Bug 598355 - [5.5] SCTP: Check if the file structure is valid before checking the non-blocking flag [rhel-5.5.z]
Summary: [5.5] SCTP: Check if the file structure is valid before checking the non-bloc...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel
Version: 5.5
Hardware: All
OS: Linux
urgent
urgent
Target Milestone: rc
: ---
Assignee: Jiri Pirko
QA Contact: Red Hat Kernel QE team
URL:
Whiteboard:
Depends On: 578261
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-06-01 07:41 UTC by RHEL Program Management
Modified: 2015-05-05 01:20 UTC (History)
11 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
When the Stream Control Transmission Protocol (SCTP) kernel code attempted to check a non-blocking flag, it could have dereferenced a NULL file pointer due to the fact that in-kernel sockets created with the sock_create_kern() function may not have a file structure and descriptor allocated to them. The kernel would crash as a result of the dereference. With this update, SCTP ensures that the file is valid before attempting to set a timeout, thus preventing a possible NULL dereference and consequent kernel crash.
Clone Of:
Environment:
Last Closed: 2010-07-01 18:28:35 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2010:0504 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2010-07-01 18:26:58 UTC

Description RHEL Program Management 2010-06-01 07:41:53 UTC 
This bug has been copied from bug #578261 and has been proposed
to be backported to 5.5 z-stream (EUS).
Comment 3 Jiri Pirko 2010-06-07 13:31:02 UTC 
in 2.6.18-194.6.1.el5
Comment 7 Douglas Silas 2010-06-28 20:28:31 UTC 
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:
When the Stream Control Transmission Protocol (SCTP) kernel code attempted to check a non-blocking flag, it could have dereferenced a NULL file pointer due to the fact that in-kernel sockets created with the sock_create_kern() function may not have a file structure and descriptor allocated to them. The kernel would crash as a result of the dereference. With this update, SCTP ensures that the file is valid before attempting to set a timeout, thus preventing a possible NULL dereference and consequent kernel crash.
Comment 9 errata-xmlrpc 2010-07-01 18:28:35 UTC 
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-2010-0504.html
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