Bug 597334 - reg_regdb_search_lock calls kmalloc while holding spinlock
Summary: reg_regdb_search_lock calls kmalloc while holding spinlock
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel (Show other bugs)
(Show other bugs)
Version: 5.6
Hardware: All Linux
low
medium
Target Milestone: rc
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Assignee: John W. Linville
QA Contact: Red Hat Kernel QE team
URL:
Whiteboard:
Keywords:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-05-28 17:03 UTC by John W. Linville
Modified: 2011-01-13 21:34 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Environment:
Last Closed: 2011-01-13 21:34:57 UTC
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Regression: ---
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---


Attachments (Terms of Use)
jwltest-wireless_-convert-reg_regdb_search_lock_to_mutex.patch (2.16 KB, application/octet-stream)
2010-05-28 17:03 UTC, John W. Linville
no flags Details


External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2011:0017 normal SHIPPED_LIVE Important: Red Hat Enterprise Linux 5.6 kernel security and bug fix update 2011-01-13 10:37:42 UTC

Description John W. Linville 2010-05-28 17:03:27 UTC
Created attachment 417685 [details]
jwltest-wireless_-convert-reg_regdb_search_lock_to_mutex.patch

Stanse discovered that kmalloc is being called with GFP_KERNEL while
holding this spinlock.  The spinlock can be a mutex instead, which also
enables the removal of the unlock/lock around the lock/unlock of
cfg80211_mutex and the call to set_regdom.

Comment 2 RHEL Product and Program Management 2010-05-28 17:21:33 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 4 Jarod Wilson 2010-06-14 18:23:50 UTC
in kernel-2.6.18-203.el5
You can download this test kernel from http://people.redhat.com/jwilson/el5

Detailed testing feedback is always welcomed.

Comment 8 errata-xmlrpc 2011-01-13 21:34:57 UTC
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2011-0017.html


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