http://bugzilla.opensuse.org/show_bug.cgi?id=974527 http://bugzilla.opensuse.org/show_bug.cgi?id=974527#c2 --- Comment #2 from John H. --- i copied the first mount line wrong. should be: mount //10.0.0.1/multimedia1 /media/multimedia1 mount -t overlayfs overlay -o=lowerdir=/media/multimedia1,upperdir=/media/multimedia2,workdir=/media/multimedia2/.work /media/multimedia -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=974527 http://bugzilla.opensuse.org/show_bug.cgi?id=974527#c4 David Disseldorp changed: What |Removed |Added ---------------------------------------------------------------------------- Assignee|kernel-maintainers@forge.pr |samba-maintainers@SuSE.de |ovo.novell.com | --- Comment #4 from David Disseldorp --- Thanks for the report John. (In reply to John H. from comment #0) ...

reading works fine, but after copying a file to overlayfs i get the following error:

cifs + overlayfs: BUG: unable to handle kernel NULL pointer dereference at 000000000000054c IP: [<ffffffffa082d2f8>] build_path_from_dentry+0x58/0x2e0 [cifs]

Looks like one for the Samba maintainers queue - reassigning accordingly. -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=974527 http://bugzilla.opensuse.org/show_bug.cgi?id=974527#c6 --- Comment #6 from Goldwyn Rodrigues --- Created attachment 672050 --> http://bugzilla.opensuse.org/attachment.cgi?id=672050&action=edit Proposed patch -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=974527 http://bugzilla.opensuse.org/show_bug.cgi?id=974527#c8 Goldwyn Rodrigues changed: What |Removed |Added ---------------------------------------------------------------------------- Attachment #672050|0 |1 is obsolete| | --- Comment #8 from Goldwyn Rodrigues --- Created attachment 672250 --> http://bugzilla.opensuse.org/attachment.cgi?id=672250&action=edit Proposed patch A test kernel with the patch mentioned is available at: https://build.suse.de/package/show/home:goldwynr:branches:Kernel:Tumbleweed:... Please let me know if it resolves this issue. -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=974527 http://bugzilla.opensuse.org/show_bug.cgi?id=974527#c10 John H. changed: What |Removed |Added ---------------------------------------------------------------------------- Flags|needinfo?(sebastian.kratz@p | |iraten-ahoi.de) | --- Comment #10 from John H. --- 1) with your patched kernel: putting an overlayfs over an ext4 lets me read fine, but writing fails with "operation not permitted" and dmesg has this line: EXT4-fs warning (device dm-3): ext4_file_open:381: Inconsistent encryption contexts: 553745/17957388 see also: https://lkml.org/lkml/2016/3/10/682 2) trying to create a file with vim results in vim complaining 'Found a swap file by the name ".ffa.swp"' despite that the file did not exist before (neither did the swap file). 3) putting overlayfs over btrfs and trying to write: [ +50.912545] BUG: unable to handle kernel paging request at 000000001beae272 [ +0.001006] IP: [<ffffffffa03eabd7>] btrfs_sync_file+0xd7/0x3b0 [btrfs] [ +0.001048] PGD 19f6cb067 PUD 19f6ca067 PMD 0 [ +0.000998] Oops: 0002 [#1] PREEMPT SMP [ +0.000631] Modules linked in: overlay xts gf128mul arc4 md4 md5 nls_utf8 cifs dns_resolver fscache fuse zram lz4_compress af_packet nf_log_ipv6 xt_pkttype nf_log_ipv4 nf_log_common xt_LOG xt_limit iscsi_ibft iscsi_boot_sysfs msr dm_crypt ecb algif_skcipher af_alg snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi snd_hda_intel dm_mod snd_hda_codec gpio_ich snd_hda_core iTCO_wdt ip6t_REJECT iTCO_vendor_support nf_reject_ipv6 xt_tcpudp snd_hwdep nf_conntrack_ipv6 coretemp joydev snd_pcm nf_defrag_ipv6 acpi_cpufreq lpc_ich snd_timer r8169 mii ppdev tpm_tis 8250_fintek parport_pc parport tpm fjes snd kvm_intel i2c_i801 kvm ip6table_raw soundcore shpchp irqbypass ipt_REJECT nf_reject_ipv4 iptable_raw xt_CT iptable_filter ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_ipv4 [ +0.000000] nf_defrag_ipv4 ip_tables xt_conntrack nf_conntrack ip6table_filter ip6_tables x_tables btrfs xor raid6_pq hid_generic usbhid ata_generic ata_piix serio_raw ehci_pci amdkfd amd_iommu_v2 radeon uhci_hcd ehci_hcd usbcore button usb_common i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm drm sg [ +0.000000] CPU: 0 PID: 4333 Comm: vim Not tainted 4.6.0-rc2-1.ge3ece45-default #1 [ +0.011753] Hardware name: FUJITSU ESPRIMO P2560 /D3041-A1, BIOS 6.00 R1.02.3041.A1 11/09/2010 [ +0.000000] task: ffff8800cbbf42c0 ti: ffff88004e5fc000 task.ti: ffff88004e5fc000 [ +0.000000] RIP: 0010:[<ffffffffa03eabd7>] [<ffffffffa03eabd7>] btrfs_sync_file+0xd7/0x3b0 [btrfs] [ +0.000000] RSP: 0018:ffff88004e5ffe48 EFLAGS: 00010246 [ +0.000000] RAX: ffff8800cbbf42c0 RBX: ffff88018c13bc00 RCX: 0000000000000000 [ +0.000000] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801908ea988 [ +0.000000] RBP: ffff88004e5ffec8 R08: 0000000000000001 R09: 0000000000000000 [ +0.000000] R10: 000000000000009b R11: 0000000000000246 R12: ffff8801908ea8e0 [ +0.000000] R13: ffff8801908ea988 R14: 0000000000000000 R15: 000000001beadf3e [ +0.000000] FS: 00007f5796be1780(0000) GS:ffff88019fc00000(0000) knlGS:0000000000000000 [ +0.000000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ +0.000000] CR2: 000000001beae272 CR3: 00000000cfe53000 CR4: 00000000000406f0 [ +0.000000] Stack: [ +0.000000] ffff88004e5ffec8 ffffffff81215897 000000000154b0c0 8000000000000000 [ +0.000000] ffff880028ecc540 7fffffffffffffff 0000000000000000 0000000000000000 [ +0.000000] 0000000000000000 0000000000000000 0000000000000000 ffff88018c13bc00 [ +0.000000] Call Trace: [ +0.000000] [<ffffffff81248bab>] vfs_fsync_range+0x4b/0xb0 [ +0.000000] [<ffffffff81248c6d>] do_fsync+0x3d/0x70 [ +0.000000] [<ffffffff81248ee0>] SyS_fsync+0x10/0x20 [ +0.000000] [<ffffffff816e4cb6>] entry_SYSCALL_64_fastpath+0x1e/0xa8 [ +0.000000] DWARF2 unwinder stuck at entry_SYSCALL_64_fastpath+0x1e/0xa8 [ +0.000000] Leftover inexact backtrace: [ +0.000000] Code: 0f 84 28 01 00 00 eb 86 48 8b 45 a8 4c 8b 75 b0 4d 8d ac 24 a8 00 00 00 4c 89 ef 4c 29 f0 48 83 c0 01 48 89 45 98 e8 c9 7b 2f e1 <f0> 41 ff 87 34 03 00 00 49 8b 84 24 58 ff ff ff 48 c1 e8 07 83 [ +0.000000] RIP [<ffffffffa03eabd7>] btrfs_sync_file+0xd7/0x3b0 [btrfs] [ +0.000000] RSP <ffff88004e5ffe48> [ +0.000000] CR2: 000000001beae272 [ +0.063653] ---[ end trace 05c93250fd618d94 ]--- 4) trying to write a file with vim results in vim being killed, but the file being created and: [Apr14 12:46] BUG: unable to handle kernel NULL pointer dereference at 0000000000000334 [ +0.002458] IP: [<ffffffffa03eabd7>] btrfs_sync_file+0xd7/0x3b0 [btrfs] [ +0.001060] PGD 104d2b067 PUD 18e2a4067 PMD 0 [ +0.002924] Oops: 0002 [#2] PREEMPT SMP [ +0.001809] Modules linked in: overlay xts gf128mul arc4 md4 md5 nls_utf8 cifs dns_resolver fscache fuse zram lz4_compress af_packet nf_log_ipv6 xt_pkttype nf_log_ipv4 nf_log_common xt_LOG xt_limit iscsi_ibft iscsi_boot_sysfs msr dm_crypt ecb algif_skcipher af_alg snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi snd_hda_intel dm_mod snd_hda_codec gpio_ich snd_hda_core iTCO_wdt ip6t_REJECT iTCO_vendor_support nf_reject_ipv6 xt_tcpudp snd_hwdep nf_conntrack_ipv6 coretemp joydev snd_pcm nf_defrag_ipv6 acpi_cpufreq lpc_ich snd_timer r8169 mii ppdev tpm_tis 8250_fintek parport_pc parport tpm fjes snd kvm_intel i2c_i801 kvm ip6table_raw soundcore shpchp irqbypass ipt_REJECT nf_reject_ipv4 iptable_raw xt_CT iptable_filter ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_ipv4 [ +0.000000] nf_defrag_ipv4 ip_tables xt_conntrack nf_conntrack ip6table_filter ip6_tables x_tables btrfs xor raid6_pq hid_generic usbhid ata_generic ata_piix serio_raw ehci_pci amdkfd amd_iommu_v2 radeon uhci_hcd ehci_hcd usbcore button usb_common i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm