Crash when trying to mount NCP volumes.

[Fernando Henrique Nakashoji]

Binary package hint: ncpfs

Desktop crashes to text mode, but I can recover with Alt-F6. The crash reports:

[ 5192.777413] ------------[ cut here ]------------
[ 5192.777524] kernel BUG at /build/buildd/linux-2.6.38/fs/dcache.c:2134!
[ 5192.777656] invalid opcode: 0000 [#1] SMP
[ 5192.777751] last sysfs file: /sys/devices/virtual/bdi/ncpfs-4/uevent
[ 5192.777884] Modules linked in: nls_cp850 nls_utf8 ncpfs vboxnetadp vboxnetflt vboxdrv ipheth binfmt_misc parport_pc ppdev tpm_infineon snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi radeon snd_rawmidi snd_seq_midi_event snd_seq ttm snd_timer drm_kms_helper snd_seq_device tpm_tis drm hp_wmi snd psmouse tpm tpm_bios sparse_keymap i2c_algo_bit serio_raw sp5100_tco soundcore k10temp i2c_piix4 snd_page_alloc shpchp lp parport usbhid hid usb_storage uas ahci tg3 libahci
[ 5192.779013]
[ 5192.779049] Pid: 2162, comm: gvfs-gdu-volume Not tainted 2.6.38-8-generic #42-Ubuntu Hewlett-Packard HP Compaq 6005 Pro SFF PC/3047h
[ 5192.779311] EIP: 0060:[<c11391d4>] EFLAGS: 00010246 CPU: 1
[ 5192.779429] EIP is at dentry_update_name_case+0x64/0x70
[ 5192.779536] EAX: 00000001 EBX: e77dcd00 ECX: 00000045 EDX: e7bd1bf4
[ 5192.779661] ESI: e77dcd00 EDI: e7bd1bf4 EBP: e7bd1b8c ESP: e7bd1b80
[ 5192.779787] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 5192.779897] Process gvfs-gdu-volume (pid: 2162, ti=e7bd0000 task=e4c0d860 task.ti=e7bd0000)
[ 5192.780062] Stack:
[ 5192.781373] e7bd1f30 e77dcd00 00000004 e7bd1d10 f98fafab e7bd1dad 00000009 00000000
[ 5192.781373] c1040ef2 f49068c0 c15198a0 c1136ac0 e7bd1f90 00000000 00000018 0012aa1a
[ 5192.781373] 4da75294 e5173628 e7bd1bf4 00000000 00000001 e77a21d8 00000002 ff81c000
[ 5192.781373] Call Trace:
[ 5192.781373] [<f98fafab>] ncp_fill_cache.clone.14+0x1cb/0x560 [ncpfs]
[ 5192.781373] [<c1040ef2>] ? dequeue_task_fair+0x72/0x80
[ 5192.781373] [<c1136ac0>] ? filldir64+0x0/0xf0
[ 5192.781373] [<c105e277>] ? mod_timer+0x117/0x250
[ 5192.781373] [<c102d8c8>] ? default_spin_lock_flags+0x8/0x10
[ 5192.781373] [<c150996f>] ? _raw_spin_lock_irqsave+0x2f/0x50
[ 5192.781373] [<f9901f4d>] ? ncp_req_put+0x1d/0x30 [ncpfs]
[ 5192.781373] [<f9902749>] ? do_ncp_rpc_call+0x159/0x290 [ncpfs]
[ 5192.781373] [<f99029b0>] ? ncp_do_request+0x130/0x160 [ncpfs]
[ 5192.781373] [<f99035b3>] ? ncp_request2+0x53/0x90 [ncpfs]
[ 5192.781373] [<f9903719>] ? ncp_unlock_server+0x29/0x40 [ncpfs]
[ 5192.781373] [<f990030d>] ? ncp_extract_file_info+0x6d/0xc0 [ncpfs]
[ 5192.781373] [<f98fb5c6>] ncp_do_readdir+0x186/0x1d0 [ncpfs]
[ 5192.781373] [<c1136ac0>] ? filldir64+0x0/0xf0
[ 5192.781373] [<c1136ac0>] ? filldir64+0x0/0xf0
[ 5192.781373] [<c1131286>] ? follow_managed+0xb6/0xe0
[ 5192.781373] [<c121bda4>] ? security_dentry_open+0x74/0x80
[ 5192.781373] [<c11252ea>] ? __dentry_open+0x1ca/0x280
[ 5192.781373] [<c113fd49>] ? vfsmount_lock_local_unlock+0x19/0x20
[ 5192.781373] [<c114139d>] ? mntput_no_expire+0x2d/0xd0
[ 5192.781373] [<c1141458>] ? mntput+0x18/0x30
[ 5192.781373] [<c102d8c8>] ? default_spin_lock_flags+0x8/0x10
[ 5192.781373] [<c150996f>] ? _raw_spin_lock_irqsave+0x2f/0x50
[ 5192.781373] [<c10fcc63>] ? page_address+0xd3/0xe0
[ 5192.781373] [<c10e27af>] ? find_or_create_page+0x2f/0xa0
[ 5192.781373] [<f98fbd8b>] ncp_readdir+0x1bb/0x570 [ncpfs]
[ 5192.781373] [<c1136ac0>] ? filldir64+0x0/0xf0
[ 5192.781373] [<c1136e0e>] vfs_readdir+0x8e/0xb0
[ 5192.781373] [<c1136ac0>] ? filldir64+0x0/0xf0
[ 5192.781373] [<c1136fba>] sys_getdents64+0x6a/0xc0
[ 5192.781373] [<c1509bf4>] syscall_call+0x7/0xb
[ 5192.781373] Code: 04 01 8b 43 1c 8b 57 08 8b 4f 04 e8 b7 1d 14 00 83 43 04 01 89 f0 e8 ac 46 ef ff 90 8b 1c 24 8b 74 24 04 8b 7c 24 08 89 ec 5d c3 <0f> 0b 0f 0b 90 8d b4 26 00 00 00 00 55 89 e5 83 ec 08 89 1c 24
[ 5192.781373] EIP: [<c11391d4>] dentry_update_name_case+0x64/0x70 SS:ESP 0068:e7bd1b80
[ 5193.017790] ---[ end trace f7c049bc526a66a8 ]---

