Bug 668976
| Summary: | a test unit ready causes a panic on 5.6 (CCISS driver) [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: | urgent | Docs Contact: | |
| Priority: | urgent | ||
| Version: | 5.6 | CC: | bdonahue, coughlan, dhoward, jpirko, mike.miller, pbenas, pm-eus, rkhan, sandy.garza, steve.cameron, thenzl, yugzhang |
| Target Milestone: | rc | Keywords: | Regression, ZStream |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | kernel-2.6.18-238.2.1.el5 | Doc Type: | Bug Fix |
| Doc Text: |
Using the cciss driver, when a TUR (Test Unit Ready) was executed, the rq->bio pointer in the blk_rq_bytes function was of value null, which resulted in a null pointer dereference, and, consequently, kernel panic occurred. With this update, the rq->bio pointer is used only when the blk_fs_request(rq) condition is true, thus, kernel panic no longer occurs.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-03-01 20:30:35 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: | 664592 | ||
| Bug Blocks: | |||
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Description
RHEL Program Management
2011-01-12 10:12:46 UTC
in kernel-2.6.18-238.2.1.el5 linux-2.6-block-cciss-fix-null-pointer-problem-in-tur-usage.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
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New Contents:
Using the cciss driver, when a TUR (Test Unit Ready) was executed, the rq->bio pointer in the blk_rq_bytes function was of value null, which resulted in a null pointer dereference, and, consequently, kernel panic occurred. With this update, the rq->bio pointer is used only when the blk_fs_request(rq) condition is true, thus, kernel panic no longer occurs.
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