Bug 618114
| Summary: | Kernel panic on reading from /proc/bus/pci/XX/YY while hot-removing the device. | |||
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| Product: | Red Hat Enterprise Linux 5 | Reporter: | Wade Mealing <wmealing> | |
| Component: | kernel | Assignee: | Wade Mealing <wmealing> | |
| Status: | CLOSED ERRATA | QA Contact: | Red Hat Kernel QE team <kernel-qe> | |
| Severity: | high | Docs Contact: | ||
| Priority: | urgent | |||
| Version: | 5.5 | CC: | arozansk, cww, dhoward, jarod, moshiro, myamazak, prarit, sforsber, syeghiay, tao, tumeya | |
| Target Milestone: | rc | Keywords: | Reopened, ZStream | |
| Target Release: | --- | |||
| Hardware: | All | |||
| OS: | Linux | |||
| Whiteboard: | ||||
| Fixed In Version: | Doc Type: | Bug Fix | ||
| Doc Text: |
When reading a file from a subdirectory in /proc/bus/pci/ while hot-unplugging the device related to that file, the system will crash. Now, the kernel correctly handles the simultaneous removal of a device and access to the representation of that device in the proc file system.
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Story Points: | --- | |
| Clone Of: | ||||
| : | 670075 675781 (view as bug list) | Environment: | ||
| Last Closed: | 2011-02-07 18:16:43 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: | 670075, 675781, 736725 | |||
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Description
Wade Mealing
2010-07-26 07:18:03 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. Wade, could you please include panic call trace? It's missing in the description. Thanks. in kernel-2.6.18-211.el5 You can download this test kernel from http://people.redhat.com/jwilson/el5 Detailed testing feedback is always welcomed. *** Bug 648378 has been marked as a duplicate of this bug. *** As M Yamazaki stated, this wasn't enough to solve the problem (it did solve my simulated pci hotplug bug) but it requires additional protection from the upstream patch, I'm going to attach the patch, but awaiting feedback from our partners on if its sane and working for them. Looks like there needs to be additional changes, this patch did fix my original problem but there is more.. 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 This bug was part of the RHEL 5.6 kernel advisory and is associated with a patch in 5.6. It has been returned to CLOSED/ERRATA status against 5.6, and will be cloned for handling further issues in RHEL 5.7. Please address additional concerns in that bug and not this one.
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New Contents:
When reading a file from a subdirectory in /proc/bus/pci/ while hot-unplugging the device related to that file, the system will crash. Now, the kernel correctly handles the simultaneous removal of a device and access to the representation of that device in the proc file system.
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