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-12094 Lustre <p>BUG: unable to handle kernel NULL pointer dereference at 00000000000003c4<br/> RIP: 0010:<span class="error">&#91;&lt;ffffffffa007b2cf&gt;&#93;</span> <span class="error">&#91;&lt;ffffffffa007b2cf&gt;&#93;</span> lprocfs_import_seq_write+0x11f/0x520 <span class="error">&#91;ptlrpc&#93;</span><br/> Call Trace:<br/> <span class="error">&#91;&lt;ffffffffa03830e7&gt;&#93;</span> mdc_import_seq_write+0x17/0x20 <span class="error">&#91;mdc&#93;</span><br/> <span class="error">&#91;&lt;ffffffff81229bcd&gt;&#93;</span> proc_reg_write+0x3d/0x70<br/> <span class="error">&#91;&lt;ffffffff811b5a78&gt;&#93;</span> vfs_write+0xb8/0x1d0<br/> <span class="error">&#91;&lt;ffffffff811b6899&gt;&#93;</span> SyS_write+0x69/0x110<br/> <span class="error">&#91;&lt;ffffffff815fc6d8&gt;&#93;</span> tracesys+0x8a/0xb0</p> <p>looks like a race as imp was NULL:<br/> (gdb) p &amp;((struct obd_import *)0)-&gt;imp_connect_data.ocd_instance<br/> $2 = (__u32 *) 0x3c4 &lt;_ldlm_lock_debug+228&gt;</p> LU-12094

NULL pointer dereference in lprocfs_import_seq_write

Bug Minor Resolved Fixed Alex Zhuravlev Alex Zhuravlev Thu, 21 Mar 2019 04:53:52 +0000 Fri, 24 Sep 2021 18:34:44 +0000 Sat, 7 Sep 2019 14:27:54 +0000 Lustre 2.13.0 0 2 <p>Alex Zhuravlev (bzzz@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/34479" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/34479</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-12094" title="NULL pointer dereference in lprocfs_import_seq_write" class="issue-link" data-issue-key="LU-12094"><del>LU-12094</del></a> ptlrpc: lprocfs_import_seq_write() should check imp<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: dde43d07cff5a2ed63d6c69aadd18b262c85b7d5</p> <p>James Simmons (jsimmons@infradead.org) uploaded a new patch: <a href="https://review.whamcloud.com/35853" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/35853</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-12094" title="NULL pointer dereference in lprocfs_import_seq_write" class="issue-link" data-issue-key="LU-12094"><del>LU-12094</del></a> obd: check if obd_import is protected in sysfs files<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 2bb5dac3c84d8532a3afe888b30032077b0fe574</p> <p>Oleg Drokin (green@whamcloud.com) merged in patch <a href="https://review.whamcloud.com/35853/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/35853/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-12094" title="NULL pointer dereference in lprocfs_import_seq_write" class="issue-link" data-issue-key="LU-12094"><del>LU-12094</del></a> ptlrpc: protect obd_import in lprocfs_import_seq_write<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 6d68eb9f73a0582ad5c215d210275ca20436f1d0</p> <p>ok, given Alex's patch was abandoned, looks like this is resolved</p> Development Rank 1|i00dm7: Rank (Obsolete) 9223372036854775807 Severity