Bug 567184 (CVE-2010-1087)

Summary: CVE-2010-1087 kernel: NFS: Fix an Oops when truncating a file
Product: [Other] Security Response Reporter: Eugene Teo (Security Response) <eteo>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: arozansk, bhu, davej, dhoward, jpirko, kmcmartin, lgoncalv, lwang, plyons, pmatouse, rcvalle, tcallawa, williams
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2012-03-28 08:40:36 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: 567193, 567194, 567195, 567196    
Bug Blocks:    

Description Eugene Teo (Security Response) 2010-02-22 05:48:11 UTC 
Description of problem:
The VM/VFS does not allow mapping->a_ops->invalidatepage() to fail. Unfortunately, nfs_wb_page_cancel() may fail if a fatal signal occurs. Since the NFS code assumes that the page stays mapped for as long as the writeback is active, we can end up Oopsing (among other things).

The only safe fix here is to convert nfs_wait_on_request(), so as to make it uninterruptible (as is already the case with wait_on_page_writeback()).

Upstream commit:
http://git.kernel.org/linus/9f557cd8073104b39528794d44e129331ded649f
Comment 2 Eugene Teo (Security Response) 2010-03-03 09:35:41 UTC 
*** Bug 570093 has been marked as a duplicate of this bug. ***
Comment 3 errata-xmlrpc 2010-07-01 18:27:50 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2010:0504 https://rhn.redhat.com/errata/RHSA-2010-0504.html
Comment 4 errata-xmlrpc 2010-08-17 15:52:48 UTC 
This issue has been addressed in following products:

  MRG for RHEL-5

Via RHSA-2010:0631 https://rhn.redhat.com/errata/RHSA-2010-0631.html