I waited two releases after the "fix commited" announce. Still not fixed. Where's the fix? What version of what package?
This is current vivid. zoolook@venkman:~$ sudo lxc-attach -n dana root@dana:~# mailq postqueue: warning: close: Permission denied root@dana:~# uname -a Linux dana 3.19.0-20-generic #20-Ubuntu SMP Fri May 29 10:10:47 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux root@dana:~# dmesg | tail -n1 [ 4323.625556] audit: type=1400 audit(1433983568.106:2631): apparmor="DENIED" operation="file_perm" profile="lxc-container-default" name="public/showq" pid=29637 comm="postqueue" requested_mask="r" denied_mask="r" fsuid=0 ouid=0 -- 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/1390223 Title: Apparmor related regression on access to unix sockets on a candidate 3.16 backport kernel Status in linux package in Ubuntu: Fix Committed Status in linux source package in Utopic: Confirmed Status in linux source package in Vivid: Fix Committed Bug description: I recently noticed a bunch of containers failing in a rather odd way when running postfix. The most visible example is when running mailq on an empty queue. Without apparmor (unconfined container) I see that the queue is empty, with apparmor, I get Permission denied. That's all running as root so the permission denied looks a tiny bit odd. Also, running the 3.13 kernel, I don't get any of that weirdness. My guess is that it has to do with the work that went into the 3.16 kernel for socket mediation. In theory only systems that run the utopic apparmor (which I DO NOT) should be seeing that kind of behavior, but it looks like some code path isn't checking things properly :) == strace in unconfined container == chdir("/var/spool/postfix") = 0 rt_sigaction(SIGPIPE, {SIG_IGN, [PIPE], SA_RESTORER|SA_RESTART, 0x7f8963a62c30}, {SIG_IGN, [], 0}, 8) = 0 getuid() = 0 socket(PF_LOCAL, SOCK_STREAM, 0) = 4 fcntl(4, F_GETFL) = 0x2 (flags O_RDWR) fcntl(4, F_SETFL, O_RDWR) = 0 connect(4, {sa_family=AF_LOCAL, sun_path="public/showq"}, 110) = 0 poll([{fd=4, events=POLLIN}], 1, 3600000) = 1 ([{fd=4, revents=POLLIN|POLLHUP}]) read(4, "Mail queue is empty\n", 4096) = 20 poll([{fd=4, events=POLLIN}], 1, 3600000) = 1 ([{fd=4, revents=POLLIN|POLLHUP}]) read(4, "", 4096) = 0 write(1, "Mail queue is empty\n", 20Mail queue is empty ) = 20 close(4) = 0 exit_group(0) = ? +++ exited with 0 +++ == strace in confined container == chdir("/var/spool/postfix") = 0 rt_sigaction(SIGPIPE, {SIG_IGN, [PIPE], SA_RESTORER|SA_RESTART, 0x7ffe62de4c30}, {SIG_IGN, [], 0}, 8) = 0 getuid() = 0 socket(PF_LOCAL, SOCK_STREAM, 0) = 4 fcntl(4, F_GETFL) = 0x2 (flags O_RDWR) fcntl(4, F_SETFL, O_RDWR) = 0 connect(4, {sa_family=AF_LOCAL, sun_path="public/showq"}, 110) = 0 poll([{fd=4, events=POLLIN}], 1, 3600000) = 1 ([{fd=4, revents=POLLIN|POLLHUP}]) read(4, 0x7ffe65b35c00, 4096) = -1 EACCES (Permission denied) close(4) = 0 write(2, "postqueue: warning: close: Permi"..., 45postqueue: warning: close: Permission denied ) = 45 sendto(3, "<20>Nov 6 20:40:42 postfix/post"..., 78, MSG_NOSIGNAL, NULL, 0) = 78 exit_group(0) = ? Kernel is a slightly outdated version of the kernel from the kernel team PPA: Linux shell01 3.16.0-23-generic #31-Ubuntu SMP Thu Oct 23 20:13:35 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux If you think the latest build will improve this, I can test it, but seeing how this is a production server, I can't just flip kernels every 5 minutes (I'm running 3.16 to avoid a nasty btrfs bug on 3.13). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1390223/+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
