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Old 08-14-2016, 06:27 PM   #1
kjhambrick
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Registered: Jul 2005
Location: Round Rock, TX
Distribution: Slackware64 15.0 + Multilib
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Slackware64 14.2 + Multilib + hwinfo = Kernel Oops

All --

Another Post: Has anyone any experience with the new Intel z170 chipset? made me wonder which ChipSet I have in my I7 6700K Laptop.

I installed libx86emu and hwinfo from SBo and took hwinfo for a spin.

I get output from hwinfo ( but not the chipset for my MoBo that I was looking for ).

However, there is a kernel Error in /var/log/syslog ( and dmesg ) each time I run hwinfo ( one example is appended below ).

I've tried hwinfo with huge-4.4.14, huge-4.4.15 and huge-4.4.17 and all produce the same Error.

I googled the error but found nothing useful there ( one hit was here in the Slackware LQ Forum but it was coincidental ).

I was able to eliminate the Error by skipping the code in hwinfo that loads the "st" kernel module but there is something amiss here ( patches for the hwinfo.SlackBuild are attached ).

I posted more-or-less the same patches to the SlackBuild mailing list and copied the maintainer but this is either a hwinfo error or perhaps a kernel error or maybe it's because I am ( still ) running huge kernels ???

Does anyone have any ideas ?

Thanks.

