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Bug 796850

Summary:	lldpad: DCBX: segfault may occur when clearing advertise bit
Product:	Red Hat Enterprise Linux 6	Reporter:	john.r.fastabend
Component:	lldpad	Assignee:	Petr Šabata <psabata>
Status:	CLOSED ERRATA	QA Contact:	qe-baseos-daemons
Severity:	low	Docs Contact:
Priority:	low
Version:	6.3	CC:	asersen, azelinka, john.r.fastabend, john.ronciak, kavindya.s.deegala, robert.w.love, swadeley
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	lldpad-0.9.43-14.el6	Doc Type:	Bug Fix
Doc Text:	No documentation needed.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2012-06-20 14:14:54 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:

Description john.r.fastabend 2012-02-23 18:49:37 UTC

If the user clears the advertise bit on the APP TLV a segfault may occur due to a bad memcpy. Fix below is available @,

http://www.open-lldp.org/git/?p=lldp/open-lldp.git;a=commit;h=f5ec9455763ad646ed6fa41f5ea2d8f8ccb0c61b

---

author     John Fastabend <john.r.fastabend>
           Wed, 1 Feb 2012 19:11:03 -0800 (19:11 -0800)
committer  John Fastabend <john.r.fastabend>
           Wed, 1 Feb 2012 19:11:03 -0800 (19:11 -0800)
commit     f5ec9455763ad646ed6fa41f5ea2d8f8ccb0c61b

lldpad: DCBX: bad memcpy with APP !advertised

The bld app routines do not verify the application TLV is actually
being advertised before trying to do a memcpy. This can result in
a bad memcpy.

Signed-off-by: John Fastabend <john.r.fastabend>
Tested-by: Ross Brattain <ross.b.brattain>

Comment 3 Robert Love 2012-02-24 23:41:39 UTC

Intel observed this defect in RHEL6.2. We're a bit unclear as to whether this meets the 6.2 errata critera to get this patch backported. It's certainly a bad problem (segfault), but it's user space. At this point I just wanted to make RH aware that the failure exists in RHEL6.2.

Comment 5 Petr Šabata 2012-02-29 14:40:20 UTC

Pushed as lldpad-0.9.43-14.el6.

Comment 8 kavindya.s.deegala 2012-04-04 23:53:23 UTC

Verification failed with Red Hat 6.3 Alpha

Comment 9 kavindya.s.deegala 2012-04-10 22:13:40 UTC

Please ignore Comment 8. 

Verification passed with Red hat 6.3 Alpha.

Comment 10 Stephen Wadeley 2012-06-08 14:04:17 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:
No documentation needed.

Comment 11 errata-xmlrpc 2012-06-20 14:14:54 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2012-0901.html