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Bug 131569

Summary:	__might_sleep() bug on removal of device in bridge.
Product:	Red Hat Enterprise Linux 4	Reporter:	David Woodhouse <dwmw2>
Component:	kernel	Assignee:	Dave Jones <davej>
Status:	CLOSED RAWHIDE	QA Contact:	Brian Brock <bbrock>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	4.0	CC:	jturner, pfrields, wtogami
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2005-01-14 10:02:57 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 David Woodhouse 2004-09-02 12:47:51 UTC

2.6.8-1.521 i686 UP

Debug: sleeping function called from invalid context at
include/asm/semaphore.h:119
in_atomic():1[expected: 0], irqs_disabled():0
 [<0211b765>] __might_sleep+0x82/0x8c
 [<021a5eea>] sysfs_hash_and_remove+0x1c/0x1ce
 [<129a4f32>] br_sysfs_removeif+0x18/0x20 [bridge]
 [<129a1908>] br_del_if+0x23/0x10b [bridge]
 [<129a2b27>] br_device_event+0x11f/0x17c [bridge]
 [<0212ccf5>] notifier_call_chain+0x17/0x30
 [<022a0550>] unregister_netdevice+0x178/0x2e9
 [<0223a872>] unregister_netdev+0xf/0x15
 [<129acad3>] bnep_session+0x697/0x6d2 [bnep]
 [<0211a8ee>] default_wake_function+0x0/0xc
 [<129ac43c>] bnep_session+0x0/0x6d2 [bnep]
 [<021041d9>] kernel_thread_helper+0x5/0xb

Comment 1 David Woodhouse 2004-09-06 10:02:43 UTC

bad: scheduling while atomic!
 [<022f3d9d>] schedule+0x2d/0x5a0
 [<0210659e>] dump_stack+0x11/0x13
 [<0211b765>] __might_sleep+0x82/0x8c
 [<021a5ef5>] sysfs_hash_and_remove+0x27/0x1ce
 [<129a4f32>] br_sysfs_removeif+0x18/0x20 [bridge]
 [<129a1908>] br_del_if+0x23/0x10b [bridge]
 [<129a2b27>] br_device_event+0x11f/0x17c [bridge]
 [<0212ccf5>] notifier_call_chain+0x17/0x30
 [<022a0550>] unregister_netdevice+0x178/0x2e9
 [<0223a872>] unregister_netdev+0xf/0x15
 [<129acad3>] bnep_session+0x697/0x6d2 [bnep]
 [<0211a8ee>] default_wake_function+0x0/0xc
 [<129ac43c>] bnep_session+0x0/0x6d2 [bnep]
 [<021041d9>] kernel_thread_helper+0x5/0xb
device bnep0 left promiscuous mode
net/bridge/br_if.c:105: spin_lock(net/bridge/br_if.c:0f020280) already
locked by net/bridge/br_notify.c/44
pan0: port 1(bnep0) entering disabled state
net/bridge/br_notify.c:82: spin_unlock(net/bridge/br_if.c:0f020280)
not locked
divert: freeing divert_blk for bnep0

Comment 2 David Woodhouse 2004-09-07 09:22:33 UTC

Fix at http://oss.sgi.com/projects/netdev/archive/2004-09/msg00144.html

Comment 3 Arjan van de Ven 2004-09-29 14:54:47 UTC

still relevant?

Comment 4 Dave Jones 2004-11-27 21:54:18 UTC

repeatable in b2 ? (or later?)

Comment 5 Dave Jones 2004-11-27 21:55:38 UTC

eyeballing the code shows that patch got integrated in b2. moving to modified

Comment 6 Jay Turner 2005-01-14 10:02:57 UTC

Closing this out since the patch has been in for some time and no negative
feedback.  Please reopen if there's still an issue with the latest code.