REDHAT-BUG-710338
First published: Fri Jun 03 2011(Updated: )
Andrea Righi reported a case where an exiting task can race against ksmd. ksm_scan.mm_slot == the only registered mm CPU 1 (bug program) CPU 2 (ksmd) list_empty() is false lock ksm_scan.mm_slot list_del unlock slot == &ksm_mm_head (but list is now empty_) Close this race by revalidating that the new slot is not simply the list head again. Reproducer: <a href="http://www.spinics.net/lists/linux-mm/msg20233.html">http://www.spinics.net/lists/linux-mm/msg20233.html</a> Proposed patch: <a href="http://www.spinics.net/lists/linux-mm/msg20301.html">http://www.spinics.net/lists/linux-mm/msg20301.html</a> Acknowledgements: Red Hat would like to thank Andrea Righi for reporting this issue.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Red Hat Linux |
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Reference Links
- http://www.spinics.net/lists/linux-mm/msg20233.html
- http://www.spinics.net/lists/linux-mm/msg20301.html
- https://rhn.redhat.com/errata/RHSA-2011-1189.html
- http://git.kernel.org/linus/2b472611a32a72f4a118c069c2d62a1a3f087afd
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=719238
- https://rhn.redhat.com/errata/RHSA-2011-1253.html
- https://bugzilla.redhat.com/show_bug.cgi?id=710338
Frequently Asked Questions
What is the severity of REDHAT-BUG-710338?
The severity of REDHAT-BUG-710338 is considered to be moderate due to the potential race condition.
How do I fix REDHAT-BUG-710338?
To fix REDHAT-BUG-710338, apply the latest patches provided by Red Hat for your Linux distribution.
Which versions of Red Hat Linux are affected by REDHAT-BUG-710338?
REDHAT-BUG-710338 affects multiple versions of Red Hat Linux, so ensure your version is updated as indicated in the provided advisories.
Is a workaround available for REDHAT-BUG-710338?
No specific workaround is recommended for REDHAT-BUG-710338 beyond updating the system software.
What type of vulnerability is REDHAT-BUG-710338?
REDHAT-BUG-710338 is a race condition vulnerability that occurs with the ksmd process.
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