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Bug 1426661 - BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:915
Summary: BUG: sleeping function called from invalid context at kernel/locking/rtmutex....
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: kernel-rt
Version: 7.4
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: rc
: ---
Assignee: John Kacur
QA Contact: Jiri Kastner
URL:
Whiteboard:
Depends On:
Blocks: 1353018 1410158
TreeView+ depends on / blocked
 
Reported: 2017-02-24 14:44 UTC by John Kacur
Modified: 2017-08-02 00:24 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2017-08-01 19:00:29 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
slub: Disable SLUB_CPU_PARTIAL (2.11 KB, patch)
2017-03-13 17:43 UTC, John Kacur 		no flags Details | Diff
slub: Disable SLUB_CPU_PARTIAL (2.12 KB, patch)
2017-03-13 17:58 UTC, John Kacur 		no flags Details | Diff
Show Obsolete (1) View All


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:2077 0 normal SHIPPED_LIVE Important: kernel-rt security, bug fix, and enhancement update 2017-08-01 18:13:37 UTC

Description John Kacur 2017-02-24 14:44:20 UTC 
BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:915
|in_atomic(): 1, irqs_disabled(): 0, pid: 87, name: rcuop/7
|1 lock held by rcuop/7/87:
| #0:  (rcu_callback){......}, at: [<ffffffff8112c76a>] rcu_nocb_kthread+0x1ca/0x5d0
|Preemption disabled at:[<ffffffff811eebd9>] put_cpu_partial+0x29/0x220
|
|CPU: 0 PID: 87 Comm: rcuop/7 Tainted: G        W       4.0.0-rt0+ #477
|Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
| 000000000007a9fc ffff88013987baf8 ffffffff817441c7 0000000000000007
| 0000000000000000 ffff88013987bb18 ffffffff810eee51 0000000000000000
| ffff88013fc10200 ffff88013987bb48 ffffffff8174a1c4 000000000007a9fc
|Call Trace:
| [<ffffffff817441c7>] dump_stack+0x4f/0x90
| [<ffffffff810eee51>] ___might_sleep+0x121/0x1b0
| [<ffffffff8174a1c4>] rt_spin_lock+0x24/0x60
| [<ffffffff811a689a>] __free_pages_ok+0xaa/0x540
| [<ffffffff811a729d>] __free_pages+0x1d/0x30
| [<ffffffff811eddd5>] __free_slab+0xc5/0x1e0
| [<ffffffff811edf46>] free_delayed+0x56/0x70
| [<ffffffff811eecfd>] put_cpu_partial+0x14d/0x220
| [<ffffffff811efc98>] __slab_free+0x158/0x2c0
| [<ffffffff811f0021>] kmem_cache_free+0x221/0x2d0
| [<ffffffff81204d0c>] file_free_rcu+0x2c/0x40
| [<ffffffff8112c7e3>] rcu_nocb_kthread+0x243/0x5d0
| [<ffffffff810e951c>] kthread+0xfc/0x120
| [<ffffffff8174abc8>] ret_from_fork+0x58/0x90
Comment 2 John Kacur 2017-02-24 14:46:49 UTC 
Verify bug exists

fix is in init/Kconfig

 config SLUB_CPU_PARTIAL
 	default y
-	depends on SLUB && SMP
+	depends on SLUB && SMP && !PREEMPT_RT_FULL

but in our version we only have depends on SLUB
Comment 3 John Kacur 2017-03-13 17:43:34 UTC 
Created attachment 1262528 [details]
slub: Disable SLUB_CPU_PARTIAL
Comment 5 John Kacur 2017-03-13 17:58:40 UTC 
Created attachment 1262536 [details]
slub: Disable SLUB_CPU_PARTIAL
Comment 6 John Kacur 2017-04-21 00:42:04 UTC 
Fixed with 0d843ade75c55b17cc484224ef370bda62df1059
Comment 9 errata-xmlrpc 2017-08-01 19:00:29 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.

https://access.redhat.com/errata/RHSA-2017:2077
Comment 10 errata-xmlrpc 2017-08-02 00:24:28 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.

https://access.redhat.com/errata/RHSA-2017:2077
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