This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1875667 and then change the status of the bug to 'Confirmed'. If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'. This change has been made by an automated script, maintained by the Ubuntu Kernel Team. ** Changed in: linux (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1875667 Title: root cannot flock user file in rwt dir if parent gives limited access Status in linux package in Ubuntu: Incomplete Bug description: 1. create folder by root 2. add wt permission flags to all in that folder 3. flock a file by user in that folder - success 4. flock the same file by root - error: Permission denied It is somehow important that user have limited access to parent folder (/ in this example). test@ubuntu20-04:~$ sudo rm -rf /t_rwt/ test@ubuntu20-04:~$ sudo mkdir /t_rwt test@ubuntu20-04:~$ sudo chmod a+wt /t_rwt test@ubuntu20-04:~$ flock /t_rwt/file echo aaa aaa test@ubuntu20-04:~$ sudo flock /t_rwt/file echo aaa flock: cannot open lock file /t_rwt/file: Permission denied test@ubuntu20-04:~$ ls -las /t_rwt total 8 4 drwxrwxrwt 2 root root 4096 Apr 28 08:01 . 4 drwxr-xr-x 26 root root 4096 Apr 28 08:00 .. 0 -rw-rw-r-- 1 test test 0 Apr 28 08:01 file test@ubuntu20-04:~$ id uid=1000(test) gid=1000(test) groups=1000(test),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),120(lpadmin),131(lxd),132(sambashare) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1875667/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp