https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 https://jira.whamcloud.com/browse/LU-1092 Lustre <p>We had three occurrences of this crash on our classified 2.1 Lustre cluster, all on OSS nodes.</p> <p>BUG: unable to handle kernel NULL pointer dereference at 0000000000000038<br/> IP: <span class="error">&#91;&lt;ffffffffa0a8e061&gt;&#93;</span> filter_export_stats_init+0x1f1/0x500 <span class="error">&#91;obdfilter&#93;</span></p> <p>machine_kexec<br/> crash_kexec<br/> oops_end<br/> no_context<br/> __bad_area_nosemaphore<br/> bad_area_nosemaphore<br/> __do_page_fault<br/> do_page_fault<br/> page_fault<br/> <span class="error">&#91;exception RIP: filter_export_stats_init+497&#93;</span><br/> filter_reconnect<br/> target_handle_connect<br/> ost_handle<br/> ptlrpc_main<br/> kernel_thread</p> <p>The timeframe conincided with the ASSERT reported in <a href="https://jira.whamcloud.com/browse/LU-1085" title="ASSERTION(cfs_atomic_read(&amp;exp-&gt;exp_refcount) == 0) failed" class="issue-link" data-issue-key="LU-1085"><del>LU-1085</del></a>. As in the other bugs we hit during that window, this crash was preceded by hundreds of messages like this:</p> <p>LustreError: 14210:0:(genops.c:1270:class_disconnect_stale_exports()) ls5-OST0349: disconnect stale client <span class="error">&#91;UUID&#93;</span>@&lt;unknown&gt;</p> <p>Oleg has suggested that the patch for <a href="https://jira.whamcloud.com/browse/LU-106" title="unable to handle kernel paging request in lprocfs_stats_collect()" class="issue-link" data-issue-key="LU-106"><del>LU-106</del></a> may help here, and we have pulled it into our branch but haven't pushed it out yet.</p> <a href="https://github.com/chaos/lustre/commits/2.1.0-llnl">https://github.com/chaos/lustre/commits/2.1.0-llnl</a><br/> RHEL 6.2 LU-1092

NULL pointer dereference in filter_export_stats_init()

Bug Critical Resolved Fixed Lai Siyao Ned Bass paj Fri, 10 Feb 2012 17:39:46 +0000 Tue, 12 Jun 2012 00:35:29 +0000 Thu, 29 Mar 2012 08:51:37 +0000 Lustre 2.1.0 Lustre 2.3.0 Lustre 2.1.2 0 4 <p>Lai</p> <p>Does this look like it would be related to <a href="https://jira.whamcloud.com/browse/LU-106" title="unable to handle kernel paging request in lprocfs_stats_collect()" class="issue-link" data-issue-key="LU-106"><del>LU-106</del></a>?</p> <p>Peter</p> <p>I don't think so since we just suffered this same crash/Oops with our Lustre version already including <a href="https://jira.whamcloud.com/browse/LU-106" title="unable to handle kernel paging request in lprocfs_stats_collect()" class="issue-link" data-issue-key="LU-106"><del>LU-106</del></a> patch !!... :<br/> ======================================<br/> crash&gt; sys<br/> SYSTEM MAP: /boot/System.map-2.6.32-131.17.1.bl6.Bull.27.0.x86_64<br/> DEBUG KERNEL:<br/> /usr/lib/debug/lib/modules/2.6.32-131.17.1.bl6.Bull.27.0.x86_64/vmlinux<br/> (2.6.32-131.17.1.bl6.Bull.27.0.x86_64)<br/> DUMPFILE: ./vmcore <span class="error">&#91;PARTIAL DUMP&#93;</span><br/> CPUS: 32<br/> DATE: Wed Feb 29 16:06:48 2012<br/> UPTIME: 01:24:59<br/> LOAD AVERAGE: 16.72, 15.79, 14.23<br/> TASKS: 1855<br/> NODENAME: curie228<br/> RELEASE: 2.6.32-131.17.1.bl6.Bull.27.0.x86_64<br/> VERSION: <a href="https://bugtracker.ccc.cea.fr/view.php?id=1" class="external-link" target="_blank" rel="nofollow noopener">https://bugtracker.ccc.cea.fr/view.php?id=1</a> SMP Mon Nov 7<br/> 15:21:24 CET 2011<br/> MACHINE: x86_64 (2266 Mhz)<br/> MEMORY: 64 GB<br/> PANIC: "Oops: 0002 <a href="#1" target="_blank" rel="noopener">1</a> SMP "<br/> (check log for details)<br/> crash&gt;<br/> crash&gt; bt<br/> PID: 26089 TASK: ffff880bd9164080 CPU: 7 COMMAND: "ll_ost_116"<br/> #0 <span class="error">&#91;ffff880bc823b540&#93;</span> machine_kexec at ffffffff81027a4b<br/> #1 <span class="error">&#91;ffff880bc823b5a0&#93;</span> crash_kexec at ffffffff810a2db2<br/> #2 <span class="error">&#91;ffff880bc823b670&#93;</span> oops_end at ffffffff81481730<br/> #3 <span class="error">&#91;ffff880bc823b6a0&#93;</span> no_context at ffffffff81031d1b<br/> #4 <span class="error">&#91;ffff880bc823b6f0&#93;</span> __bad_area_nosemaphore at ffffffff81031fa5<br/> #5 <span class="error">&#91;ffff880bc823b740&#93;</span> bad_area_nosemaphore at ffffffff81032073<br/> #6 <span class="error">&#91;ffff880bc823b750&#93;</span> __do_page_fault