-- kjh
Code:
Aug 14 05:43:35 kjhlt6 kernel: [161792.006542] ------------[ cut here ]------------
Aug 14 05:43:35 kjhlt6 kernel: [161792.006546] WARNING: CPU: 4 PID: 21349 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x62/0x80()
Aug 14 05:43:35 kjhlt6 kernel: [161792.006547] sysfs: cannot create duplicate filename '/class/scsi_tape'
Aug 14 05:43:35 kjhlt6 kernel: [161792.006548] Modules linked in: st(+) lp parport_pc sg rfcomm i2c_dev vmnet(O) ppdev parport vmw_vsock_vmci_transport vsock vmw_vmci vmmon(O) xt_nat xt_limit xt_pkttype xt_tcpudp xt_conntrack nf_log_ipv4 nf_log_common xt_LOG iptable_mangle iptable_nat nf_nat_ipv4 iptable_filter appletalk ax25 ipx p8023 p8022 psnap llc ipv6 nf_conntrack_irc nf_nat_ftp nf_conntrack_ftp nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack ip_tables x_tables cmac bnep fuse snd_hda_codec_realtek snd_hda_codec_generic uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core i915 btusb v4l2_common btrtl videodev joydev mxm_wmi coretemp hwmon intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul crc32c_intel snd_hda_codec_hdmi evdev psmouse serio_raw nvidia_drm(PO) nvidia_modeset(PO) nvidia(PO) ath10k_pci ath10k_core drm_kms_helper ath drm intel_gtt mac80211 i2c_algo_bit agpgart fb_sys_fops snd_hda_intel syscopyarea sysfillrect 
Aug 14 05:43:35 kjhlt6 kernel: [161792.006591] CPU: 4 PID: 21349 Comm: modprobe Tainted: P        W  O    4.4.17 #2
Aug 14 05:43:35 kjhlt6 kernel: [161792.006593] Hardware name: Notebook                         P7xxDM(-G)                      /P7xxDM(-G)                      , BIOS 1.05.03LS1 09/23/2015
Aug 14 05:43:35 kjhlt6 kernel: [161792.006594]  0000000000000000 ffff880f22b67b10 ffffffff8160dda8 ffff880f22b67b58
Aug 14 05:43:35 kjhlt6 kernel: [161792.006596]  ffffffff8215771a ffff880f22b67b48 ffffffff8108d6e2 ffff880ad3cea000
Aug 14 05:43:35 kjhlt6 kernel: [161792.006597]  ffff88107e5c4e40 ffff8810c6115618 ffffffffc0100000 0000000000000001
Aug 14 05:43:35 kjhlt6 kernel: [161792.006599] Call Trace:
Aug 14 05:43:35 kjhlt6 kernel: [161792.006603]  [<ffffffff8160dda8>] dump_stack+0x4d/0x65
Aug 14 05:43:35 kjhlt6 kernel: [161792.006606]  [<ffffffff8108d6e2>] warn_slowpath_common+0x82/0xc0
Aug 14 05:43:35 kjhlt6 kernel: [161792.006608]  [<ffffffffc0100000>] ? 0xffffffffc0100000
Aug 14 05:43:35 kjhlt6 kernel: [161792.006609]  [<ffffffff8108d76c>] warn_slowpath_fmt+0x4c/0x50
Aug 14 05:43:35 kjhlt6 kernel: [161792.006611]  [<ffffffff81238248>] ? kernfs_path+0x48/0x60
Aug 14 05:43:35 kjhlt6 kernel: [161792.006614]  [<ffffffff8123b692>] sysfs_warn_dup+0x62/0x80
Aug 14 05:43:35 kjhlt6 kernel: [161792.006616]  [<ffffffff8123b777>] sysfs_create_dir_ns+0x77/0x90
Aug 14 05:43:35 kjhlt6 kernel: [161792.006619]  [<ffffffff8161022e>] kobject_add_internal+0x9e/0x2d0
Aug 14 05:43:35 kjhlt6 kernel: [161792.006621]  [<ffffffff8161083e>] ? kobject_set_name+0x3e/0x40
Aug 14 05:43:35 kjhlt6 kernel: [161792.006622]  [<ffffffffc0100000>] ? 0xffffffffc0100000
Aug 14 05:43:35 kjhlt6 kernel: [161792.006624]  [<ffffffff816104a6>] kset_register+0x46/0x70
Aug 14 05:43:35 kjhlt6 kernel: [161792.006628]  [<ffffffff817254be>] __class_register+0xce/0x1f0
Aug 14 05:43:35 kjhlt6 kernel: [161792.006629]  [<ffffffffc0100000>] ? 0xffffffffc0100000
Aug 14 05:43:35 kjhlt6 kernel: [161792.006633]  [<ffffffffc0100084>] init_st+0x84/0xfd [st]
Aug 14 05:43:35 kjhlt6 kernel: [161792.006636]  [<ffffffff810003c9>] do_one_initcall+0x99/0x1e0
Aug 14 05:43:35 kjhlt6 kernel: [161792.006639]  [<ffffffff8119d10d>] ? free_vmap_area_noflush+0x3d/0x80
Aug 14 05:43:35 kjhlt6 kernel: [161792.006641]  [<ffffffff811ab5cb>] ? kmem_cache_alloc_trace+0x18b/0x1f0
Aug 14 05:43:35 kjhlt6 kernel: [161792.006645]  [<ffffffff81162aae>] do_init_module+0x5f/0x1c3
Aug 14 05:43:35 kjhlt6 kernel: [161792.006648]  [<ffffffff81107be5>] load_module+0x1c95/0x2270
Aug 14 05:43:35 kjhlt6 kernel: [161792.006650]  [<ffffffff81104a10>] ? __symbol_put+0x50/0x50
Aug 14 05:43:35 kjhlt6 kernel: [161792.006653]  [<ffffffff811c6be1>] ? kernel_read+0x41/0x60
Aug 14 05:43:35 kjhlt6 kernel: [161792.006656]  [<ffffffff8110837f>] SYSC_finit_module+0x8f/0xa0
Aug 14 05:43:35 kjhlt6 kernel: [161792.006659]  [<ffffffff811083ae>] SyS_finit_module+0xe/0x10
Aug 14 05:43:35 kjhlt6 kernel: [161792.006661]  [<ffffffff81c6fd1b>] entry_SYSCALL_64_fastpath+0x16/0x6a
Aug 14 05:43:35 kjhlt6 kernel: [161792.006663] ---[ end trace c6f0df8827b5a76b ]---
Aug 14 05:43:35 kjhlt6 kernel: [161792.006665] ------------[ cut here ]------------
