From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.3) Gecko/20040922 Description of problem: useradd goes into an infinite loop if you try to add someone to a supplemental group that appears twice in the group file. Version-Release number of selected component (if applicable): shadow-utils-4.0.3-37 How reproducible: Always Steps to Reproduce: 1. echo dupgroup:x:505: >> /etc/group 2. echo dupgroup:x:506: >> /etc/group 3. /usr/bin/seuseradd -G dupgroup someuser Actual Results: Stuck in infinite loop, syslog messages being generated rapidly. Expected Results: Either quit with error message or add to the first group. Additional info: This bug report is the product of a painful elimination process.
it's already fixed in devel