_grp;
-- 
2.17.1

Re: [PATCH] RDMA/usnic: Fix memleak in find_free_vf_and_create_qp_grp

[Leon Romanovsky]

On Sat, Dec 26, 2020 at 03:42:48PM +0800, Dinghao Liu wrote:
> If usnic_ib_qp_grp_create() fails at the first call, dev_list
> will not be freed on error, which leads to memleak.
>
> Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
> ---
>  drivers/infiniband/hw/usnic/usnic_ib_verbs.c | 3 +++
>  1 file changed, 3 insertions(+)
>

Fixes: e3cf00d0a87f ("IB/usnic: Add Cisco VIC low-level hardware driver")

Thanks,
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>

Re: [PATCH] RDMA/usnic: Fix memleak in find_free_vf_and_create_qp_grp

[Jason Gunthorpe]

On Sat, Dec 26, 2020 at 03:42:48PM +0800, Dinghao Liu wrote:
> If usnic_ib_qp_grp_create() fails at the first call, dev_list
> will not be freed on error, which leads to memleak.
> 
> Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
> Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
> ---
>  drivers/infiniband/hw/usnic/usnic_ib_verbs.c | 3 +++
>  1 file changed, 3 insertions(+)

Applied to for-rc with

Fixes: e3cf00d0a87f ("IB/usnic: Add Cisco VIC low-level hardware driver")

Thanks,
Jason