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net: partially revert dynamic lockdep key changes

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This patch reverts the folowing commits:

commit 064ff66e2b
"bonding: add missing netdev_update_lockdep_key()"

commit 53d374979e
"net: avoid updating qdisc_xmit_lock_key in netdev_update_lockdep_key()"

commit 1f26c0d3d2
"net: fix kernel-doc warning in <linux/netdevice.h>"

commit ab92d68fc2
"net: core: add generic lockdep keys"

but keeps the addr_list_lock_key because we still lock
addr_list_lock nestedly on stack devices, unlikely xmit_lock
this is safe because we don't take addr_list_lock on any fast
path.

Reported-and-tested-by: syzbot+aaa6fa4949cc5d9b7b25@syzkaller.appspotmail.com
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Cong Wang
2020-05-02 22:22:19 -07:00
committed by David S. Miller
parent ea84c84290
commit 1a33e10e4a
22 changed files with 294 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
include/linux/netdevice.h
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@@ -1805,13 +1805,11 @@ enum netdev_priv_flags {
* @phydev: Physical device may attach itself
* for hardware timestamping
* @sfp_bus: attached &struct sfp_bus structure.
* @qdisc_tx_busylock_key: lockdep class annotating Qdisc->busylock
* spinlock
* @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
* @qdisc_xmit_lock_key: lockdep class annotating
* netdev_queue->_xmit_lock spinlock
*
* @addr_list_lock_key: lockdep class annotating
* net_device->addr_list_lock spinlock
* @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock
* @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
*
* @proto_down: protocol port state information can be sent to the
* switch driver and used to set the phys state of the
@@ -2112,10 +2110,9 @@ struct net_device {
#endif
struct phy_device *phydev;
struct sfp_bus *sfp_bus;
struct lock_class_key qdisc_tx_busylock_key;
struct lock_class_key qdisc_running_key;
struct lock_class_key qdisc_xmit_lock_key;
struct lock_class_key addr_list_lock_key;
struct lock_class_key *qdisc_tx_busylock;
struct lock_class_key *qdisc_running_key;
bool proto_down;
unsigned wol_enabled:1;
@@ -2200,6 +2197,20 @@ static inline void netdev_for_each_tx_queue(struct net_device *dev,
f(dev, &dev->_tx[i], arg);
}
#define netdev_lockdep_set_classes(dev) \
{ \
static struct lock_class_key qdisc_tx_busylock_key; \
static struct lock_class_key qdisc_running_key; \
static struct lock_class_key qdisc_xmit_lock_key; \
unsigned int i; \
\
(dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \
(dev)->qdisc_running_key = &qdisc_running_key; \
for (i = 0; i < (dev)->num_tx_queues; i++) \
lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \
&qdisc_xmit_lock_key); \
}
u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb,
struct net_device *sb_dev);
struct netdev_queue *netdev_core_pick_tx(struct net_device *dev,