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Description of problem: If a command is run that isn't in the path, then the command_not_found_handle() bash helper could attempt to run `basename`. However, if the path is not set properly, then basename may not be found - which triggers command_not_found_handler() - which leads to an infinite loop. Each loop launches a new instance of bash. Eventually the machine launches thousands of bash instances which causes the system to become unresponsive and then unstable. Common autoconf setup tools (eg, ./configure) purposely set an invalid path to attempt to determine the path separator character which triggers this error. Version-Release number of selected component (if applicable): PackageKit-command-not-found-1.0.11-1.fc23.x86_64 How reproducible: 100% Steps to Reproduce: 1. wget 'https://ftp.gnu.org/pub/gnu/ncurses/ncurses-5.9.tar.gz' 2. tar xfz ncurses-5.9.tar.gz ; cd ncurses-5.9 3. bash ./configure Actual results: System unresponsive leading to eventual system instability Expected results: configure script successfully runs Additional info: To trigger this issue, the configure script does need to be run with "bash ./configure" -- the issue does not occur if "./configure" is used. The openwrt build system uses the former, however, which is how I found this. Other packages (besides ncurses) that use the autoconf stuff also exhibit the same problem.
Hi, can I get an update on this error?
I hit the same bug yesterday. managed to save my session by launching a kill of all bash in a loop. The cleanest way to solve this would be to unregister the command_not_found_handler in the the handle and reenable it at the end.
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Fedora 23 changed to end-of-life (EOL) status on 2016-12-20. Fedora 23 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.