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| author |   YueHaibing <yuehaibing@huawei.com> | 2019-03-19 10:16:53 +0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-03-19 13:45:58 -0700 |
| commit | a3e23f719f5c4a38ffb3d30c8d7632a4ed8ccd9e (patch) | |
| tree | 18873532e319e52799711a7bfc4bd1e8d69787c4 /net/core | |
| parent | net: stmmac: fix memory corruption with large MTUs (diff) | |
| download | linux-dev-a3e23f719f5c4a38ffb3d30c8d7632a4ed8ccd9e.tar.xz linux-dev-a3e23f719f5c4a38ffb3d30c8d7632a4ed8ccd9e.zip | |
net-sysfs: call dev_hold if kobject_init_and_add success
In netdev_queue_add_kobject and rx_queue_add_kobject,
if sysfs_create_group failed, kobject_put will call
netdev_queue_release to decrease dev refcont, however
dev_hold has not be called. So we will see this while
unregistering dev:
unregister_netdevice: waiting for bcsh0 to become free. Usage count = -1
Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: d0d668371679 ("net: don't decrement kobj reference count on init failure")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/net-sysfs.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c index 4ff661f6f989..8f8b7b6c2945 100644 --- a/net/core/net-sysfs.c +++ b/net/core/net-sysfs.c @@ -928,6 +928,8 @@ static int rx_queue_add_kobject(struct net_device *dev, int index) if (error) return error; + dev_hold(queue->dev); + if (dev->sysfs_rx_queue_group) { error = sysfs_create_group(kobj, dev->sysfs_rx_queue_group); if (error) { @@ -937,7 +939,6 @@ static int rx_queue_add_kobject(struct net_device *dev, int index) } kobject_uevent(kobj, KOBJ_ADD); - dev_hold(queue->dev); return error; } @@ -1464,6 +1465,8 @@ static int netdev_queue_add_kobject(struct net_device *dev, int index) if (error) return error; + dev_hold(queue->dev); + #ifdef CONFIG_BQL error = sysfs_create_group(kobj, &dql_group); if (error) { @@ -1473,7 +1476,6 @@ static int netdev_queue_add_kobject(struct net_device *dev, int index) #endif kobject_uevent(kobj, KOBJ_ADD); - dev_hold(queue->dev); return 0; } |