diff options
| author | Yu Zhao <yuzhao@google.com> | 2018-09-28 17:04:30 -0600 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-10-04 13:51:30 -0700 |
| commit | f7b2a56e1f3dcbdb4cf09b2b63e859ffe0e09df8 (patch) | |
| tree | 54258f407d1147571214229d9d88ff9343f33d0e | |
| parent | 9e15ff7b89b6d9c51c296499539ea884220ab590 (diff) | |
| download | linux-f7b2a56e1f3dcbdb4cf09b2b63e859ffe0e09df8.tar.bz2 | |
net/usb: cancel pending work when unbinding smsc75xx
Cancel pending work before freeing smsc75xx private data structure
during binding. This fixes the following crash in the driver:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000050
IP: mutex_lock+0x2b/0x3f
<snipped>
Workqueue: events smsc75xx_deferred_multicast_write [smsc75xx]
task: ffff8caa83e85700 task.stack: ffff948b80518000
RIP: 0010:mutex_lock+0x2b/0x3f
<snipped>
Call Trace:
smsc75xx_deferred_multicast_write+0x40/0x1af [smsc75xx]
process_one_work+0x18d/0x2fc
worker_thread+0x1a2/0x269
? pr_cont_work+0x58/0x58
kthread+0xfa/0x10a
? pr_cont_work+0x58/0x58
? rcu_read_unlock_sched_notrace+0x48/0x48
ret_from_fork+0x22/0x40
Signed-off-by: Yu Zhao <yuzhao@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/usb/smsc75xx.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/usb/smsc75xx.c b/drivers/net/usb/smsc75xx.c index e5a4cbb366dc..ec287c9741e8 100644 --- a/drivers/net/usb/smsc75xx.c +++ b/drivers/net/usb/smsc75xx.c @@ -1520,6 +1520,7 @@ static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf) { struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); if (pdata) { + cancel_work_sync(&pdata->set_multicast); netif_dbg(dev, ifdown, dev->net, "free pdata\n"); kfree(pdata); pdata = NULL; |