András Korn, this bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? If so, could you please test for this with the latest development release of Ubuntu? ISO images are available from http://cdimage.ubuntu.com /daily-live/current/ .
If it remains an issue, could you please run the following command in the development release from a Terminal (Applications->Accessories->Terminal), as it will automatically gather and attach updated debug information to this report: apport-collect -p linux <replace-with-bug-number> If reproducible, could you also please test the latest upstream kernel available (not the daily folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags: kernel-fixed-upstream kernel-fixed-upstream-VERSION-NUMBER where VERSION-NUMBER is the version number of the kernel you tested. For example: kernel-fixed-upstream-v3.13-rc6 This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag: needs-upstream-testing If the mainline kernel does not fix this bug, please add the following tags: kernel-bug-exists-upstream kernel-bug-exists-upstream-VERSION-NUMBER As well, please remove the tag: needs-upstream-testing Once testing of the upstream kernel is complete, please mark this bug's Status as Confirmed. Please let us know your results. Thank you for your understanding. ** Changed in: linux (Ubuntu) Status: Confirmed => 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/1081502 Title: posix acl permissions evaluated wrongly with null mask Status in “linux” package in Ubuntu: Incomplete Status in “linux” package in Debian: New Bug description: Hi! According to my experience the Linux Kernel Access Control evaluate wrongly the POSIX ACL-s when a mask is null (mask::---) Let's see an example: root@bar:~# getfacl /tmp/test getfacl: Removing leading '/' from absolute path names # file: tmp/test # owner: root # group: root user::rw- user:foo:--- group::r-- #effective:--- mask::--- ^^^^^ other::r-- As we can see the foo user hasn't got any rights on the test file and a mask is zero. Let's try to read the file as the foo user: foo@bar:~$ cat /tmp/test FOOBAR foo@bar:~$ Success. According to the documentation (man acl) user foo cannot access the file: " 2. else if the effective user ID of the process matches the qualifier of any entry of type ACL_USER, then if the matching ACL_USER entry and the ACL_MASK entry contain the requested permissions, access is granted, else access is denied." If I change the the mask entry to something else: root@bar:~# getfacl /tmp/test getfacl: Removing leading '/' from absolute path names # file: tmp/test # owner: root # group: root user::rw- user:foo:--- group::r-- #effective:--- mask::-w- ^^^^^^ other::r-- the foo user cannot read the file: foo@bar:~$ cat /tmp/test cat: /tmp/test: Permission denied I tested with ext4 and tmpfs with the same result. I also tested on a Solaris 9 machine where the permissions work as expected. System info: Description: Ubuntu 12.04.1 LTS Release: 12.04 acl: Installed: 2.2.51-5ubuntu1 Candidate: 2.2.51-5ubuntu1 Version table: *** 2.2.51-5ubuntu1 0 500 http://hu.archive.ubuntu.com/ubuntu/ precise/main i386 Packages 100 /var/lib/dpkg/status Linux bar 3.2.0-29-generic-pae #46-Ubuntu SMP Fri Jul 27 17:25:43 UTC 2012 i686 i686 i386 GNU/Linux Thank you for your time and I hope you can find the source of this issue. --- ApportVersion: 2.0.1-0ubuntu13 Architecture: i386 DistroRelease: Ubuntu 12.04 InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423) Package: linux PackageArchitecture: i386 ProcVersionSignature: Ubuntu 3.2.0-29.46-generic-pae 3.2.24 Tags: precise Uname: Linux 3.2.0-29-generic-pae i686 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1081502/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
