Whamcloud Community JIRA https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 [LU-8774] copy_from_user() should not use MAX_STRING_SIZE https://jira.whamcloud.com/browse/LU-8774 Lustre <p>The following codes are incorrect:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>$ git grep "MAX_STRING_SIZE" | grep copy_from_user lustre/ldlm/ldlm_resource.c: if (copy_from_user(dummy, buffer, MAX_STRING_SIZE)) lustre/obdclass/lprocfs_status.c: if (copy_from_user(dummy, buffer, MAX_STRING_SIZE)) </pre> </div></div> <p>We should only copy enough bytes to cover count passed in.</p> LU-8774 copy_from_user() should not use MAX_STRING_SIZE Bug Minor Resolved Fixed Jian Yu Jian Yu Fri, 28 Oct 2016 03:51:18 +0000 Thu, 11 May 2017 15:15:56 +0000 Tue, 22 Nov 2016 08:46:42 +0000 Lustre 2.9.0 Lustre 2.9.0 0 6 <p>Jian Yu (jian.yu@intel.com) uploaded a new patch: <a href="http://review.whamcloud.com/23462" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/23462</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-8774" title="copy_from_user() should not use MAX_STRING_SIZE" class="issue-link" data-issue-key="LU-8774"><del>LU-8774</del></a> lprocfs: not use MAX_STRING_SIZE in copy_from_user<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: f5c8d723829ca7289c15d9820f730213e2b7c4f4</p> <p>Oleg Drokin (oleg.drokin@intel.com) merged in patch <a href="http://review.whamcloud.com/23462/" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/23462/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-8774" title="copy_from_user() should not use MAX_STRING_SIZE" class="issue-link" data-issue-key="LU-8774"><del>LU-8774</del></a> lprocfs: not use MAX_STRING_SIZE in copy_from_user<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: a9ae88bbaca0770f28f3c88a4afed6b99403aec6</p> <p>Patch landed to master branch for Lustre 2.9.0.</p> Duplicate Related Development Rank 1|hzytov: Rank (Obsolete) 9223372036854775807 Severity