Date:	Fri, 10 Aug 2012 08:09:00 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Roland Dreier <roland@...nel.org>
Cc:	linux-rdma@...r.kernel.org, Parav Pandit <parav.pandit@...lex.com>,
	Sean Hefty <sean.hefty@...el.com>, linux-kernel@...r.kernel.org
Subject: Re: BUG: RDMA/ocrdma calls invalid vlan_dev_real_dev()

On Thu, Aug 09, 2012 at 04:54:37PM -0700, Roland Dreier wrote:
> thanks for the report.  I assume the system doesn't actually have ocrdma hw?

Yeah, it's a test boot inside KVM.

Thanks,
Fengguang

> - R.
> On Aug 9, 2012 3:00 AM, "Fengguang Wu" <fengguang.wu@...el.com> wrote:
> 
> > Hi Parav,
> >
> > commit fe2caefcdf ("RDMA/ocrdma: Add driver for Emulex OneConnect IBoE
> > RDMA adapter") triggers the below kernel BUG for the attached config.
> >
> > [  280.861196] kernel BUG at
> > /c/kernel-tests/src/stable/include/linux/if_vlan.h:113!
> > [  280.861196] invalid opcode: 0000 [#1] PREEMPT
> > [  280.861196] CPU 0
> > [  280.861196] Pid: 304, comm: ip Not tainted 3.6.0-rc1 #1 Bochs Bochs
> > [  280.861196] RIP: 0010:[<ffffffff816df084>]  [<ffffffff816df084>]
> > ocrdma_inet6addr_event+0x4/0x6
> > [  280.861196] RSP: 0018:ffff8800066a1548  EFLAGS: 00000202
> > [  280.861196] RAX: 0000000000000001 RBX: 0000000000000000 RCX:
> > 00000000ffffffff
> > [  280.861196] RDX: ffff880006b6b400 RSI: 0000000000000001 RDI:
> > ffffffff8207ecc0
> > [  280.861196] RBP: ffff8800066a1548 R08: 0000000000000000 R09:
> > ffffffff8109b657
> > [  280.861196] R10: ffffffff00000000 R11: ffffffff81e0f318 R12:
> > 00000000ffffffff
> > [  280.861196] R13: ffffffff8207ecc0 R14: 0000000000000000 R15:
> > 0000000000000000
> > [  280.861196] FS:  00007f025c12f700(0000) GS:ffffffff81dfb000(0000)
> > knlGS:0000000000000000
> > [  280.861196] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> > [  280.861196] CR2: 00007fe4e1d30000 CR3: 0000000006b65000 CR4:
> > 00000000000006b0
> > [  280.861196] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> > 0000000000000000
> > [  280.861196] DR3: 0000000000000000 DR6: 0000000000000000 DR7:
> > 0000000000000000
> > [  280.861196] Process ip (pid: 304, threadinfo ffff8800066a0000, task
> > ffff880006a7c2c0)
> > [  280.861196] Stack:
> > [  280.861196]  ffff8800066a1598 ffffffff8109b5a2 ffff880006b6b400
> > 0000000000000001
> > [  280.861196]  ffff8800066a1598 0000000000000001 ffff880006b6b400
> > 00000000ffffffff
> > [  280.861196]  0000000000000000 ffffffff820ad9b0 ffff8800066a15f8
> > ffffffff8109b6b7
> > [  280.861196] Call Trace:
> > [  280.861196]  [<ffffffff8109b5a2>] notifier_call_chain+0x60/0x90
> > [  280.861196]  [<ffffffff8109b6b7>] __atomic_notifier_call_chain+0x60/0x92
> > [  280.861196]  [<ffffffff8109b657>] ?
> > atomic_notifier_chain_unregister+0x46/0x46
> > [  280.861196]  [<ffffffff8109b6f8>] atomic_notifier_call_chain+0xf/0x11
> > [  280.861196]  [<ffffffff81898dbc>] ipv6_add_addr+0x333/0x388
> > [  280.861196]  [<ffffffff81898ade>] ? ipv6_add_addr+0x55/0x388