at ffffffff810326fd<br/> #7 <span class="error">&#91;ffff880bc823b870&#93;</span> do_page_fault at ffffffff8148373e<br/> #8 <span class="error">&#91;ffff880bc823b8a0&#93;</span> page_fault at ffffffff81480ac5<br/> <span class="error">&#91;exception RIP: filter_export_stats_init+665&#93;</span><br/> RIP: ffffffffa0900e49 RSP: ffff880bc823b950 RFLAGS: 00010286<br/> RAX: ffff880fae2ddc60 RBX: 0000000000000000 RCX: 0000000000000000<br/> RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8807e5ab1c00<br/> RBP: ffff880bc823b9c0 R8: 0000000000000000 R9: ffff880f895bc000<br/> R10: 0000000000000001 R11: dead000000200200 R12: ffff88040b14e340<br/> R13: ffff880faf6795f0 R14: ffff880c136ee2f8 R15: ffff880faf6795f0<br/> ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018<br/> #9 <span class="error">&#91;ffff880bc823b9c8&#93;</span> filter_reconnect at ffffffffa090d32e <span class="error">&#91;obdfilter&#93;</span><br/> #10 <span class="error">&#91;ffff880bc823ba38&#93;</span> target_handle_connect at ffffffffa0598122 <span class="error">&#91;ptlrpc&#93;</span><br/> #11 <span class="error">&#91;ffff880bc823bbf8&#93;</span> ost_handle at ffffffffa08dfdfb <span class="error">&#91;ost&#93;</span><br/> #12 <span class="error">&#91;ffff880bc823bd68&#93;</span> ptlrpc_main at ffffffffa05df459 <span class="error">&#91;ptlrpc&#93;</span><br/> #13 <span class="error">&#91;ffff880bc823bf48&#93;</span> kernel_thread at ffffffff810041aa<br/> crash&gt;<br/> ======================================</p> <p>BTW, first crash-dump analysis indicate a race over "((struct obd_export *)0xffff880b4b4df000)-&gt;exp_nid_stats" which has been NULL'ed during panic thread reference when calling/inlining lprocfs_init_rw_stats() in filter_export_stats_init() ...</p> <p>So there may be some more protective code to be added in lprocfs !!</p> <p>More debugging stuff/infos to come a soon as power will be back on our system ...</p> <p>I made some progress in the crash-dump (in fact we faced several occurences of this crash on different OSSes) and my assumption is that the race occurs during a huge number of Clients/exports disconnects on multiple OSTs/targets at a time, according to the huge number of "LustreError: &lt;tgt_recov_PID&gt;:0:(genops.c:1270:class_disconnect_stale_exports()) &lt;OST_name&gt;: disconnect stale client &lt;Client_UUID&gt;@&lt;unknown&gt;" msgs beeing printed at the Console at the time of the crash ..., when a reconnect request arrive !!</p> <p>I think the race can occur because the "stale" exports disconnect algorithm works by protecting itself with obd_device-&gt;obd_dev_lock and then removing each obd_export from their "exp_obd_chain" list, when the <span class="error">&#91;re-&#93;</span>connect algorithm finds the concerned obd_export via cfs_hash_lookup() using the obd_device-&gt;obd_uuid_hash ... </p> <p>This allows an obd_export reference to be taken in target_handle_connect() prior to call filter_export_stats_init()/lprocfs_init_rw_stats() when during the same time on the other side/thread, the disconnect algorithm will finally, but too late, unlink the obd_export from hashing (obd_disconnect()/fiter_disconnect()/server_disconnect_export()/class_disconnect()/class_unlink_export() and also clear/NULL obd_export-&gt;exp_nid_stats via class_export_put()/lprocfs_exp_cleanup().</p> <p>Does this sound you like a reasonable scenario for the race ??</p> <p>Bruno, your analysis looks reasonable: disconnected export may still get found, this is wrong; IMHO during connect, if the export is being disconnected, this export should not be reused, but create a new one instead.</p> <p>In last comment I said connect/disconnect should be serialized, however the real issue here is that 'connect' doesn't hold an export refcount in the process, and at the meantime another disconnect is called and put the last refcount of the export. Thought the way I said should work, there is a simpler way to fix: take export refcount in connect.</p> <p>I'll commit the fix later.</p> <p>Review is on <a href="http://review.whamcloud.com/#change,2345" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/#change,2345</a>.