diff options
| author | Satyam Sharma <ssatyam@cse.iitk.ac.in> | 2007-07-18 02:54:19 -0700 |
|---|---|---|
| committer | Willy Tarreau <w@1wt.eu> | 2007-08-25 17:24:00 +0200 |
| commit | 1801acf87921d8e96ad87be0d43c868b57e53c11 (patch) | |
| tree | 1b6ddbc6a00244b2561347a25fa32e2c6f57745c /net | |
| parent | 676834f0a9091c428c63f5116657bd9944c35918 (diff) | |
[PATCH] Netpoll leak
[NETPOLL]: Fix a leak-n-bug in netpoll_cleanup()
93ec2c723e3f8a216dde2899aeb85c648672bc6b applied excessive duct tape to
the netpoll beast's netpoll_cleanup(), thus substituting one leak with
another, and opening up a little buglet :-)
net_device->npinfo (netpoll_info) is a shared and refcounted object and
cannot simply be set NULL the first time netpoll_cleanup() is called.
Otherwise, further netpoll_cleanup()'s see np->dev->npinfo == NULL and
become no-ops, thus leaking. And it's a bug too: the first call to
netpoll_cleanup() would thus (annoyingly) "disable" other (still alive)
netpolls too. Maybe nobody noticed this because netconsole (only user
of netpoll) never supported multiple netpoll objects earlier.
This is a trivial and obvious one-line fixlet.
Signed-off-by: Satyam Sharma <ssatyam@cse.iitk.ac.in>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/netpoll.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/core/netpoll.c b/net/core/netpoll.c index 522e44173e5..3431d485a98 100644 --- a/net/core/netpoll.c +++ b/net/core/netpoll.c @@ -776,7 +776,6 @@ void netpoll_cleanup(struct netpoll *np) spin_unlock_irqrestore(&npinfo->rx_lock, flags); } - np->dev->npinfo = NULL; if (atomic_dec_and_test(&npinfo->refcnt)) { skb_queue_purge(&npinfo->arp_tx); skb_queue_purge(&npinfo->txq); @@ -784,6 +783,7 @@ void netpoll_cleanup(struct netpoll *np) flush_scheduled_work(); kfree(npinfo); + np->dev->npinfo = NULL; } } |