diff options
| author | akepner <akepner@riverbed.com> | 2013-03-13 14:54:58 +0000 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2013-04-18 13:36:24 -0700 |
| commit | 499ab5ccbd42839f40d5572e7a4799c412986a11 (patch) | |
| tree | 7ab3fbc6098a52827b5fa5efb0e8188c6a5fda0f | |
| parent | c1cb0d3b569b1d21ada8666efb42dfd437617a09 (diff) | |
| download | linux-499ab5ccbd42839f40d5572e7a4799c412986a11.tar.bz2 | |
ixgbe: in shutdown, do netif_running() under rtnl_lock
During shutdown it's possible for __dev_close() (which holds
rtnl_lock) to clear the __LINK_STATE_START bit, and for ixgbe
to then read that bit (without holding rtnl_lock), and then
not fail to free irqs, etc. The result is a crash like this:
------------[ cut here ]------------
kernel BUG at drivers/pci/msi.c:313!
invalid opcode: 0000 [#1] SMP
last sysfs file: /sys/devices/system/cpu/cpu3/cache/index2/shared_cpu_map
CPU 1
Pid: 5910, comm: reboot Tainted: P ---------------- 2.6.32 #1 empty
RIP: 0010:[<ffffffff81305c2b>] [<ffffffff81305c2b>] free_msi_irqs+0x11b/0x130
RSP: 0018:ffff880185c9bc88 EFLAGS: 00010282
RAX: ffff880219f58bc0 RBX: ffff88021ac53b00 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000246 RDI: 000000000000004a
RBP: ffff880185c9bcc8 R08: 0000000000000002 R09: 0000000000000106
R10: 0000000000000000 R11: 0000000000000006 R12: ffff88021e524778
R13: 0000000000000001 R14: ffff88021e524000 R15: 0000000000000000
FS: 00007f90821b7700(0000) GS:ffff880028220000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00007f90818bd010 CR3: 0000000132c64000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process reboot (pid: 5910, threadinfo ffff880185c9a000, task ffff88021bf04a80)
Stack:
ffff880185c9bc98 000000018130529d ffff880185c9bcc8 ffff88021e524000
<0> 0000000000000004 ffff88021948c700 0000000000000000 ffff880185c9bda7
<0> ffff880185c9bce8 ffffffff81305cbd ffff880185c9bce8 ffff88021948c700
Call Trace:
[<ffffffff81305cbd>] pci_disable_msix+0x3d/0x50
[<ffffffffa00501d5>] ixgbe_reset_interrupt_capability+0x65/0x90 [ixgbe]
[<ffffffffa00512f6>] ixgbe_clear_interrupt_scheme+0xb6/0xd0 [ixgbe]
[<ffffffffa005330b>] __ixgbe_shutdown+0x5b/0x200 [ixgbe]
[<ffffffffa00534ca>] ixgbe_shutdown+0x1a/0x60 [ixgbe]
[<ffffffff812f6c7c>] pci_device_shutdown+0x2c/0x50
[<ffffffff813727fb>] device_shutdown+0x4b/0x160
[<ffffffff8107d98c>] kernel_restart_prepare+0x2c/0x40
ehci timer_action, mod_timer io_watchdog
[<ffffffff8107d9e6>] kernel_restart+0x16/0x60
[<ffffffff8107dbfd>] sys_reboot+0x1ad/0x200
[<ffffffff811676cf>] ? __d_free+0x3f/0x60
[<ffffffff81167748>] ? d_free+0x58/0x60
[<ffffffff8116f7c0>] ? mntput_no_expire+0x30/0x100
[<ffffffff81152b11>] ? __fput+0x191/0x200
[<ffffffff816565fe>] ? do_page_fault+0x3e/0xa0
[<ffffffff8100b132>] system_call_fastpath+0x16/0x1b
Code: 4c 89 ef e8 98 8c e3 ff 4d 39 f4 48 8b 43 10 75 cf 48 83 c4 18 5b 41 5c
41 5d 41 5e 41 5f c9 c3 49 8b 7d 20 e8 07 5a d3 ff eb c9 <0f> 0b 0f 1f 00 eb fb
66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00
ehci timer_action, mod_timer io_watchdog
RIP [<ffffffff81305c2b>] free_msi_irqs+0x11b/0x130
RSP <ffff880185c9bc88>
---[ end trace 27de882a0fe75593 ]---
(This was seen on a pretty old kernel/driver, but looks like
the same bug is still possible.)
Signed-off-by: <akepner@riverbed.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index 6bd1dd13682c..48f3fd501ac8 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -5123,14 +5123,14 @@ static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake) netif_device_detach(netdev); + rtnl_lock(); if (netif_running(netdev)) { - rtnl_lock(); ixgbe_down(adapter); ixgbe_free_irq(adapter); ixgbe_free_all_tx_resources(adapter); ixgbe_free_all_rx_resources(adapter); - rtnl_unlock(); } + rtnl_unlock(); ixgbe_clear_interrupt_scheme(adapter); |