</p> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-master/./arch=i686,build_type=client,distro=el6,ib_stack=inkernel/527/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » i686,client,el6,inkernel #527</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-master/./arch=i686,build_type=server,distro=el6,ib_stack=inkernel/527/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » i686,server,el6,inkernel #527</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-master/./arch=i686,build_type=client,distro=el6,ib_stack=ofa/527/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » i686,client,el6,ofa #527</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-master/./arch=i686,build_type=server,distro=el6,ib_stack=ofa/527/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » i686,server,el6,ofa #527</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-master/./arch=i686,build_type=client,distro=el5,ib_stack=ofa/527/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » i686,client,el5,ofa #527</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=client,distro=sles11,ib_stack=inkernel/527/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,client,sles11,inkernel #527</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=client,distro=el6,ib_stack=ofa/527/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,client,el6,ofa #527</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-master/./arch=i686,build_type=server,distro=el5,ib_stack=ofa/527/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » i686,server,el5,ofa #527</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=client,distro=ubuntu1004,ib_stack=inkernel/527/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,client,ubuntu1004,inkernel #527</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=server,distro=el5,ib_stack=ofa/527/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,server,el5,ofa #527</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=server,distro=el6,ib_stack=inkernel/527/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,server,el6,inkernel #527</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-master/./arch=i686,build_type=client,distro=el5,ib_stack=inkernel/527/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » i686,client,el5,inkernel #527</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=client,distro=el6,ib_stack=inkernel/527/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,client,el6,inkernel #527</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=server,distro=el5,ib_stack=inkernel/527/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,server,el5,inkernel #527</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-master/./arch=i686,build_type=server,distro=el5,ib_stack=inkernel/527/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » i686,server,el5,inkernel #527</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=client,distro=el5,ib_stack=inkernel/527/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,client,el5,inkernel #527</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=server,distro=el6,ib_stack=ofa/527/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,server,el6,ofa #527</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=client,distro=el5,ib_stack=ofa/527/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,client,el5,ofa #527</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Landed for 2.3</p> <p>Needed on 2.1. The ball was dropped here, it appears.</p> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-b2_1/./arch=x86_64,build_type=client,distro=sles11,ib_stack=inkernel/48/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b2_1 » x86_64,client,sles11,inkernel #48</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 2c8b70becc8da305b687509febbdd6f8de95cf10)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b2_1&amp;a=commit&amp;h=2c8b70becc8da305b687509febbdd6f8de95cf10" class="external-link" target="_blank" rel="nofollow noopener">2c8b70becc8da305b687509febbdd6f8de95cf10</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-b2_1/./arch=x86_64,build_type=client,distro=el6,ib_stack=inkernel/48/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b2_1 » x86_64,client,el6,inkernel #48</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 2c8b70becc8da305b687509febbdd6f8de95cf10)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b2_1&amp;a=commit&amp;h=2c8b70becc8da305b687509febbdd6f8de95cf10" class="external-link" target="_blank" rel="nofollow