Bug 1096786

Summary: WARNING: CPU: 0 PID: 4692 at fs/sysfs/group.c:216 sysfs_remove_group+0x93/0xa0()
Product: [Fedora] Fedora Reporter: poma <pomidorabelisima>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED CURRENTRELEASE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: urgent Docs Contact:
Priority: unspecified    
Version: 20CC: gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda, mchehab
Target Milestone: ---Keywords: Reopened
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2014-05-17 13:16:47 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:
Attachments:
Description Flags
dmesg-3.14.3-200.fc20.x86_64 sysfs_remove_group
none
SCSI-fix-our-current-target-reap-infrastructure-v2 patch
none
dmesg 3.14.4-200.fc20.x86_64 with SCSI-fix-our-current-target-reap-infrastructure-v2 patch none

Description poma 2014-05-12 12:27:16 UTC 
Unplug the device without unmounting, 
...
usb 2-1: USB disconnect, device number 2
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4692 at fs/sysfs/group.c:216 sysfs_remove_group+0x93/0xa0()
sysfs group ffffffff81cb1300 not found for kobject 'target8:0:0'
CPU: 0 PID: 4692 Comm: umount Not tainted 3.14.3-200.fc20.x86_64 #1
Call Trace:
 [<ffffffff816ef242>] dump_stack+0x45/0x56
 [<ffffffff8108a1bd>] warn_slowpath_common+0x7d/0xa0
 [<ffffffff8108a23c>] warn_slowpath_fmt+0x5c/0x80
 [<ffffffff81265598>] ? kernfs_find_and_get_ns+0x48/0x60
 [<ffffffff81264233>] sysfs_remove_group+0x93/0xa0
 [<ffffffff8146b543>] dpm_sysfs_remove+0x43/0x50
 [<ffffffff81460b35>] device_del+0x45/0x1c0
 [<ffffffff8148deb7>] scsi_target_reap_usercontext+0x27/0x40
 [<ffffffff810a4e67>] execute_in_process_context+0x67/0x70
 [<ffffffff8148f334>] scsi_target_reap+0xc4/0xf0
 [<ffffffff81491366>] scsi_device_dev_release_usercontext+0xe6/0x120
 [<ffffffff810a4e67>] execute_in_process_context+0x67/0x70
 [<ffffffff8149127c>] scsi_device_dev_release+0x1c/0x20
 [<ffffffff814600e2>] device_release+0x32/0xa0
 [<ffffffff813560a7>] kobject_cleanup+0x77/0x1b0
 [<ffffffff81355f60>] kobject_put+0x30/0x60
 [<ffffffff81460407>] put_device+0x17/0x20
 [<ffffffff8148268b>] scsi_device_put+0x3b/0x50
 [<ffffffff81495e50>] scsi_disk_put+0x30/0x50
 [<ffffffff814961b2>] sd_release+0x42/0xd0
 [<ffffffff8122489c>] __blkdev_put+0x16c/0x1a0
 [<ffffffff8122483e>] __blkdev_put+0x10e/0x1a0
 [<ffffffff8122521c>] blkdev_put+0x4c/0x120
 [<ffffffff811ebd64>] kill_block_super+0x44/0x70
 [<ffffffff811ec06d>] deactivate_locked_super+0x3d/0x60
 [<ffffffff811ec636>] deactivate_super+0x46/0x60
 [<ffffffff81208dac>] mntput_no_expire+0xac/0x140
 [<ffffffff8120a37d>] SyS_umount+0x9d/0x110
 [<ffffffff816ff5e9>] system_call_fastpath+0x16/0x1b
---[ end trace 6a4cda17930756e9 ]---
Comment 1 poma 2014-05-12 12:30:32 UTC 
Created attachment 894673 [details]
dmesg-3.14.3-200.fc20.x86_64 sysfs_remove_group
Comment 2 poma 2014-05-12 15:14:10 UTC 

*** This bug has been marked as a duplicate of bug 1030988 ***
Comment 3 poma 2014-05-14 11:44:49 UTC 
Created attachment 895462 [details]
SCSI-fix-our-current-target-reap-infrastructure-v2 patch


Ref.
[SCSI] fix our current target reap infrastructure
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/?id=e63ed0d
Comment 4 poma 2014-05-14 11:45:51 UTC 
Created attachment 895463 [details]
dmesg 3.14.4-200.fc20.x86_64 with SCSI-fix-our-current-target-reap-infrastructure-v2 patch
Comment 5 poma 2014-05-17 13:16:47 UTC 
If at all it reaches 3.14, there will be with 3.15.
And already there is one br open for all branches, so you can set this one as a duplicate.
OK.
Comment 6 poma 2014-06-04 22:31:26 UTC 
3.14.5-200.fc20.x86_64 PASIS