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ethernet: sun: add check for the mdesc_grab()

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[ Upstream commit 90de546d9a0b3c771667af18bb3f80567eabb89b ]

In vnet_port_probe() and vsw_port_probe(), we should
check the return value of mdesc_grab() as it may
return NULL which can caused NPD bugs.

Fixes: 5d01fa0c6b ("ldmvsw: Add ldmvsw.c driver code")
Fixes: 43fdf27470 ("[SPARC64]: Abstract out mdesc accesses for better MD update handling.")
Signed-off-by: Liang He <windhl@126.com>
Reviewed-by: Piotr Raczynski <piotr.raczynski@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Liang He 2023-03-15 14:00:21 +08:00 committed by Greg Kroah-Hartman
parent 71da5991b6
commit 674fce59d6
2 changed files with 6 additions and 0 deletions
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3
drivers/net/ethernet/sun/ldmvsw.c
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@ -290,6 +290,9 @@ static int vsw_port_probe(struct vio_dev *vdev, const struct vio_device_id *id)
hp = mdesc_grab();
if (!hp)
return -ENODEV;
rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len);
err = -ENODEV;
if (!rmac) {

3
drivers/net/ethernet/sun/sunvnet.c
View File

@ -431,6 +431,9 @@ static int vnet_port_probe(struct vio_dev *vdev, const struct vio_device_id *id)
hp = mdesc_grab();
if (!hp)
return -ENODEV;
vp = vnet_find_parent(hp, vdev->mp, vdev);
if (IS_ERR(vp)) {
pr_err("Cannot find port parent vnet\n");