> > [  280.861196]  [<ffffffff8189be09>] add_addr+0x12/0x5c
> > [  280.861196]  [<ffffffff8189c0ff>] init_loopback+0x7b/0x7f
> > [  280.861196]  [<ffffffff8189d25a>] addrconf_notify+0x178/0x2d4
> > [  280.861196]  [<ffffffff8109b5a2>] notifier_call_chain+0x60/0x90
> > [  280.861196]  [<ffffffff8109b87a>] __raw_notifier_call_chain+0x9/0xb
> > [  280.861196]  [<ffffffff8109b88b>] raw_notifier_call_chain+0xf/0x11
> > [  280.861196]  [<ffffffff817dfac6>] call_netdevice_notifiers+0x45/0x4a
> > [  280.861196]  [<ffffffff817e2bbd>] __dev_notify_flags+0x32/0x56
> > [  280.861196]  [<ffffffff817e2c24>] dev_change_flags+0x43/0x4e
> > [  280.861196]  [<ffffffff817ef770>] do_setlink+0x2da/0x7f6
> > [  280.861196]  [<ffffffff81033fba>] ? native_sched_clock+0x38/0x68
> > [  280.861196]  [<ffffffff81033ff3>] ? sched_clock+0x9/0xd
> > [  280.861196]  [<ffffffff810a0326>] ?
> > sched_clock_local.constprop.2+0xd/0x78
> > [  280.861196]  [<ffffffff810a043a>] ? sched_clock_cpu+0x7b/0x89
> > [  280.861196]  [<ffffffff817f02cf>] rtnl_newlink+0x264/0x438
> > [  280.861196]  [<ffffffff817f0125>] ? rtnl_newlink+0xba/0x438
> > [  280.861196]  [<ffffffff8125a98a>] ? avc_has_perm_noaudit+0xd1/0xe3
> > [  280.861196]  [<ffffffff8125a8db>] ? avc_has_perm_noaudit+0x22/0xe3
> > [  280.861196]  [<ffffffff817ee988>] rtnetlink_rcv_msg+0x22c/0x23b
> > [  280.861196]  [<ffffffff817ee720>] ? rtnl_lock+0x12/0x14
> > [  280.861196]  [<ffffffff817ee75c>] ? __rtnl_unlock+0x12/0x12
> > [  280.861196]  [<ffffffff8181e535>] netlink_rcv_skb+0x3d/0x8a
> > [  280.861196]  [<ffffffff817ee743>] rtnetlink_rcv+0x21/0x28
> > [  280.861196]  [<ffffffff8181d2a4>] netlink_unicast+0x12c/0x1b8
> > [  280.861196]  [<ffffffff8181d8f5>] netlink_sendmsg+0x212/0x29a
> > [  280.861196]  [<ffffffff817cf525>] sock_sendmsg+0x9e/0xbf
> > [  280.861196]  [<ffffffff817cf78e>] __sys_sendmsg+0x248/0x2d5
> > [  280.861196]  [<ffffffff819c2107>] ? _raw_spin_unlock_irq+0x34/0x50
> > [  280.861196]  [<ffffffff8109dc1d>] ?
> > finish_task_switch.constprop.48+0x72/0xd9
> > [  280.861196]  [<ffffffff8109dbdf>] ?
> > finish_task_switch.constprop.48+0x34/0xd9
> > [  280.861196]  [<ffffffff819c0ed9>] ? __schedule+0x501/0x607
> > [  280.861196]  [<ffffffff810b1d85>] ? put_lock_stats.isra.17+0xe/0x28
> > [  280.861196]  [<ffffffff810b1e6c>] ? lock_release_holdtime+0xcd/0xd5
> > [  280.861196]  [<ffffffff817d0a96>] sys_sendmsg+0x3d/0x5e
> > [  280.861196]  [<ffffffff819c3377>] system_call_fastpath+0x16/0x1b
> > [  280.861196] Code: 00 00 ad de 48 89 93 a8 0b 00 00 e8 c9 2f 2e 00 48 8d
> > bb b0 0b 00 00 48 c7 c6 86 f0 6d 81 e8 b0 b2 9e ff 59 5b 5d c3 55 48 89 e5
> > <0f> 0b 55 48 89 e5 41 54 53 48 89 fb 48 8b bf a0 fc ff ff 4c 8d
> > [  280.861196] RIP  [<ffffffff816df084>] ocrdma_inet6addr_event+0x4/0x6
> > [  280.861196]  RSP <ffff8800066a1548>
> >
> > Thanks,
> > Fengguang
> >
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