Bug 824287

Summary:	[REGRESSION] be2iscsi: fix dma free size mismatch
Product:	Red Hat Enterprise Linux 6	Reporter:	Mike Christie <mchristi>
Component:	kernel	Assignee:	Mike Christie <mchristi>
Status:	CLOSED ERRATA	QA Contact:	Bruno Goncalves <bgoncalv>
Severity:	high	Docs Contact:
Priority:	high
Version:	6.3	CC:	bgoncalv, jayamohan.kallickal, jburke, kzhang
Target Milestone:	rc	Keywords:	Regression
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel-2.6.32-277.el6	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2012-06-20 08:43:47 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	829335, 833163

Description Mike Christie 2012-05-23 07:41:41 UTC

Description of problem:

When loading be2iscsi, it will free an incorrect number of bytes resulting in this trace:


-----------[ cut here ]------------
WARNING: at lib/dma-debug.c:811 check_unmap+0x180/0x760() (Not tainted)
Hardware name: Precision WorkStation T5500  
be2iscsi 0000:04:00.2: DMA-API: device driver frees DMA memory with different size [device address=0x0000000032509000] [map size=4 bytes] [unmap size=72 bytes]
Modules linked in: be2iscsi(+) iscsi_boot_sysfs libiscsi scsi_transport_iscsi be2net microcode dcdbas serio_raw i2c_i801 sg iTCO_wdt iTCO_vendor_support tg3 snd_hda_codec_analog snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm snd_timer snd soundcore snd_page_alloc i7core_edac edac_core ext4 mbcache jbd2 sr_mod cdrom sd_mod crc_t10dif firewire_ohci firewire_core crc_itu_t ahci nouveau ttm drm_kms_helper drm i2c_core mxm_wmi video output wmi dm_mirror dm_region_hash dm_log dm_mod [last unloaded: scsi_wait_scan]
Pid: 818, comm: modprobe Not tainted 2.6.32-273.el6.i686.debug #1
Call Trace:
 [<c0459146>] ? warn_slowpath_common+0x76/0xb0
 [<c062ca40>] ? check_unmap+0x180/0x760
 [<c062ca40>] ? check_unmap+0x180/0x760
 [<c04591fe>] ? warn_slowpath_fmt+0x2e/0x30
 [<c062ca40>] ? check_unmap+0x180/0x760
 [<c040fa58>] ? sched_clock+0x8/0x10
 [<c062d072>] ? debug_dma_free_coherent+0x52/0x60
 [<fa818679>] ? mgmt_exec_nonemb_cmd+0x1e9/0x280 [be2iscsi]
 [<c047ba10>] ? autoremove_wake_function+0x0/0x40
 [<fa818af4>] ? mgmt_get_if_info+0x74/0x90 [be2iscsi]
 [<fa80fd16>] ? beiscsi_create_def_ifaces+0x26/0x70 [be2iscsi]
 [<fa81b649>] ? beiscsi_dev_probe+0x12c8/0x13dd [be2iscsi]
 [<c04829cd>] ? cpu_clock+0x6d/0x70
 [<c047ba10>] ? autoremove_wake_function+0x0/0x40
 [<c0866e2d>] ? _spin_unlock+0x1d/0x20
 [<c063642e>] ? local_pci_probe+0xe/0x10
 [<c0637230>] ? pci_device_probe+0x60/0x80
 [<c06e36e7>] ? driver_probe_device+0x87/0x290
 [<c06e3969>] ? __driver_attach+0x79/0x80
 [<c06e2b28>] ? bus_for_each_dev+0x48/0x70
 [<c06e34d9>] ? driver_attach+0x19/0x20
 [<c06e38f0>] ? __driver_attach+0x0/0x80
 [<c06e2edf>] ? bus_add_driver+0x1df/0x2e0
 [<c0637170>] ? pci_device_remove+0x0/0x40
 [<c06e3bf5>] ? driver_register+0x65/0x110
 [<c0625b12>] ? __spin_lock_init+0x32/0x60
 [<c0637464>] ? __pci_register_driver+0x54/0xc0
 [<fa7a105d>] ? beiscsi_module_init+0x5d/0x9d [be2iscsi]
 [<c0481196>] ? up_read+0x16/0x30
 [<c040303d>] ? do_one_initcall+0x2d/0x1d0
 [<fa7a1000>] ? beiscsi_module_init+0x0/0x9d [be2iscsi]
 [<c04a19b3>] ? sys_init_module+0xb3/0x220
 [<c049268c>] ? trace_hardirqs_on_caller+0x12c/0x170
 [<c0620de4>] ? trace_hardirqs_on_thunk+0xc/0x10
 [<c0409d5f>] ? sysenter_do_call+0x12/0x38
---[ end trace a3043032a63015fd ]---
Mapped at:
 [<c062c0da>] debug_dma_alloc_coherent+0x2a/0x80
 [<fa818445>] mgmt_alloc_cmd_data+0xf5/0x140 [be2iscsi]
 [<fa818ace>] mgmt_get_if_info+0x4e/0x90 [be2iscsi]
 [<fa80fd16>] beiscsi_create_def_ifaces+0x26/0x70 [be2iscsi]
 [<fa81b649>] beiscsi_dev_probe+0x12c8/0x13dd [be2iscsi]
be2iscsi 0000:04:00.3: PCI INT D -> GSI 38 (level, low) -> IRQ 38



Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info:

Comment 1 RHEL Program Management 2012-05-23 07:43:35 UTC

This request was evaluated by Red Hat Product Management for inclusion
in a Red Hat Enterprise Linux maintenance release. Product Management has 
requested further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed 
products. This request is not yet committed for inclusion in an Update release.

Comment 5 Jarod Wilson 2012-05-31 15:10:56 UTC

Patch(es) available on kernel-2.6.32-277.el6

Comment 8 Bruno Goncalves 2012-06-04 06:58:21 UTC

Ran regression test on kernel-2.6.32-277.el6

No error has been found.

Also be2iscsi module was loaded and unloaded 1000 times without generating any trace.

Comment 10 errata-xmlrpc 2012-06-20 08:43:47 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2012-0862.html