From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mark Hansen <meh@winfirst.com>
Date: Wed, 08 Apr 2015 18:03:18 +0000
Subject: [lm-sensors] Kernel Panic when running sensors on new CentOS kernel (3.10.0-229.1.2)
Message-Id: <55256D66.1000400@winfirst.com>
List-Id: <lm-sensors.vger.kernel.org>
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To: lm-sensors@vger.kernel.org

lm-sensors team,

First, thank you very much for all your work providing us with such a usefu=
l and necessary
tool.

I've just upgraded my CentOS system from 7.0.1406 to 7.1.1503 (kernel: 3.10=
.0-229.1.2).

The upgrade seemed to go without any problems, but since then the machine h=
as been rebooting
at what looked like regular intervals. If I boot on the previous kernel (3.=
10.0-123.20.1),
the problem doesn't occur.

I've narrowed the problem down to what looks like a kernel panic whenever t=
he 'sensors' command
is run (from the lm_sensors-3.3.4-11 package). Note that sensors has been r=
unning fine with
this configuration for several months. Only after upgrading the O/S to 7.1 =
did it start having
this problem. I haven't made any other configuration changes to the sensors=
 package.

Each time this happens, there is a lot of information written to the screen=
 that is gone before
I can get a good look at it. I took a picture of the screen right when I ra=
n the sensors command
and found that the information is also written to the vcore-dmesg.txt file =
that is left in the
/var/crash/<IP-date-time> directory (along with a vcore file). The last par=
t of the text file
is shown below.

Based on the information (shown below) it seems the sensors command is havi=
ng a problem when
trying to read the sensor chip on the Radeon display card.

The motherboard in the machine is an ASUS M5A97 R2.0
The display adapter is an "XFX Radeon AMD ONE 1GB 5450 DDR3 HDMI PCIe"

When I run sensors while running on the previous kernel, it does include th=
e following
section:

radeon-pci-0100
Adapter: PCI adapter
temp1:        +49.5=B0C

so it seems it is trying to read the sensors chip from the display adapter =
card.

Is there something I need to do to get sensors running with the new kernel?
What other information can I get for you?

Thanks,

Excerpt from the vcore-dmesg.txt file after the kernel panics:

     [  284.171817] BUG: unable to handle kernel NULL pointer dereference a=
t 00000000000001d8
     [  284.171896] IP: [<ffffffffa01a1fd2>] radeon_hwmon_show_temp+0x32/0x=
70 [radeon]
     [  284.172009] PGD 0
     [  284.172034] Oops: 0000 [#1] SMP
     [  284.172072] Modules linked in: xt_nat xt_conntrack nf_log_ipv4 nf_l=
og_common xt_LOG iptable_filter nf_nat_ftp iptable_nat=20
nf_nat_ipv4 nf_nat nf_conntrack_irc nf_conntrack_ftp nf_conntrack_ipv4 nf_d=
efrag_ipv4 nf_conntrack ip_tables it87 hwmon_vid=20
eeepc_wmi asus_wmi sparse_keymap rfkill kvm_amd kvm crct10dif_pclmul crc32_=
pclmul crc32c_intel ghash_clmulni_intel aesni_intel lrw=20
gf128mul glue_helper ablk_helper video pcspkr snd_hda_codec_realtek snd_hda=
_codec_generic snd_hda_codec_hdmi snd_hda_intel=20
snd_hda_controller snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm s=
nd_timer snd sp5100_tco cryptd soundcore serio_raw=20
mxm_wmi tpm_infineon k10temp fam15h_power edac_mce_amd edac_core i2c_piix4 =
shpchp wmi acpi_cpufreq xfs libcrc32c sd_mod sr_mod=20
crc_t10dif cdrom crct10dif_common radeon i2c_algo_bit
     [  284.172939]  drm_kms_helper ttm ahci libahci drm libata r8169 i2c_c=
ore mii dm_mirror dm_region_hash dm_log dm_mod
     [  284.173068] CPU: 3 PID: 2579 Comm: sensors Not tainted 3.10.0-229.1=
.2.el7.x86_64 #1
     [  284.173133] Hardware name: To be filled by O.E.M. To be filled by O=
.E.M./M5A97 R2.0, BIOS 2301 01/06/2014
     [  284.173213] task: ffff88022f6038e0 ti: ffff8800b78f8000 task.ti: ff=
ff8800b78f8000
     [  284.173276] RIP: 0010:[<ffffffffa01a1fd2>]  [<ffffffffa01a1fd2>] ra=
deon_hwmon_show_temp+0x32/0x70 [radeon]
     [  284.173398] RSP: 0018:ffff8800b78fbe88  EFLAGS: 00010246
     [  284.173444] RAX: ffff88022f5b4000 RBX: ffff88022ffd1000 RCX: 000000=
0000000000
     [  284.173504] RDX: 0000000000000000 RSI: ffffffffa0277460 RDI: ffff88=
022ee6c400
     [  284.173590] RBP: ffff8800b78fbe90 R08: ffffffff8183c4e0 R09: ffffea=
0008bff480
     [  284.173649] R10: 0000000000003525 R11: 0000000000000246 R12: ffff88=
00b78fbf48
     [  284.173709] R13: 0000000000001000 R14: ffff88022d3fa360 R15: ffff88=
022ee90070
     [  284.173769] FS:  00007f25769fe740(0000) GS:ffff88023ecc0000(0000) k=
nlGS:0000000000000000
     [  284.173840] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
     [  284.173888] CR2: 00000000000001d8 CR3: 00000000b78ac000 CR4: 000000=
00000407e0
     [  284.173948] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 000000=
0000000000
     [  284.174008] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 000000=
0000000400
     [  284.174067] Stack:
     [  284.174087]  ffffffffa0277460 ffff8800b78fbeb0 ffffffff813cec30 fff=
f8800b78fbeb0
     [  284.174165]  ffff88022d3fa380 ffff8800b78fbf00 ffffffff8123d38a fff=
f88022ee6c410
     [  284.174242]  ffffffff8168eaf0 00007f25769fc000 ffff880231424500 000=
07f25769fc000
     [  284.174319] Call Trace:
     [  284.174354]  [<ffffffff813cec30>] dev_attr_show+0x20/0x60
     [  284.174405]  [<ffffffff8123d38a>] sysfs_read_file+0x9a/0x1a0
     [  284.174460]  [<ffffffff811c6acc>] vfs_read+0x9c/0x170
     [  284.174507]  [<ffffffff811c75f8>] SyS_read+0x58/0xb0
     [  284.174555]  [<ffffffff81614a29>] system_call_fastpath+0x16/0x1b
     [  284.174607] Code: 89 e5 53 48 89 d3 e8 7e 0d 23 e1 f6 80 6b 01 00 0=
0 02 48 8b 50 08 74 0a 8b 92 60 05 00 00 85 d2 75 37 48=20
8b 90 e0 16 00 00 31 c9 <48> 8b b2 d8 01 00 00 48 85 f6 74 07 48 89 c7 ff d=
6 89 c1 48 c7
     [  284.175044] RIP  [<ffffffffa01a1fd2>] radeon_hwmon_show_temp+0x32/0=
x70 [radeon]
     [  284.175147]  RSP <ffff8800b78fbe88>
     [  284.175178] CR2: 00000000000001d8

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