noopener">2c8b70becc8da305b687509febbdd6f8de95cf10</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-b2_1/./arch=x86_64,build_type=server,distro=el5,ib_stack=inkernel/48/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b2_1 » x86_64,server,el5,inkernel #48</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 2c8b70becc8da305b687509febbdd6f8de95cf10)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b2_1&amp;a=commit&amp;h=2c8b70becc8da305b687509febbdd6f8de95cf10" class="external-link" target="_blank" rel="nofollow noopener">2c8b70becc8da305b687509febbdd6f8de95cf10</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-b2_1/./arch=i686,build_type=server,distro=el5,ib_stack=inkernel/48/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b2_1 » i686,server,el5,inkernel #48</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 2c8b70becc8da305b687509febbdd6f8de95cf10)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b2_1&amp;a=commit&amp;h=2c8b70becc8da305b687509febbdd6f8de95cf10" class="external-link" target="_blank" rel="nofollow noopener">2c8b70becc8da305b687509febbdd6f8de95cf10</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-b2_1/./arch=i686,build_type=server,distro=el6,ib_stack=inkernel/48/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b2_1 » i686,server,el6,inkernel #48</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 2c8b70becc8da305b687509febbdd6f8de95cf10)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b2_1&amp;a=commit&amp;h=2c8b70becc8da305b687509febbdd6f8de95cf10" class="external-link" target="_blank" rel="nofollow noopener">2c8b70becc8da305b687509febbdd6f8de95cf10</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-b2_1/./arch=x86_64,build_type=server,distro=el5,ib_stack=ofa/48/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b2_1 » x86_64,server,el5,ofa #48</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 2c8b70becc8da305b687509febbdd6f8de95cf10)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b2_1&amp;a=commit&amp;h=2c8b70becc8da305b687509febbdd6f8de95cf10" class="external-link" target="_blank" rel="nofollow noopener">2c8b70becc8da305b687509febbdd6f8de95cf10</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-b2_1/./arch=i686,build_type=server,distro=el5,ib_stack=ofa/48/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b2_1 » i686,server,el5,ofa #48</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 2c8b70becc8da305b687509febbdd6f8de95cf10)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b2_1&amp;a=commit&amp;h=2c8b70becc8da305b687509febbdd6f8de95cf10" class="external-link" target="_blank" rel="nofollow noopener">2c8b70becc8da305b687509febbdd6f8de95cf10</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-b2_1/./arch=i686,build_type=client,distro=el6,ib_stack=inkernel/48/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b2_1 » i686,client,el6,inkernel #48</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 2c8b70becc8da305b687509febbdd6f8de95cf10)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b2_1&amp;a=commit&amp;h=2c8b70becc8da305b687509febbdd6f8de95cf10" class="external-link" target="_blank" rel="nofollow noopener">2c8b70becc8da305b687509febbdd6f8de95cf10</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-b2_1/./arch=x86_64,build_type=client,distro=el5,ib_stack=inkernel/48/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b2_1 » x86_64,client,el5,inkernel #48</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 2c8b70becc8da305b687509febbdd6f8de95cf10)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b2_1&amp;a=commit&amp;h=2c8b70becc8da305b687509febbdd6f8de95cf10" class="external-link" target="_blank" rel="nofollow noopener">2c8b70becc8da305b687509febbdd6f8de95cf10</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-b2_1/./arch=i686,build_type=client,distro=el5,ib_stack=ofa/48/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b2_1 » i686,client,el5,ofa #48</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 2c8b70becc8da305b687509febbdd6f8de95cf10)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b2_1&amp;a=commit&amp;h=2c8b70becc8da305b687509febbdd6f8de95cf10" class="external-link" target="_blank" rel="nofollow