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| author | Cong Wang <xiyou.wangcong@gmail.com> | 2020-05-02 22:22:19 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-05-04 12:05:56 -0700 |
| commit | 1a33e10e4a95cb109ff1145098175df3113313ef (patch) | |
| tree | a903d8645954f9d50e03c3f0b8a25479ec2f6985 /net/rose | |
| parent | ea84c842900872f5b8d6d4754cf0fa37d6672011 (diff) | |
| download | linux-1a33e10e4a95cb109ff1145098175df3113313ef.tar.gz linux-1a33e10e4a95cb109ff1145098175df3113313ef.tar.bz2 linux-1a33e10e4a95cb109ff1145098175df3113313ef.zip | |
net: partially revert dynamic lockdep key changes
This patch reverts the folowing commits:
commit 064ff66e2bef84f1153087612032b5b9eab005bd
"bonding: add missing netdev_update_lockdep_key()"
commit 53d374979ef147ab51f5d632dfe20b14aebeccd0
"net: avoid updating qdisc_xmit_lock_key in netdev_update_lockdep_key()"
commit 1f26c0d3d24125992ab0026b0dab16c08df947c7
"net: fix kernel-doc warning in <linux/netdevice.h>"
commit ab92d68fc22f9afab480153bd82a20f6e2533769
"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>
Diffstat (limited to 'net/rose')
| -rw-r--r-- | net/rose/af_rose.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c index 1e8eeb044b07..e7a872207b46 100644 --- a/net/rose/af_rose.c +++ b/net/rose/af_rose.c @@ -65,6 +65,26 @@ static const struct proto_ops rose_proto_ops; ax25_address rose_callsign; /* + * ROSE network devices are virtual network devices encapsulating ROSE + * frames into AX.25 which will be sent through an AX.25 device, so form a + * special "super class" of normal net devices; split their locks off into a + * separate class since they always nest. + */ +static struct lock_class_key rose_netdev_xmit_lock_key; + +static void rose_set_lockdep_one(struct net_device *dev, + struct netdev_queue *txq, + void *_unused) +{ + lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key); +} + +static void rose_set_lockdep_key(struct net_device *dev) +{ + netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL); +} + +/* * Convert a ROSE address into text. */ char *rose2asc(char *buf, const rose_address *addr) @@ -1511,6 +1531,7 @@ static int __init rose_proto_init(void) free_netdev(dev); goto fail; } + rose_set_lockdep_key(dev); dev_rose[i] = dev; } |