Aug 14 05:43:35 kjhlt6 kernel: [161792.006668] WARNING: CPU: 4 PID: 21349 at lib/kobject.c:240 kobject_add_internal+0x266/0x2d0()
Aug 14 05:43:35 kjhlt6 kernel: [161792.006669] kobject_add_internal failed for scsi_tape with -EEXIST, don't try to register things with the same name in the same directory.
Aug 14 05:43:35 kjhlt6 kernel: [161792.006670] Modules linked in: st(+) lp parport_pc sg rfcomm i2c_dev vmnet(O) ppdev parport vmw_vsock_vmci_transport vsock vmw_vmci vmmon(O) xt_nat xt_limit xt_pkttype xt_tcpudp xt_conntrack nf_log_ipv4 nf_log_common xt_LOG iptable_mangle iptable_nat nf_nat_ipv4 iptable_filter appletalk ax25 ipx p8023 p8022 psnap llc ipv6 nf_conntrack_irc nf_nat_ftp nf_conntrack_ftp nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack ip_tables x_tables cmac bnep fuse snd_hda_codec_realtek snd_hda_codec_generic uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core i915 btusb v4l2_common btrtl videodev joydev mxm_wmi coretemp hwmon intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul crc32c_intel snd_hda_codec_hdmi evdev psmouse serio_raw nvidia_drm(PO) nvidia_modeset(PO) nvidia(PO) ath10k_pci ath10k_core drm_kms_helper ath drm intel_gtt mac80211 i2c_algo_bit agpgart fb_sys_fops snd_hda_intel syscopyarea sysfillrect 
Aug 14 05:43:35 kjhlt6 kernel: [161792.006720] CPU: 4 PID: 21349 Comm: modprobe Tainted: P        W  O    4.4.17 #2
Aug 14 05:43:35 kjhlt6 kernel: [161792.006721] Hardware name: Notebook                         P7xxDM(-G)                      /P7xxDM(-G)                      , BIOS 1.05.03LS1 09/23/2015
Aug 14 05:43:35 kjhlt6 kernel: [161792.006722]  0000000000000000 ffff880f22b67b60 ffffffff8160dda8 ffff880f22b67ba8
Aug 14 05:43:35 kjhlt6 kernel: [161792.006724]  ffffffff82169d08 ffff880f22b67b98 ffffffff8108d6e2 ffff880f22843c18
Aug 14 05:43:35 kjhlt6 kernel: [161792.006725]  00000000ffffffef ffff8810c6038a38 ffffffffc0100000 0000000000000001
Aug 14 05:43:35 kjhlt6 kernel: [161792.006727] Call Trace:
Aug 14 05:43:35 kjhlt6 kernel: [161792.006729]  [<ffffffff8160dda8>] dump_stack+0x4d/0x65
Aug 14 05:43:35 kjhlt6 kernel: [161792.006732]  [<ffffffff8108d6e2>] warn_slowpath_common+0x82/0xc0
Aug 14 05:43:35 kjhlt6 kernel: [161792.006733]  [<ffffffffc0100000>] ? 0xffffffffc0100000
Aug 14 05:43:35 kjhlt6 kernel: [161792.006735]  [<ffffffff8108d76c>] warn_slowpath_fmt+0x4c/0x50
Aug 14 05:43:35 kjhlt6 kernel: [161792.006737]  [<ffffffff8123b69a>] ? sysfs_warn_dup+0x6a/0x80
Aug 14 05:43:35 kjhlt6 kernel: [161792.006738]  [<ffffffff816103f6>] kobject_add_internal+0x266/0x2d0
Aug 14 05:43:35 kjhlt6 kernel: [161792.006740]  [<ffffffff8161083e>] ? kobject_set_name+0x3e/0x40
Aug 14 05:43:35 kjhlt6 kernel: [161792.006741]  [<ffffffffc0100000>] ? 0xffffffffc0100000
Aug 14 05:43:35 kjhlt6 kernel: [161792.006742]  [<ffffffff816104a6>] kset_register+0x46/0x70
Aug 14 05:43:35 kjhlt6 kernel: [161792.006744]  [<ffffffff817254be>] __class_register+0xce/0x1f0
Aug 14 05:43:35 kjhlt6 kernel: [161792.006745]  [<ffffffffc0100000>] ? 0xffffffffc0100000
Aug 14 05:43:35 kjhlt6 kernel: [161792.006747]  [<ffffffffc0100084>] init_st+0x84/0xfd [st]
Aug 14 05:43:35 kjhlt6 kernel: [161792.006749]  [<ffffffff810003c9>] do_one_initcall+0x99/0x1e0
Aug 14 05:43:35 kjhlt6 kernel: [161792.006751]  [<ffffffff8119d10d>] ? free_vmap_area_noflush+0x3d/0x80
Aug 14 05:43:35 kjhlt6 kernel: [161792.006752]  [<ffffffff811ab5cb>] ? kmem_cache_alloc_trace+0x18b/0x1f0
Aug 14 05:43:35 kjhlt6 kernel: [161792.006754]  [<ffffffff81162aae>] do_init_module+0x5f/0x1c3
Aug 14 05:43:35 kjhlt6 kernel: [161792.006756]  [<ffffffff81107be5>] load_module+0x1c95/0x2270
Aug 14 05:43:35 kjhlt6 kernel: [161792.006757]  [<ffffffff81104a10>] ? __symbol_put+0x50/0x50
Aug 14 05:43:35 kjhlt6 kernel: [161792.006759]  [<ffffffff811c6be1>] ? kernel_read+0x41/0x60
Aug 14 05:43:35 kjhlt6 kernel: [161792.006761]  [<ffffffff8110837f>] SYSC_finit_module+0x8f/0xa0
Aug 14 05:43:35 kjhlt6 kernel: [161792.006762]  [<ffffffff811083ae>] SyS_finit_module+0xe/0x10
Aug 14 05:43:35 kjhlt6 kernel: [161792.006764]  [<ffffffff81c6fd1b>] entry_SYSCALL_64_fastpath+0x16/0x6a
Aug 14 05:43:35 kjhlt6 kernel: [161792.006765] ---[ end trace c6f0df8827b5a76c ]---
Aug 14 05:43:35 kjhlt6 kernel: [161792.006766] Unable register sysfs class for SCSI tapes
Attached Files
File Type: txt block.c-module-st-patch.txt (420 Bytes, 10 views)
File Type: txt hwinfo.SlackBuild.patch.txt (539 Bytes, 7 views)
 
