Just keeping this for reference:
mount -t aufs -o dirs=/rw:/ro=ro aufs /opt dev-48-gl kernel: [29940.627517] Oops: 0000 [#1] SMP- dev-48-gl kernel: [29940.627983] Process aufsd (pid: 11122, ti=f0aa4000 task=f086aca0 task.ti=f0aa4000) dev-48-gl kernel: [29940.628006] Stack: 00000000 f09f4cc0 f0ad0aa8 f0ad0ac0 00000000 c01b934d c016f8ff 01000000- dev-48-gl kernel: [29940.628019] 00000000 f0aa5e20 00000000 f0ad0b08 01000000 f0ad0bb4 001200d2 00000000- dev-48-gl kernel: [29940.628019] 00000000 00000000 00000000 00001000 00000000 00000000 00001000 c0157504- dev-48-gl kernel: [29940.628019] Call Trace: dev-48-gl kernel: [29940.628019] [] security_vm_enough_memory+0x17/0x18 dev-48-gl kernel: [29940.628019] [ ] shmem_getpage+0x3e1/0x55e dev-48-gl kernel: [29940.628019] [ ] generic_file_buffered_write+0xef/0x553 dev-48-gl kernel: [29940.628019] [ ] cap_inode_need_killpriv+0x25/0x35 dev-48-gl kernel: [29940.628019] [ ] security_inode_need_killpriv+0xc/0xd dev-48-gl kernel: [29940.628019] [ ] remove_suid+0x15/0x44 dev-48-gl kernel: [29940.628019] [ ] __generic_file_aio_write_nolock+0x468/0x4cb dev-48-gl kernel: [29940.628019] [ ] generic_file_aio_write+0x52/0xa9 dev-48-gl kernel: [29940.628019] [ ] do_sync_write+0xbf/0x100 dev-48-gl kernel: [29940.628019] [ ] autoremove_wake_function+0x0/0x2d dev-48-gl kernel: [29940.628019] [ ] hrtimer_start+0xf7/0x110 dev-48-gl kernel: [29940.628019] [ ] hrtick_set+0x8f/0xd8 dev-48-gl kernel: [29940.628019] [ ] do_sync_write+0x0/0x100 dev-48-gl kernel: [29940.628019] [ ] do_xino_fwrite+0x29/0x47 [aufs] dev-48-gl kernel: [29940.628019] [ ] do_sync_write+0x0/0x100 dev-48-gl kernel: [29940.628019] [ ] wkq_func+0x0/0x4a [aufs] dev-48-gl kernel: [29940.628019] [ ] call_do_xino_fwrite+0x1a/0x21 [aufs] dev-48-gl kernel: [29940.628019] [ ] wkq_func+0x9/0x4a [aufs] dev-48-gl kernel: [29940.628019] [ ] run_workqueue+0x74/0xf2 dev-48-gl kernel: [29940.628019] [ ] worker_thread+0x0/0xbd dev-48-gl kernel: [29940.628019] [ ] worker_thread+0xb3/0xbd dev-48-gl kernel: [29940.628019] [ ] autoremove_wake_function+0x0/0x2d dev-48-gl kernel: [29940.628019] [ ] kthread+0x38/0x5d dev-48-gl kernel: [29940.628019] [ ] kthread+0x0/0x5d dev-48-gl kernel: [29940.628019] [ ] kernel_thread_helper+0x7/0x10 dev-48-gl kernel: [29940.628019] ======================= dev-48-gl kernel: [29940.628019] Code: 00 ba 64 00 00 00 89 d5 31 d2 29 c3 0f af 1d 20 5f 35 c0 89 d8 f7 f5 85 ff 89 c1 75 05 c1 e8 05 29 c1 8b 14 24 03 0d 24 05 41 c0 <8b> 42 64 dev-48-gl kernel: [29940.628019] EIP: [ ] __vm_enough_memory+0xb3/0xdb SS:ESP 0068:f0aa5d4c