diff options
| author | stephen hemminger <stephen@networkplumber.org> | 2017-03-22 14:51:00 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-03-22 19:38:56 -0700 |
| commit | 545a8e79bd1cc8774877a26275171a2ec8881c9e (patch) | |
| tree | b3e0a7cb5aa7d38dd61fa76c93bdf2cc7e0b2906 /drivers/net/hyperv/hyperv_net.h | |
| parent | 3071ada4916e26a8961c1b99f7766a73b9007bfc (diff) | |
| download | linux-545a8e79bd1cc8774877a26275171a2ec8881c9e.tar.bz2 | |
netvsc: use RCU to protect inner device structure
The netvsc driver has an internal structure (netvsc_device) which
is created when device is opened and released when device is closed.
And also opened/released when MTU or number of channels change.
Since this is referenced in the receive and transmit path, it is
safer to use RCU to protect/prevent use after free problems.
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/hyperv/hyperv_net.h')
| -rw-r--r-- | drivers/net/hyperv/hyperv_net.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h index a33f2ee86044..0ade21f95d71 100644 --- a/drivers/net/hyperv/hyperv_net.h +++ b/drivers/net/hyperv/hyperv_net.h @@ -686,7 +686,7 @@ struct net_device_context { /* point back to our device context */ struct hv_device *device_ctx; /* netvsc_device */ - struct netvsc_device *nvdev; + struct netvsc_device __rcu *nvdev; /* reconfigure work */ struct delayed_work dwork; /* last reconfig time */ @@ -780,6 +780,8 @@ struct netvsc_device { atomic_t open_cnt; struct netvsc_channel chan_table[VRSS_CHANNEL_MAX]; + + struct rcu_head rcu; }; static inline struct netvsc_device * |