Red Hat Bugzilla – Bug 234447
BUG_ON(!entry) in shmem_writepage() is triggered in rare circumstances
Last modified: 2010-10-22 10:06:30 EDT
I've checked the patch proposed in attachment #151181 [details] fixes the bug.
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
The fix is incomplete. I was able to trigger slab corruption with it. Upstream
has fixed it with a series of 4 patches from Hugh Dickins ("holepunch: ...", git
commit 90ed52ebe48181d3c5427b3bd1d24f659e7575ad). These seem to work reliably.
This request was evaluated by Red Hat Kernel Team for inclusion in a Red
Hat Enterprise Linux maintenance release, and has moved to bugzilla
You can download this test kernel from http://people.redhat.com/dzickus/el5
I tested 2.6.18-27.el5 and ran the testcase for 6 hours. The bug is fixed.
testcase has run overnight on one of my test systems, no issues so far.
What is the status of this bug? Is an official RHEL5 kernel available? We are
actually seeing this in the wild and would like it to stop.
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 the 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.