diff options
| author | Todd Fujinaka <todd.fujinaka@intel.com> | 2016-11-15 08:54:26 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-21 09:21:19 +0100 |
| commit | ba83011a470cc1246d24a41ca2fe6047799f27e7 (patch) | |
| tree | 738f57828b8d714b98522896cf12ca487678f4ce | |
| parent | 559a208028387ffb230f502f8137c278b311803b (diff) | |
igb: close/suspend race in netif_device_detach
[ Upstream commit 9474933caf21a4cb5147223dca1551f527aaac36 ]
Similar to ixgbe, when an interface is part of a namespace it is
possible that igb_close() may be called while __igb_shutdown() is
running which ends up in a double free WARN and/or a BUG in
free_msi_irqs().
Extend the rtnl_lock() to protect the call to netif_device_detach() and
igb_clear_interrupt_scheme() in __igb_shutdown() and check for
netif_device_present() to avoid calling igb_clear_interrupt_scheme() a
second time in igb_close().
Also extend the rtnl lock in igb_resume() to netif_device_attach().
Signed-off-by: Todd Fujinaka <todd.fujinaka@intel.com>
Acked-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/ethernet/intel/igb/igb_main.c | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index a481ea64e287..ff6e57d788eb 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -3172,7 +3172,9 @@ static int __igb_close(struct net_device *netdev, bool suspending) static int igb_close(struct net_device *netdev) { - return __igb_close(netdev, false); + if (netif_device_present(netdev)) + return __igb_close(netdev, false); + return 0; } /** @@ -7325,12 +7327,14 @@ static int __igb_shutdown(struct pci_dev *pdev, bool *enable_wake, int retval = 0; #endif + rtnl_lock(); netif_device_detach(netdev); if (netif_running(netdev)) __igb_close(netdev, true); igb_clear_interrupt_scheme(adapter); + rtnl_unlock(); #ifdef CONFIG_PM retval = pci_save_state(pdev); @@ -7450,16 +7454,15 @@ static int igb_resume(struct device *dev) wr32(E1000_WUS, ~0); - if (netdev->flags & IFF_UP) { - rtnl_lock(); + rtnl_lock(); + if (!err && netif_running(netdev)) err = __igb_open(netdev, true); - rtnl_unlock(); - if (err) - return err; - } - netif_device_attach(netdev); - return 0; + if (!err) + netif_device_attach(netdev); + rtnl_unlock(); + + return err; } static int igb_runtime_idle(struct device *dev) |