Bug 218687

Summary:	Erratic SCSI tape problem - kernel BUG at mm/slab.c:594
Product:	[Fedora] Fedora	Reporter:	Dylan Martin <dmartin>
Component:	kernel	Assignee:	Kernel Maintainer List <kernel-maint>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Brian Brock <bbrock>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	5	CC:	triage, wtogami
Target Milestone:	---
Target Release:	---
Hardware:	i386
OS:	Linux
Whiteboard:	bzcl34nup
Fixed In Version:	kernel 2.6.21	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2008-04-04 15:49:59 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Dylan Martin 2006-12-06 20:18:20 UTC

From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.8) Gecko/20061108 Fedora/1.5.0.8-1.fc5 Firefox/1.5.0.8

Description of problem:
Tape drive becomes unusable after 5-10 minutes of playing with it.  I found the 
"kernel BUG at mm/slab.c:594!" error below.  I think this bug is affecting more than tapes or scsi, as other people with other devices have mentioned 
"kernel BUG at mm/slab.c:594!"  I'll include references below.

This just started with the latest FC5 kernel (2.6.18-1.2239.fc5).  Several Megariad machines I have also will not boot with the new kernel, but that might not be related.

References:
http://lkml.org/lkml/2006/11/12/63
http://www.mail-archive.com/bcm43xx-dev@lists.berlios.de/msg02470.html
http://www.spinics.net/lists/linux-scsi/msg12907.html
http://www.spinics.net/lists/linux-scsi/msg12783.html
   	  	  
Bug #217488 mentions a similer error message, but with a USB connection to a phone.     	    	  	    	  

------------[ cut here ]------------
invalid opcode: 0000 [#2]
last sysfs file: /devices/pci0000:03/0000:03:08.1/host1/target1:0:6/1:0:6:0/vend
or
Modules linked in: ipv6 vmnet(U) vmmon(U) video sbs i2c_ec container button batt
ery asus_acpi ac lp parport_pc parport ohci_hcd floppy st sg serio_raw i2c_piix4
 i2c_core cfi_probe gen_probe scb2_flash mtdcore e1000 chipreg map_funcs pcspkr 
ide_cd cdrom dm_snapshot dm_zero dm_mirror dm_mod ext3 jbd aacraid aic7xxx scsi_
transport_spi sd_mod scsi_mod
CPU:    0
EIP:    0060:[<c045d3ac>]    Tainted: P      VLI
EFLAGS: 00010206   (2.6.18-1.2239.fc5 #1) 
EIP is at kmem_cache_free+0x29/0x62
eax: c001086c   ebx: f7ffe860   ecx: f7ff5620   edx: c1800000
esi: f7ffcf40   edi: 00000000   ebp: f21e0124   esp: c8383e28
ds: 007b   es: 007b   ss: 0068
Process tar (pid: 1219, ti=c8383000 task=f3cde290 task.ti=c8383000)
Stack: f7ffe860 f7ffcf40 00000000 c0448c0e 00000000 def70620 f7ffcf40 def70620 
       c04653e6 00000800 00000000 c046510c f8843f74 00000800 00000000 00000006 
       c8383f5c da387660 00000800 00000000 00000002 c1065620 00002000 00000000 
Call Trace:
 [<c0448c0e>] mempool_free+0x61/0x66
 [<c04653e6>] bio_free+0x25/0x30
 [<c046510c>] bio_put+0x27/0x28
 [<f8843f74>] scsi_execute_async+0x15a/0x32d [scsi_mod]
 [<f8952c57>] st_do_scsi+0x1d1/0x221 [st]
 [<f89565d8>] st_read+0x2ed/0x7a6 [st]
 [<c04613d8>] vfs_read+0xa6/0x157
 [<c0461760>] sys_read+0x41/0x67
 [<c0402d9b>] syscall_call+0x7/0xb
DWARF2 unwinder stuck at syscall_call+0x7/0xb
Leftover inexact backtrace:
 =======================
Code: 5f c3 57 89 d7 8d 92 00 00 00 40 89 c1 c1 ea 0c c1 e2 05 03 15 70 53 79 c0
 56 53 8b 02 f6 c4 40 74 03 8b 52 0c 8b 02 84 c0 78 08 <0f> 0b 52 02 e3 f8 61 c0
 39 4a 18 74 08 0f 0b 99 0d e3 f8 61 c0 
EIP: [<c045d3ac>] kmem_cache_free+0x29/0x62 SS:ESP 0068:c8383e28


Version-Release number of selected component (if applicable):
 2.6.18-1.2239.fc5

How reproducible:
Sometimes


Steps to Reproduce:
1) Be one of the few people affected by this bug .. 
2) have (in my case) a LTO1 tape drive attached to Adaptec AHA-3960D / AIC-7899A U160/m (rev 01) scsi card on a Dell server (unsure which one at this time)
2) Boot to kernel 2.6.18-1.2239.fc5Adaptec AHA-3960D / AIC-7899A U160/m (rev 01)
3) play with tape drive (mt stat; tar blah blah; mt stat; etc..) for 5-10 minutes

Actual Results:
Kernel error above prints to screen and tape stops responding

Expected Results:
Normal tape operation

Additional info:

Comment 1 Bug Zapper 2008-04-04 05:07:14 UTC

Fedora apologizes that these issues have not been resolved yet. We're
sorry it's taken so long for your bug to be properly triaged and acted
on. We appreciate the time you took to report this issue and want to
make sure no important bugs slip through the cracks.

If you're currently running a version of Fedora Core between 1 and 6,
please note that Fedora no longer maintains these releases. We strongly
encourage you to upgrade to a current Fedora release. In order to
refocus our efforts as a project we are flagging all of the open bugs
for releases which are no longer maintained and closing them.
http://fedoraproject.org/wiki/LifeCycle/EOL

If this bug is still open against Fedora Core 1 through 6, thirty days
from now, it will be closed 'WONTFIX'. If you can reporduce this bug in
the latest Fedora version, please change to the respective version. If
you are unable to do this, please add a comment to this bug requesting
the change.

Thanks for your help, and we apologize again that we haven't handled
these issues to this point.

The process we are following is outlined here:
http://fedoraproject.org/wiki/BugZappers/F9CleanUp

We will be following the process here:
http://fedoraproject.org/wiki/BugZappers/HouseKeeping to ensure this
doesn't happen again.

And if you'd like to join the bug triage team to help make things
better, check out http://fedoraproject.org/wiki/BugZappers

Comment 2 Dylan Martin 2008-04-04 15:52:35 UTC

Fixed in upstream kernel 2.6.21.  Sorry I didn't close this bug at that time. 
Thanks.