drm sg [ +0.000000] CPU: 0 PID: 4645 Comm: vim Tainted: G D 4.6.0-rc2-1.ge3ece45-default #1 [ +0.000000] Hardware name: FUJITSU ESPRIMO P2560 /D3041-A1, BIOS 6.00 R1.02.3041.A1 11/09/2010 [ +0.000000] task: ffff88004e5be040 ti: ffff88018c500000 task.ti: ffff88018c500000 [ +0.000000] RIP: 0010:[<ffffffffa03eabd7>] [<ffffffffa03eabd7>] btrfs_sync_file+0xd7/0x3b0 [btrfs] [ +0.000000] RSP: 0018:ffff88018c503e48 EFLAGS: 00010246 [ +0.000000] RAX: ffff88004e5be040 RBX: ffff880197deb700 RCX: 0000000000000000 [ +0.000000] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff880028efc988 [ +0.000000] RBP: ffff88018c503ec8 R08: 0000000000000001 R09: 0000000000000000 [ +0.000000] R10: 000000000000009b R11: 0000000000000246 R12: ffff880028efc8e0 [ +0.000000] R13: ffff880028efc988 R14: 0000000000000000 R15: 0000000000000000 [ +0.000000] FS: 00007efde42c0780(0000) GS:ffff88019fc00000(0000) knlGS:0000000000000000 [ +0.000000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ +0.000000] CR2: 0000000000000334 CR3: 000000018a11f000 CR4: 00000000000406f0 [ +0.000000] Stack: [ +0.000000] ffff88018c503ec8 ffffffff81215897 00000000014e2910 8000000000000000 [ +0.000000] ffff880050a6a000 7fffffffffffffff 0000000000000000 0000000000000000 [ +0.000000] 0000000000000000 0000000000000000 0000000000000000 ffff880197deb700 [ +0.000000] Call Trace: [ +0.000000] [<ffffffff81248bab>] vfs_fsync_range+0x4b/0xb0 [ +0.000000] [<ffffffff81248c6d>] do_fsync+0x3d/0x70 [ +0.000000] [<ffffffff81248ee0>] SyS_fsync+0x10/0x20 [ +0.000000] [<ffffffff816e4cb6>] entry_SYSCALL_64_fastpath+0x1e/0xa8 [ +0.000000] DWARF2 unwinder stuck at entry_SYSCALL_64_fastpath+0x1e/0xa8 [ +0.000000] Leftover inexact backtrace: [ +0.099651] Code: 0f 84 28 01 00 00 eb 86 48 8b 45 a8 4c 8b 75 b0 4d 8d ac 24 a8 00 00 00 4c 89 ef 4c 29 f0 48 83 c0 01 48 89 45 98 e8 c9 7b 2f e1 <f0> 41 ff 87 34 03 00 00 49 8b 84 24 58 ff ff ff 48 c1 e8 07 83 [ +0.003446] RIP [ +0.000000] [<ffffffffa03eabd7>] btrfs_sync_file+0xd7/0x3b0 [btrfs] [ +0.000000] RSP <ffff88018c503e48> [ +0.000000] CR2: 0000000000000334 [ +0.001755] ---[ end trace 05c93250fd618d95 ]--- -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=974527 http://bugzilla.opensuse.org/show_bug.cgi?id=974527#c12 --- Comment #12 from John H. --- forgot to mention: the lowerdir was always an smb share. -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=974527 http://bugzilla.opensuse.org/show_bug.cgi?id=974527#c14 Goldwyn Rodrigues changed: What |Removed |Added ---------------------------------------------------------------------------- Flags| |needinfo?(sebastian.kratz@p | |iraten-ahoi.de) --- Comment #14 from Goldwyn Rodrigues --- The following project has upstream fixes for ext4, nfs, btrfs and cifs. Could you please test it? https://build.opensuse.org/package/show/home:goldwynr:branches:Kernel:Tumble... -- You are receiving this mail because: You are on the CC list for the bug.

http://bugzilla.opensuse.org/show_bug.cgi?id=974527 http://bugzilla.opensuse.org/show_bug.cgi?id=974527#c16 Goldwyn Rodrigues changed: What |Removed |Added ---------------------------------------------------------------------------- Flags|needinfo?(sebastian.kratz@p | |iraten-ahoi.de) | --- Comment #16 from Goldwyn Rodrigues --- (In reply to John H. from comment #15)

thank you, overlayfs over btrfs and ext4 seems to work. mount --bind also seems to work over overlayfs, as does any other mount over it i tried. good work.

Thanks for the feedback.

the only problem remains is with SOME german umlauts via smb. creating a file "ä" works, but the following file name is - according to nautilus - a "stale file handle" (which prevents me from opening the dir completly!):

This is a different problem and we would appreciate a new bugzilla entry for this. -- You are receiving this mail because: You are on the CC list for the bug.