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Date: Fri, 14 Jun 2013 08:45:48 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: nirinA raseliarison <nirina.raseliarison@...il.com>
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Francois Romieu <romieu@...zoreil.com>, nic_swsd@...ltek.com,
Ming Lei <ming.lei@...onical.com>,
Hayes Wang <hayeswang@...ltek.com>
Subject: Re: BUG: unable to handle kernel NULL pointer dereference at
0000000000000040
On Fri, Jun 14, 2013 at 08:30:29AM -0600, Bjorn Helgaas wrote:
> [+cc Ming, Hayes, Francois, r8169 list]
>
> On Fri, Jun 14, 2013 at 6:49 AM, nirinA raseliarison
> <nirina.raseliarison@...il.com> wrote:
> > hello there,
> > i have this ethernet controler:
> >
> > Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet
> > controller (rev 05)
> >
> > that uses the r8169 module.
> > it works fine, but sometimes after a reboot and issueing:
> >
> > ifconfig eth0 192.168.1.1 up
> >
> > i got the message below. after another reboot the
> > message disappears. i also get the same message this 3.9.5 and 3.9.4.
> >
> > it seems i catch my first oops and don't know what to do with it.
> > currently running:
> >
> > cat /proc/version
> > Linux version 3.9.6.20130614 (root@...ernova) (gcc version 4.8.1 (GCC) ) #1
> > SMP Fri Jun 14 09:14:50 EAT 2013
> >
> > uname -a
> > Linux supernova 3.9.6.20130614 #1 SMP Fri Jun 14 09:14:50 EAT 2013 x86_64
> > Intel(R) Celeron(R) CPU G1610 @ 2.60GHz GenuineIntel GNU/Linux
> >
> > thanks,
> > -----------------8<------------------------------8<---------------------------------------
> >
> > [ 57.877560] BUG: unable to handle kernel NULL pointer dereference at
> > 0000000000000040
> > [ 57.877603] IP: [<ffffffff81491844>] fw_load_abort.isra.5+0x4/0x20
> > [ 57.877634] PGD 21330a067 PUD 211a3a067 PMD 0
> > [ 57.877660] Oops: 0002 [#1] SMP
> > [ 57.877681] Modules linked in: fuse coretemp kvm_intel kvm evdev r8169
> > microcode mii
> > [ 57.877735] CPU 0
> > [ 57.877746] Pid: 1950, comm: firmware Not tainted 3.9.6.20130614 #1 To be
> > filled by O.E.M. To be filled by O.E.M./ONDA H61V Ver:4.01
> > [ 57.877790] RIP: 0010:[<ffffffff81491844>] [<ffffffff81491844>]
> > fw_load_abort.isra.5+0x4/0x20
> > [ 57.877824] RSP: 0018:ffff8802119a7e80 EFLAGS: 00010246
> > [ 57.877844] RAX: ffff8802158fe250 RBX: ffff880211a03b40 RCX:
> > 0000000000000000
> > [ 57.877869] RDX: ffffffff81c742c8 RSI: ffff8802158fe250 RDI:
> > 0000000000000000
> > [ 57.877895] RBP: ffff8802119a7e80 R08: ffff8802119a6000 R09:
> > 00000000000005aa
> > [ 57.877920] R10: 0000000000000000 R11: 0000000000000000 R12:
> > ffffffffffffffff
> > [ 57.877945] R13: ffff880213d34088 R14: 0000000000000003 R15:
> > ffff88020eafc230
> > [ 57.877970] FS: 00007f3c6cb2a740(0000) GS:ffff88021f200000(0000)
> > knlGS:0000000000000000
> > [ 57.877998] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > [ 57.878019] CR2: 0000000000000040 CR3: 0000000203155000 CR4:
> > 00000000001407f0
> > [ 57.878044] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> > 0000000000000000
> > [ 57.878069] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
> > 0000000000000400
> > [ 57.878094] Process firmware (pid: 1950, threadinfo ffff8802119a6000,
> > task ffff8802158fe250)
> > [ 57.878124] Stack:
> > [ 57.878133] ffff8802119a7eb0 ffffffff81491917 ffff880211a4d5a0
> > 0000000000000003
> > [ 57.878168] ffff8802119a7f50 ffffffff818765a0 ffff8802119a7ec0
> > ffffffff81483063
> > [ 57.878203] ffff8802119a7f08 ffffffff8119bc9e ffff880213d34098
> > ffff880211a4d5c0
> > [ 57.878237] Call Trace:
> > [ 57.878251] [<ffffffff81491917>] firmware_loading_store+0x77/0x150
> > [ 57.878275] [<ffffffff81483063>] dev_attr_store+0x13/0x20
> > [ 57.878297] [<ffffffff8119bc9e>] sysfs_write_file+0xce/0x140
> > [ 57.878320] [<ffffffff81133e8a>] vfs_write+0x9a/0x160
> > [ 57.878340] [<ffffffff81134164>] sys_write+0x44/0x90
> > [ 57.878360] [<ffffffff817d70ed>] system_call_fastpath+0x1a/0x1f
> > [ 57.879379] Code: 6b ff ff ff 48 89 df 31 db e8 b9 b0 c9 ff e9 79 ff ff
> > ff 0f 1f 40 00 48 83 c4 10 5b 41 5c 41 5d 41 5e 5d c3 0f 1f 00 55 48 89 e5
> > <f0> 80 4f 40 04 48 83 c7 18 e8 8e a9 bd ff 5d c3 66 66 66 2e 0f
> > [ 57.881753] RIP [<ffffffff81491844>] fw_load_abort.isra.5+0x4/0x20
> > [ 57.882888] RSP <ffff8802119a7e80>
> > [ 57.884019] CR2: 0000000000000040
> > [ 57.885166] ---[ end trace 6705f6d4ce6b6a12 ]---
> >
Please try the following patch.
[ Bjorn, sorry I dropped you from the recipient list, but unfortunately
Google still considers me to be a spammer and doesn't let me send any
e-mail to you ]
Guenter
----------
>From 9feae0b1b33721573c41fbf2323db2a12c34c725 Mon Sep 17 00:00:00 2001
From: Guenter Roeck <linux@...ck-us.net>
Date: Fri, 14 Jun 2013 08:39:06 -0700
Subject: [PATCH] firmware: Fix race condition in firmware_loading_store
Fix:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000040
IP: [<ffffffff81491844>] fw_load_abort.isra.5+0x4/0x20
...
Call Trace:
[<ffffffff81491917>] firmware_loading_store+0x77/0x150
[<ffffffff81483063>] dev_attr_store+0x13/0x20
[<ffffffff8119bc9e>] sysfs_write_file+0xce/0x140
[<ffffffff81133e8a>] vfs_write+0x9a/0x160
[<ffffffff81134164>] sys_write+0x44/0x90
[<ffffffff817d70ed>] system_call_fastpath+0x1a/0x1f
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
drivers/base/firmware_class.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 4b1f926..f34b489 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -570,12 +570,13 @@ static ssize_t firmware_loading_store(struct device *dev,
const char *buf, size_t count)
{
struct firmware_priv *fw_priv = to_firmware_priv(dev);
- struct firmware_buf *fw_buf = fw_priv->buf;
int loading = simple_strtol(buf, NULL, 10);
+ struct firmware_buf *fw_buf;
int i;
mutex_lock(&fw_lock);
+ fw_buf = fw_priv->buf;
if (!fw_buf)
goto out;
--
1.7.9.7
--
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