Old 08-15-2016, 05:40 AM   #2
kjhambrick
Senior Member
Contributing Member
 
Registered: Jul 2005
Location: Round Rock, TX
Distribution: Slackware64 15.0 + Multilib
Posts: 2,159

Original Poster
Rep: Reputation: 1512Reputation: 1512Reputation: 1512Reputation: 1512Reputation: 1512Reputation: 1512Reputation: 1512Reputation: 1512Reputation: 1512Reputation: 1512Reputation: 1512
All --

After an afternoon of RTFM sessions and messing with hwinfo on my System running the Huge Kernel, I've concluded that there is a bug in the "st" kernel code.

At least it behaves differently than other modules when you run `modprobe` where the module is already loaded or if it is compiled-in as with the Huge Kernel.

The workaround I finally applied to hwinfo involved creating /etc/modprobe.d/disable_scsi_tape.conf ( attached ) and then applying a slight change to the hwinfo source code and patching the hwinfo.SlackBuild to apply the patch.

What I actually changed was the modprobe command in the hwinfo src/hd/block.c source code so that it passes the modprobe -b flag.

See attached files.

Do Not Install /etc/modprobe.d/disable_scsi_tape.conf if you DO have a SCSI Tape Drive !

You can demonstrate the change I made to the hwinfo block.c source with the Huge Kernel where you've got no SCSI Tape Drive like so:

Code:
# NOTE:  do not install disable_scsi_tape.conf if you DO have a SCSI Tape Drive !
#
# Otherwise, install /etc/modprobe.d/disable_scsi_tape.conf as root
#
# save the attached modprobe.d/disable_scsi_tape.conf.txt someplace handy ( /path/to/saved/ below ).

su -              # or sudo to log in as root

man modprobe      # note the -b flag

# install the "st" blacklist file like this:

cp -p /path/to/saved/disable_scsi_tape.conf.txt /etc/modprobe.d/disable_scsi_tape.conf
chown root:root /etc/modprobe.d/disable_scsi_tape.conf
chmod 644       /etc/modprobe.d/disable_scsi_tape.conf

# The "st" Kernel is now blacklisted.  Remember that in case you go Generic and you install a SCSI Tape !

# this command will result in a Kernel Bug Dump in /etc/syslog if you're running Huge

modprobe st                             
       
# this command does NOT result in a Kernel Bug Dump, even if you're running Huge

modprobe -b st
Thanks to all who posted here ( in other threads ) and on the SlackBuilds Mailing List.

I don't really like what I've done. This seems like a Kernel Bug to me but at least hwinfo will work now without making a mess in the syslog.

-- kjh
Attached Files
File Type: txt disable_scsi_tape.conf.txt (358 Bytes, 12 views)
File Type: txt src-block.c-patch-for-st-bug.txt (357 Bytes, 9 views)
File Type: txt hwinfo.SlackBuild.patch.txt (549 Bytes, 8 views)
 
  


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