This is an odd one. I can consistently reproduce it using the Xenial kernel (4.4.0-34.53-generic) but cannot reproduce it using other kernels.
u-d-f works when running under a development kernel build of 4.7. It also works when running under 4.7, 4.6, 4.5, and 4.4 kernels from http://kernel.ubuntu.com/~kernel-ppa/mainline/. -- 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/1612854 Title: ubuntu-device-flash snap doesn't work on eCryptfs encrypted home Status in linux package in Ubuntu: Triaged Bug description: Originally reported by Michael Vogt and investigated by Jamie Strandboge: 1. create a VM with 5G free space (at least) 2. create a testuser: sudo adduser --encrypt-home testuser 3. add the testuser to 'sudo': sudo adduser testuser sudo 4. login as test user and do: $ sudo snap install --devmode --edge ubuntu-device-flash $ sudo DEBUG_DISK=1 strace -o /tmp/trace -f -vv /snap/bin/ubuntu-device-flash core 16 --kernel canonical-snapdragon-linux --gadget canonical-dragon --os ubuntu-core --channel=edge -o $(pwd)/dragon.img [sudo] password for testuser: Determining gadget configuration 744.00 KB / 744.00 KB [=======================================] 100.00% 5.62 MB/s 0 Parallel unsquashfs: Using 1 processor 13 inodes (35 blocks) to write /tmp/gadget530855550/gadget/fake-gadget/1.0-fake /tmp/gadget530855550/gadget/fake-gadget/1.0-fake/README /tmp/gadget530855550/gadget/fake-gadget/1.0-fake/gpt.bin /tmp/gadget530855550/gadget/fake-gadget/1.0-fake/hyp.mbn /tmp/gadget530855550/gadget/fake-gadget/1.0-fake/meta /tmp/gadget530855550/gadget/fake-gadget/1.0-fake/meta/icon.png /tmp/gadget530855550/gadget/fake-gadget/1.0-fake/meta/snap.yaml /tmp/gadget530855550/gadget/fake-gadget/1.0-fake/rpm.mbn /tmp/gadget530855550/gadget/fake-gadget/1.0-fake/sbl1.mbn /tmp/gadget530855550/gadget/fake-gadget/1.0-fake/sd_appsboot.mbn /tmp/gadget530855550/gadget/fake-gadget/1.0-fake/sec.dat /tmp/gadget530855550/gadget/fake-gadget/1.0-fake/tz.mbn /tmp/gadget530855550/gadget/fake-gadget/1.0-fake/u-boot.img /tmp/gadget530855550/gadget/fake-gadget/1.0-fake/uboot.env /tmp/gadget530855550/gadget/fake-gadget/1.0-fake/uboot.env.in created 13 files created 2 directories created 0 symlinks created 0 devices created 0 fifos Error: Could not stat device /home/testuser/dragon.img - Permission denied. issues while partitioning From strace: 2007 lstat("/home", {st_dev=makedev(253, 1), st_ino=12, st_mode=S_IFDIR|0755, st_nlink=6, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, st_size=4096, st_atime=2016/08/12-06:05:24.897831278, st_mtime=2016/08/12-06:05:17.465732936, st_ctime=2016/08/12-06:05:17.465732936}) = 0 2007 lstat("/home/testuser", {st_dev=makedev(0, 40), st_ino=405, st_mode=S_IFDIR|0755, st_nlink=4, st_uid=1001, st_gid=1001, st_blksize=4096, st_blocks=8, st_size=4096, st_atime=2016/08/12-06:13:28.992000000, st_mtime=2016/08/12-06:14:42.907782272, st_ctime=2016/08/12-06:14:42.907782272}) = 0 2007 lstat("/home/testuser/dragon.img", 0x7ffe57228440) = -1 EACCES (Permission denied) But the file exists: $ stat ./dragon.img File: './dragon.img' Size: 3899999744 Blocks: 7617216 IO Block: 4096 regular file Device: 28h/40d Inode: 101 Links: 1 Access: (0644/-rw-r--r--) Uid: ( 1001/testuser) Gid: ( 1001/testuser) Access: 2016-08-12 06:41:46.871343338 -0500 Modify: 2016-08-12 06:41:46.871343338 -0500 Change: 2016-08-12 06:41:46.871343338 -0500 Birth: - Doing this in a non-ecryptfs dir: $ sudo mkdir /home/foo $ sudo chown testuser:testuser /home/foo $ cd /home/foo $ sudo DEBUG_DISK=1 strace -o /tmp/trace -f -vv /snap/bin/ubuntu-device-flash core 16 --kernel canonical-snapdragon-linux --gadget canonical-dragon --os ubuntu-core --channel=edge -o $(pwd)/dragon.img ... New image complete Summary: Output: /home/foo/dragon.img Architecture: arm64 Channel: edge Version: 0 Looking in this strace: 2032 lstat("/home", {st_dev=makedev(253, 1), st_ino=12, st_mode=S_IFDIR|0755, st_nlink=6, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, st_size=4096, st_atime=2016/08/12-06:05:24.897831278, st_mtime=2016/08/12-06:05:17.465732936, st_ctime=2016/08/12-06:05:17.465732936}) = 0 2032 lstat("/home/foo", {st_dev=makedev(253, 1), st_ino=107, st_mode=S_IFDIR|0755, st_nlink=2, st_uid=1001, st_gid=1001, st_blksize=4096, st_blocks=8, st_size=4096, st_atime=2016/08/12-06:15:28.732042881, st_mtime=2016/08/12-06:15:35.783602468, st_ctime=2016/08/12-06:15:35.783602468}) = 0 2032 lstat("/home/foo/dragon.img", {st_dev=makedev(253, 1), st_ino=85, st_mode=S_IFREG|0644, st_nlink=1, st_uid=1001, st_gid=1001, st_blksize=4096, st_blocks=0, st_size=3899999744, st_atime=2016/08/12-06:15:35.783602468, st_mtime=2016/08/12-06:15:35.783602468, st_ctime=2016/08/12-06:15:35.783602468}) = 0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1612854/+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