noopener">2c8b70becc8da305b687509febbdd6f8de95cf10</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-b2_1/./arch=x86_64,build_type=client,distro=el5,ib_stack=ofa/48/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b2_1 » x86_64,client,el5,ofa #48</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 2c8b70becc8da305b687509febbdd6f8de95cf10)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b2_1&amp;a=commit&amp;h=2c8b70becc8da305b687509febbdd6f8de95cf10" class="external-link" target="_blank" rel="nofollow noopener">2c8b70becc8da305b687509febbdd6f8de95cf10</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-b2_1/./arch=i686,build_type=client,distro=el5,ib_stack=inkernel/48/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b2_1 » i686,client,el5,inkernel #48</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 2c8b70becc8da305b687509febbdd6f8de95cf10)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b2_1&amp;a=commit&amp;h=2c8b70becc8da305b687509febbdd6f8de95cf10" class="external-link" target="_blank" rel="nofollow noopener">2c8b70becc8da305b687509febbdd6f8de95cf10</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-b2_1/./arch=x86_64,build_type=server,distro=el6,ib_stack=inkernel/48/" class="external-link" target="_blank" rel="nofollow noopener">lustre-b2_1 » x86_64,server,el6,inkernel #48</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 2c8b70becc8da305b687509febbdd6f8de95cf10)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/b2_1&amp;a=commit&amp;h=2c8b70becc8da305b687509febbdd6f8de95cf10" class="external-link" target="_blank" rel="nofollow noopener">2c8b70becc8da305b687509febbdd6f8de95cf10</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-dev/./arch=x86_64,build_type=client,distro=el5,ib_stack=inkernel/340/" class="external-link" target="_blank" rel="nofollow noopener">lustre-dev » x86_64,client,el5,inkernel #340</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-dev.git;a=shortlog;h=refs/heads/$GIT_BRANCH&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-dev/./arch=i686,build_type=client,distro=el6,ib_stack=inkernel/340/" class="external-link" target="_blank" rel="nofollow noopener">lustre-dev » i686,client,el6,inkernel #340</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-dev.git;a=shortlog;h=refs/heads/$GIT_BRANCH&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-dev/./arch=i686,build_type=server,distro=el5,ib_stack=inkernel/340/" class="external-link" target="_blank" rel="nofollow noopener">lustre-dev » i686,server,el5,inkernel #340</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-dev.git;a=shortlog;h=refs/heads/$GIT_BRANCH&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-dev/./arch=x86_64,build_type=server,distro=el6,ib_stack=inkernel/340/" class="external-link" target="_blank" rel="nofollow noopener">lustre-dev » x86_64,server,el6,inkernel #340</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-dev.git;a=shortlog;h=refs/heads/$GIT_BRANCH&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-dev/./arch=i686,build_type=client,distro=el5,ib_stack=inkernel/340/" class="external-link" target="_blank" rel="nofollow noopener">lustre-dev » i686,client,el5,inkernel #340</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-dev.git;a=shortlog;h=refs/heads/$GIT_BRANCH&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-dev/./arch=x86_64,build_type=server,distro=el5,ib_stack=inkernel/340/" class="external-link" target="_blank" rel="nofollow noopener">lustre-dev » x86_64,server,el5,inkernel #340</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-dev.git;a=shortlog;h=refs/heads/$GIT_BRANCH&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://build.