linux-kernel - [PATCH] e1000e: x86: e1000 driver trying to free already-free irq.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 17 Oct 2016 09:51:08 -0700
From:   David Singleton <davsingl@...co.com>
To:     Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Cc:     khalidm <khalidm@...co.com>, intel-wired-lan@...ts.osuosl.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] e1000e: x86: e1000 driver trying to free already-free irq.

From: khalidm <khalidm@...co.com>

During systemd reboot sequence network driver interface is shutdown
by e1000_close. The PCI driver interface is shut by e1000_shutdown.
The e1000_shutdown checks for netif_running status, if still up it
brings down driver. But it disables msi outside of this if statement,
regardless of netif status. All this is OK when e1000_close happens
after shutdown. However, by default, everything in systemd is done
in parallel. This creates a conditions where e1000_shutdown is called
after e1000_close, therefore hitting BUG_ON assert in free_msi_irqs.

Cc-Id: xe-kernel@...ernal.cisco.com
Signed-off-by: khalidm <khalidm@...co.com>
Signed-off-by: David Singleton <davsingl@...co.com>
---
 drivers/net/ethernet/intel/e1000e/netdev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 7017281..79f02a6 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -6283,8 +6283,8 @@ static int e1000e_pm_freeze(struct device *dev)
 		/* Quiesce the device without resetting the hardware */
 		e1000e_down(adapter, false);
 		e1000_free_irq(adapter);
+		e1000e_reset_interrupt_capability(adapter);
 	}
-	e1000e_reset_interrupt_capability(adapter);

 	/* Allow time for pending master requests to run */
 	e1000e_disable_pcie_master(&adapter->hw);
-- 
2.9.3