Bug 670797
| Summary: | panic in kfree() due to race condition in acpi_bus_receive_event() [rhel-5.6.z] | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 5 | Reporter: | RHEL Program Management <pm-rhel> |
| Component: | kernel | Assignee: | Jiri Pirko <jpirko> |
| Status: | CLOSED ERRATA | QA Contact: | Red Hat Kernel QE team <kernel-qe> |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | 5.5 | CC: | anton, chtan, dhoward, jfeeney, jpirko, kzhang, lmcilroy, peterm, pm-eus, rkhan, yugzhang |
| Target Milestone: | rc | Keywords: | ZStream |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | kernel-2.6.18-238.2.1.el5 | Doc Type: | Bug Fix |
| Doc Text: |
Prior to this update, kernel panic occurred in the kfree() due to a race condition in the acpi_bus_receive_event() function. The acpi_bus_receive_event() function left the acpi_bus_event_list list attribute unlocked between checking it whether it was empty and calling the kfree() function on it. With this update, a check was added after the lock has been lifted in order to prevent the race and the calling of the kfree() function on an empty list.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-03-01 20:30:22 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: | 670373 | ||
| Bug Blocks: | |||
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Description
RHEL Program Management
2011-01-19 12:36:54 UTC
in kernel-2.6.18-238.2.1.el5 linux-2.6-acpi-bus-check-if-list-is-empty-before-kfree-ing-it.patch 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-2011-0303.html
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, kernel panic occurred in the kfree() due to a race condition in the acpi_bus_receive_event() function. The acpi_bus_receive_event() function left the acpi_bus_event_list list attribute unlocked between checking it whether it was empty and calling the kfree() function on it. With this update, a check was added after the lock has been lifted in order to prevent the race and the calling of the kfree() function on an empty list.
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