|Summary:||clvmd hangs/crash if invalid local request sent|
|Product:||Red Hat Enterprise Linux 6||Reporter:||Roman <rommer>|
|Component:||lvm2||Assignee:||Milan Broz <mbroz>|
|Status:||CLOSED ERRATA||QA Contact:||Corey Marthaler <cmarthal>|
|Version:||6.1||CC:||agk, dwysocha, heinzm, jbrassow, mbroz, prajnoha, prockai, pvrabec, thornber, zkabelac|
|Fixed In Version:||lvm2-2.02.95-1.el6||Doc Type:||Bug Fix|
Previously, if clvmd received invalid request through its socket (for example an incomplete header sent), clvmd process could crash or stay in infinite loop. Additional checks were added so such invalid packet now causes proper error reply to client and clvmd no longer crashes.
|Last Closed:||2012-06-20 14:59:53 UTC||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
|Cloudforms Team:||---||Target Upstream Version:|
|Bug Depends On:|
Description Roman 2011-09-14 23:20:47 UTC
Description of problem: clvmd hangs or crash if invalid request sent via /var/run/lvm/clvmd.sock Version-Release number of selected component (if applicable): lvm2-cluster-2.02.83-3.el6.x86_64 How reproducible: always Steps to Reproduce: 1. start clvmd 2. run perl -e 'print "\xff"x32' | socat STDIN UNIX-CONNECT:/var/run/lvm/clvmd.sock Actual results: clvmd crash or hangs and eat 100% of CPU Expected results: no hang or crash occurs Additional info: invalid request may send lvm in case of memory pressure or similar problem. attached patch solved problem for me.
Comment 3 Milan Broz 2011-09-15 11:32:41 UTC
Yes, this seem to be reasonable fix, thanks.
Comment 4 Milan Broz 2011-09-16 14:41:29 UTC
Slightly modified patch committed upstream, thanks.
Comment 10 Milan Broz 2012-04-24 18:18:45 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: Previously, if clvmd received invalid request through its socket (for example an incomplete header sent), clvmd process could crash or stay in infinite loop. Additional checks were added so such invalid packet now causes proper error reply to client and clvmd no longer crashes.
Comment 11 Corey Marthaler 2012-04-26 21:52:47 UTC
Marking verified (SanityOnly).
Comment 13 errata-xmlrpc 2012-06-20 14:59:53 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-2012-0962.html