Thanks for the fast reply. I tried both kernels and was not able to trigger an Oops.
On the 4.4.0-98.121~lp1729637-generic kernel a hung task warning happened: [ +0.750497] unregister_netdevice: waiting for lo to become free. Usage count = 1 [ +0.992665] aufs au_opts_verify:1597:dockerd[1620]: dirperm1 breaks the protection by the permission bits on the lower branch [ +0.016910] aufs au_opts_verify:1597:dockerd[1620]: dirperm1 breaks the protection by the permission bits on the lower branch [ +0.015247] aufs au_opts_verify:1597:dockerd[1592]: dirperm1 breaks the protection by the permission bits on the lower branch [ +0.006387] device veth7d3bee3 entered promiscuous mode [ +0.000923] IPv6: ADDRCONF(NETDEV_UP): veth7d3bee3: link is not ready [ +9.051406] unregister_netdevice: waiting for lo to become free. Usage count = 1 [ +10.067531] unregister_netdevice: waiting for lo to become free. Usage count = 1 [ +10.083551] unregister_netdevice: waiting for lo to become free. Usage count = 1 [Nov 3 18:53] unregister_netdevice: waiting for lo to become free. Usage count = 1 [ +8.055656] INFO: task exe:2868 blocked for more than 120 seconds. [ +0.006363] Not tainted 4.4.0-98-generic #121~lp1729637 [ +0.005970] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ +0.008347] exe D ffff88012a0e3cb8 0 2868 1 0x00000000 [ +0.000006] ffff88012a0e3cb8 ffffffff821db9a0 ffffffff81e11500 ffff8800ba25f000 [ +0.000002] ffff88012a0e4000 ffffffff81ef7a64 ffff8800ba25f000 00000000ffffffff [ +0.000002] ffffffff81ef7a68 ffff88012a0e3cd0 ffffffff818405d5 ffffffff81ef7a60 [ +0.000002] Call Trace: [ +0.000011] [<ffffffff818405d5>] schedule+0x35/0x80 [ +0.000004] [<ffffffff8184087e>] schedule_preempt_disabled+0xe/0x10 [ +0.000003] [<ffffffff818424b9>] __mutex_lock_slowpath+0xb9/0x130 [ +0.000002] [<ffffffff8184254f>] mutex_lock+0x1f/0x30 [ +0.000007] [<ffffffff8172ea8e>] copy_net_ns+0x6e/0x120 [ +0.000010] [<ffffffff810a172b>] create_new_namespaces+0x11b/0x1d0 [ +0.000001] [<ffffffff810a184d>] copy_namespaces+0x6d/0xa0 [ +0.000005] [<ffffffff8107f1d2>] copy_process+0x8e2/0x1b30 [ +0.000003] [<ffffffff810805b0>] _do_fork+0x80/0x360 [ +0.000002] [<ffffffff81080939>] SyS_clone+0x19/0x20 [ +0.000004] [<ffffffff818446f2>] entry_SYSCALL_64_fastpath+0x16/0x71 [ +1.999139] unregister_netdevice: waiting for lo to become free. Usage count = 1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1729637 Title: Samba mount/umount in docker container triggers kernel Oops To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1729637/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
