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From: "S. Gilles" <sgilles@terpmail.umd.edu>
Date: Tue, 21 Oct 2014 18:35:03 -0400
To: "S. Gilles" <sgilles@terpmail.umd.edu>
Cc: Larry Finger <Larry.Finger@lwfinger.net>,
	Chaoming Li <chaoming_li@realsil.com.cn>,
	linux-wireless@vger.kernel.org
Subject: Re: PROBLEM: Boot failure with bad RIP value
Message-ID: <20141021223503.GE14789@number18> (sfid-20141022_003516_898351_A07AE938)
References: <20141013234509.GD22088@number18>
 <543C9B66.6050705@lwfinger.net>
 <20141014041313.GF22088@number18>
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On Tue, Oct 14, 2014 at 12:13:13AM -0400, S. Gilles wrote:
> On Mon, Oct 13, 2014 at 10:41:26PM -0500, Larry Finger wrote:
> > On 10/13/2014 06:45 PM, S. Gilles wrote:
> > > (Sending this to the right people this time, hopefully.)
> > >
> > > I have been getting a consistent boot failure with 3.17, which I have
> > > bisected to
> > >
> > > 38506ecefab911785d5e1aa5889f6eeb462e0954 is the first bad commit
> > > commit 38506ecefab911785d5e1aa5889f6eeb462e0954
> > > Author: Larry Finger <Larry.Finger@lwfinger.net>
> > > Date:   Mon Sep 22 09:39:19 2014 -0500
> > >
> > >      rtlwifi: rtl_pci: Start modification for new drivers
> > >
> > >      Future patches will move the drivers for RTL8192EE and RTL8821AE
> > >      from staging to the regular wireless tree. Here, the necessary features
> > >      are added to the PCI driver. Other files are touched due to changes
> > >      in the various data structs.
> > >
> > >      Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
> > >      Signed-off-by: John W. Linville <linville@tuxdriver.com>
> > >
> > > The end of the trace (hand-retyped, so there may be errors that
> > > escaped me):
> > >
> > > R10: ffffffff825f2d80 R11: 0000000000000000 R12: ffff8800b4f107c0
> > > R13: ffff8800b4f124b8 R14: 0000000000001000 R15: ffff8800b4c7a000
> > > FS:  000007fc66c938700(0000) GS:ffff88013e200000(0000) knlGS:0000000000000000
> > > CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > > CR2: 0000000000000000 CR3: 00000000b5438000 CR4: 00000000000407f0
> > > Stack:
> > >   ffffffffa01e20d6 ffff8800b4f12420 ffff8800b4f107c0 ffff880137d7fcd0
> > >   ffffffffa01c97b5 ffff8800b4f107c0 ffff8800b4c7a8d0 0000000000000000
> > >   ffff880137d7fd30 ffffffff81577304 0000000000000000 ffff8800b4c7a8c0
> > > Call Trace:
> > >   [<ffffffffa01e20d6>] ? rtl_pci_start+0x2b/0x15f [rtl_pci]
> > >   [<ffffffffa01c97b5>] rtl_op_start+0x45/0x64 [rtlwifi]
> > >   [<ffffffff81577304>] ieee80211_do_open+0x152/0xb4b
> > >   [<ffffffff815b52bc>] ? mutex_unlock+0x9/0xb
> > >   [<ffffffff81577d4a>] ieee80211_open+0x4d/0x57
> > >   [<ffffffff8147df7f>] __dev_open+0x8b/0xcb
> > >   [<ffffffff8147e1e1>] __dev_change_flags+0xa4/0x13a
> > >   [<ffffffff8147e297>] dev_change_flags+0x20/0x53
> > >   [<ffffffff814d0204>] devinet_ioctl+0x269/0x568
> > >   [<ffffffff814d19b4>] inet_ioctl+0x81/0x9e
> > >   [<ffffffff814654e6>] sock_do_ioctl+0x20/0x3d
> > >   [<ffffffff81465a56>] sock_ioctl+0x20e/0x21a
> > >   [<ffffffff81136242>] do_vfs_ioctl+0x39e/0x467
> > >   [<ffffffff815b7277>] ? sysret_check+0x1b/0x56
> > >   [<ffffffff810965fe>] ? trace_hardirqs_on_caller+0x16e/0x18a
> > >   [<ffffffff81136343>] SyS_ioctl+0x38/0x5f
> > >   [<ffffffff815b7252>] system_call_fastpath+0x16/0x1b
> > > Code:  Bad RIP value.
> > > RIP  [<          (null)>]           (null)
> > >   RSP <ffff880137d7fc90>
> > > CR2: 0000000000000000
> > > ---[ end trace 7307d2524c1e640b ]---
> > >
> > > This is extremely easy to test (boot) and seems 100% reproducible.
> > >
> > > I have submitted Bug 86211 - Boot failure: Bad RIP value for rtl8192ce
> > > for this issue.
> > 
> > I am traveling and it may be a few days before I am able to make a suitable 
> > test. In the meantime, please post the appropriate stanza for the Realtek device 
> > from the output of
> > 
> > lspci -nn
> > 
> > There are several different devices that use driver rtl8192ce, and I need to 
> > know which one you have so that I can duplicate the problem.
> 
> Of course - I definitely should have mentioned that.
> 
> $ lspci -nn | grep RTL
> 03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter [10ec:8176] (rev 01)

Ping for this, just to make sure it doesn't fall off the radar.

-- 
S. Gilles