Bug 664931
Summary: | COW corruption using popen(3). | ||||||||
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Product: | Red Hat Enterprise Linux 5 | Reporter: | Wade Mealing <wmealing> | ||||||
Component: | kernel | Assignee: | Larry Woodman <lwoodman> | ||||||
Status: | CLOSED ERRATA | QA Contact: | Zhouping Liu <zliu> | ||||||
Severity: | medium | Docs Contact: | |||||||
Priority: | low | ||||||||
Version: | 5.6 | CC: | chyang, coughlan, dhoward, jburke, jthomas, jwest, nobody+295318, pbenas, qcai, syeghiay | ||||||
Target Milestone: | rc | Keywords: | ZStream | ||||||
Target Release: | --- | ||||||||
Hardware: | Unspecified | ||||||||
OS: | Unspecified | ||||||||
Whiteboard: | |||||||||
Fixed In Version: | Doc Type: | Bug Fix | |||||||
Doc Text: |
Prior to this update, a multi-threaded application, which invoked popen(3) internally, could cause a thread stall by FILE lock corruption. The application program waited for a FILE lock in glibc, but the lock seemed to be corrupted, which was caused by a race condition in the COW (Copy On Write) logic. With this update, the race condition was corrected and FILE lock corruption no longer occurs.
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Story Points: | --- | ||||||
Clone Of: | Environment: | ||||||||
Last Closed: | 2011-07-21 10:27:19 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: | |||||||||
Bug Depends On: | |||||||||
Bug Blocks: | 667050 | ||||||||
Attachments: |
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Description
Wade Mealing
2010-12-22 06:53:59 UTC
Created attachment 470135 [details]
Reproducing example.
Created attachment 470242 [details] backport to 2_6_18-238 Backport of http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=945754a1754f9d4c2974a8241ad4f92fad7f3a6a Posted upstream backport for RHEL5 to rhkernel-list Larry Woodman 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. in kernel-2.6.18-241.el5 You can download this test kernel (or newer) from http://people.redhat.com/jwilson/el5 Detailed testing feedback is always welcomed. Technical note added. If any revisions are required, please edit the "Technical Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. New Contents: Prior to this update, a multi-threaded application, which invoked popen(3) internally, could cause a thread stall by FILE lock corruption. The application program waited for a FILE lock in glibc, but the lock seemed to be corrupted, which was caused by a race condition in the COW (Copy On Write) logic. With this update, the race condition was corrected and FILE lock corruption no longer occurs. 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-2011-1065.html |