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-17249 Lustre <p>There are evidences that list entry taken from <tt>scp_rqbd_idle</tt> in <tt>ptlrpc_service_purge_all()</tt> is used then being freed. From code that entry is taken from the list without any protection, so that is possible place when it is being freed at the same time.</p> <p>I wasn't able to reproduce that but it seems that is only place where it can happen and solution would be just take the same spinlock <tt>svcpt-&gt;scp_lock</tt> which is used in all other place where these <tt>rqbd_list</tt> linkage is being used</p> LU-17249

protect scp_rqbd_idle list operations in ptlrpc_service_purge_all()

Bug Minor Resolved Fixed Mikhail Pershin Mikhail Pershin Wed, 1 Nov 2023 14:53:54 +0000 Thu, 9 Nov 2023 13:37:01 +0000 Thu, 9 Nov 2023 13:37:01 +0000 Lustre 2.16.0 0 3 <p><a href="https://testing.whamcloud.com/test_sets/85afe042-b6a0-4dd1-b6c8-4fa1e15ce20f" class="external-link" target="_blank" rel="nofollow noopener">https://testing.whamcloud.com/test_sets/85afe042-b6a0-4dd1-b6c8-4fa1e15ce20f</a></p> <p><a href="https://testing.whamcloud.com/test_sets/cb2e8477-731a-4a66-8241-1c30198b42d5" class="external-link" target="_blank" rel="nofollow noopener">https://testing.whamcloud.com/test_sets/cb2e8477-731a-4a66-8241-1c30198b42d5</a></p> <p>So far there are two evidences of this issue with crash on attempt to free rqbd entry</p> <p>"Mikhail Pershin &lt;mpershin@whamcloud.com&gt;" uploaded a new patch: <a href="https://review.whamcloud.com/c/fs/lustre-release/+/52931" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/c/fs/lustre-release/+/52931</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-17249" title="protect scp_rqbd_idle list operations in ptlrpc_service_purge_all()" class="issue-link" data-issue-key="LU-17249"><del>LU-17249</del></a> ptlrpc: protect scp_rqbd_idle list operations<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 78f739c7fa03c1b3d429c69b39afbcb324302bcc</p> <p>"Oleg Drokin &lt;green@whamcloud.com&gt;" merged in patch <a href="https://review.whamcloud.com/c/fs/lustre-release/+/52931/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/c/fs/lustre-release/+/52931/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-17249" title="protect scp_rqbd_idle list operations in ptlrpc_service_purge_all()" class="issue-link" data-issue-key="LU-17249"><del>LU-17249</del></a> ptlrpc: protect scp_rqbd_idle list operations<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 9ba375983d498690f5caa29c289c137470a76505</p> <p>Landed for 2.16</p> Related Development Rank 1|i0409z: Rank (Obsolete) 9223372036854775807 Severity