diff options
| author | Jouni Malinen <jkmaline@cc.hut.fi> | 2005-10-02 17:19:00 -0700 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-10-03 22:00:08 -0400 |
| commit | c355184cd3cd58c9ffc78f2a17e0ac3563312ea7 (patch) | |
| tree | f6de150b08f98540bf660cedffd77785ce75b479 /drivers/net/wireless/hostap/hostap_cs.c | |
| parent | f7a74447553d698795ba74b7e17e916000b0cb08 (diff) | |
| download | blackbird-op-linux-c355184cd3cd58c9ffc78f2a17e0ac3563312ea7.tar.gz blackbird-op-linux-c355184cd3cd58c9ffc78f2a17e0ac3563312ea7.zip | |
[PATCH] hostap: Do not free local->hw_priv before unregistering netdev
local->hw_priv was being freed and set to NULL just before calling
prism2_free_local_data(). However, this may expose a race condition in
which something ends up trying to use hw_priv during shutdown. I
haven't noticed this happening, but better be safe than sorry, so
let's postpone hw_priv freeing to happen only after
prism2_free_local_data() has returned.
Signed-off-by: Jouni Malinen <jkmaline@cc.hut.fi>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'drivers/net/wireless/hostap/hostap_cs.c')
| -rw-r--r-- | drivers/net/wireless/hostap/hostap_cs.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/net/wireless/hostap/hostap_cs.c b/drivers/net/wireless/hostap/hostap_cs.c index 23bcc51b7131..2643976a6677 100644 --- a/drivers/net/wireless/hostap/hostap_cs.c +++ b/drivers/net/wireless/hostap/hostap_cs.c @@ -565,13 +565,14 @@ static void prism2_detach(dev_link_t *link) *linkp = link->next; /* release net devices */ if (link->priv) { + struct hostap_cs_priv *hw_priv; struct net_device *dev; struct hostap_interface *iface; dev = link->priv; iface = netdev_priv(dev); - kfree(iface->local->hw_priv); - iface->local->hw_priv = NULL; + hw_priv = iface->local->hw_priv; prism2_free_local_data(dev); + kfree(hw_priv); } kfree(link); } |