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://build.whamcloud.com/job/lustre-dev/./arch=x86_64,build_type=client,distro=el6,ib_stack=inkernel/340/" class="external-link" target="_blank" rel="nofollow noopener">lustre-dev » x86_64,client,el6,inkernel #340</a><br/> <a href="https://jira.whamcloud.com/browse/LU-1092" title="NULL pointer dereference in filter_export_stats_init()" class="issue-link" data-issue-key="LU-1092"><del>LU-1092</del></a> ptlrpc: take export refcount during connect (Revision 893cf2014a38c5bd94890d3522fafe55f024a958)</p> <p> Result = SUCCESS<br/> Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-dev.git;a=shortlog;h=refs/heads/$GIT_BRANCH&amp;a=commit&amp;h=893cf2014a38c5bd94890d3522fafe55f024a958" class="external-link" target="_blank" rel="nofollow noopener">893cf2014a38c5bd94890d3522fafe55f024a958</a><br/> Files : </p> <ul> <li>lustre/ldlm/ldlm_lib.c</li> </ul> <p>Hi Siyao,</p> <p>We here at NASA Ames had a LBUG on <br/> LustreError: 6023:0:(genops.c:933:class_import_put()) ASSERTION(cfs_list_empty(&amp;imp-&gt;imp_zombie_chain)) failed</p> <p>That ASSERTION was mentioned in <a href="https://jira.whamcloud.com/browse/LU-1085" title="ASSERTION(cfs_atomic_read(&amp;exp-&gt;exp_refcount) == 0) failed" class="issue-link" data-issue-key="LU-1085"><del>LU-1085</del></a>, which was dup'ed to this LU.<br/> Does our failure look like the same problem as this LU?</p> <p>LustreError: 6023:0:(genops.c:933:class_import_put()) ASSERTION(cfs_list_empty(&amp;imp-&gt;imp_zombie_chain)) failed^M<br/> LustreError: 6023:0:(genops.c:933:class_import_put()) LBUG^M<br/> Pid: 6023, comm: ll_ost_365^M<br/> ^M<br/> Call Trace:^M<br/> <span class="error">&#91;&lt;ffffffffa0553855&gt;&#93;</span> libcfs_debug_dumpstack+0x55/0x80 <span class="error">&#91;libcfs&#93;</span>^M<br/> <span class="error">&#91;&lt;ffffffffa0553e95&gt;&#93;</span> lbug_with_loc+0x75/0xe0 <span class="error">&#91;libcfs&#93;</span>^M<br/> <span class="error">&#91;&lt;ffffffffa055eda6&gt;&#93;</span> libcfs_assertion_failed+0x66/0x70 <span class="error">&#91;libcfs&#93;</span>^M<br/> <span class="error">&#91;&lt;ffffffffa061fb67&gt;&#93;</span> class_import_put+0x2a7/0x300 <span class="error">&#91;obdclass&#93;</span>^M<br/> <span class="error">&#91;&lt;ffffffffa06346dc&gt;&#93;</span> ? class_handle_unhash+0x3c/0x50 <span class="error">&#91;obdclass&#93;</span>^M<br/> <span class="error">&#91;&lt;ffffffffa061fc1c&gt;&#93;</span> ? class_destroy_import+0x5c/0xb0 <span class="error">&#91;obdclass&#93;</span>^M<br/> <span class="error">&#91;&lt;ffffffffa070e92e&gt;&#93;</span> client_destroy_import+0x2e/0x40 <span class="error">&#91;ptlrpc&#93;</span>^M<br/> <span class="error">&#91;&lt;ffffffffa071058e&gt;&#93;</span> target_handle_connect+0xece /0 x72 do4u0t <span class="error">&#91;ofpt 8lr cpcpu&#93;</span>^Ms<br/> <span class="error">&#91;&lt;ffffffff81052ed5&gt;&#93;</span> ? select_idle_sibling+0x95/0x150^M<br/> <span class="error">&#91;&lt;ffffffffa0749b7c&gt;&#93;</span> ? lustre_msg_get_version+0x7c/0xe0 <span class="error">&#91;ptlrpc&#93;</span>^M<br/> <span class="error">&#91;&lt;ffffffffa0749ca8&gt;&#93;</span> ? lustre_msg_check_version+0xc8/0xe0 <span class="error">&#91;ptlrpc&#93;</span>^M<br/> <span class="error">&#91;&lt;ffffffffa081276b&gt;&#93;</span> ost_handle+0x244b/0x4ba0 <span class="error">&#91;ost&#93;</span>^M<br/> <span class="error">&#91;&lt;ffffffffa0a02ac6&gt;&#93;</span> ? vvp_session_key_init+0x76/0x1d0 <span class="error">&#91;lustre&#93;</span>^M<br/> <span class="error">&#91;&lt;ffffffffa0747954&gt;&#93;</span> ? lustre_msg_get_opc+0x94/0x100 <span class="error">&#91;ptlrpc&#93;</span>^M<br/> <span class="error">&#91;&lt;ffffffffa075842e&gt;&#93;</span> ptlrpc_main+0xb7e/0x18f0 <span class="error">&#91;ptlrpc&#93;</span>^M<br/> <span class="error">&#91;&lt;ffffffffa07578b0&gt;&#93;</span> ? ptlrpc_main+0x0/0x18f0 <span class="error">&#91;ptlrpc&#93;</span>^M<br/> <span class="error">&#91;&lt;ffffffff8100c14a&gt;&#93;</span> child_rip+0xa/0x20^M<br/> <span class="error">&#91;&lt;ffffffffa07578b0&gt;&#93;</span> ? ptlrpc_main+0x0/0x18f0 <span class="error">&#91;ptlrpc&#93;</span>^M<br/> <span class="error">&#91;&lt;ffffffffa07578b0&gt;&#93;</span> ? ptlrpc_main+0x0/0x18f0 <span class="error">&#91;ptlrpc&#93;</span>^M<br/> <span class="error">&#91;&lt;ffffffff8100c140&gt;&#93;</span> ? child_rip+0x0/0x20^M</p> <p>No, IMO it's not the same issue. The backtrace shows a zombie import is being destroyed again, but this LU is about a issue of export race. At first sight, the export-&gt;exp_imp_reverse handling code in target_handle_connect() looks unsafe (no lock protected). In fact, the whole bunch of code about export/import refcounting looks a bit messy, if such panic still happens with all the patches mentioned by Oleg, we may need tidy up these code as a whole.</p> Development Rank 1|hzv733: Rank (Obsolete) 4682 Severity