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: ncpfs 2.2.6-8
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
Date: Mon May 2 18:11:53 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
ProcEnviron:
 LANGUAGE=pt_BR:en
 PATH=(custom, user)
 LANG=pt_BR.UTF-8
 LC_MESSAGES=pt_BR.UTF-8
 SHELL=/bin/bash
SourcePackage: ncpfs
UpgradeStatus: No upgrade log present (probably fresh install)

[Fernando Henrique Nakashoji (nakashoji)]

Dolphin also stops responding if I try to open the mount point.

[jessedyer (jessedyer)]

Me too. Very problematic; ncpfs is half the reason I use this os...

[Eric Farmer (farmer-r)]

After upgrading to 11.04 began having this problem. After a segfault, any further attempted operations on the mounted volume hang. Reboot is required to remove the stuck process.

Debugging Information Follows:

Aug 16 15:26:20 little-sister kernel: [ 4237.115189] ------------[ cut here ]------------
Aug 16 15:26:20 little-sister kernel: [ 4237.115754] kernel BUG at /build/buildd/linux-2.6.38/fs/dcache.c:2134!
Aug 16 15:26:20 little-sister kernel: [ 4237.116253] invalid opcode: 0000 [#2] SMP
Aug 16 15:26:20 little-sister kernel: [ 4237.116726] last sysfs file: /sys/devices/virtual/bdi/ncpfs-3/uevent
Aug 16 15:26:20 little-sister kernel: [ 4237.117205] CPU 0
Aug 16 15:26:20 little-sister kernel: [ 4237.117214] Modules linked in: nls_utf8 ncpfs ipx p8023 quota_v2 quota_tree nfsd exportfs nfs lockd fscache nfs_acl auth_rpcgss sunrpc nouveau ttm drm_kms_helper drm ppdev edac_core i2c_nforce2 parport_pc edac_mce_amd i2c_algo_bit lp k8temp video parport raid10 raid456 async_pq async_xor xor async_memcpy async_raid6_recov floppy 8139too 8139cp sata_nv raid6_pq async_tx pata_amd raid1 forcedeth raid0 multipath linear
Aug 16 15:26:20 little-sister kernel: [ 4237.119769]
Aug 16 15:26:20 little-sister kernel: [ 4237.120243] Pid: 4110, comm: ls Tainted: G D 2.6.38-10-server #46-Ubuntu FOXCONN MCP61M05/M61PMV
Aug 16 15:26:20 little-sister kernel: [ 4237.120757] RIP: 0010:[<ffffffff81179765>] [<ffffffff81179765>] dentry_update_name_case+0x75/0x80
Aug 16 15:26:20 little-sister kernel: [ 4237.121304] RSP: 0018:ffff880042e39988 EFLAGS: 00010246
Aug 16 15:26:20 little-sister kernel: [ 4237.121895] RAX: 0000000000000001 RBX: ffff880042e39e58 RCX: ffff880053f9da80
Aug 16 15:26:20 little-sister kernel: [ 4237.122488] RDX: 0000000000000000 RSI: ffff880042e39a98 RDI: ffff880053f9da80
Aug 16 15:26:20 little-sister kernel: [ 4237.123080] RBP: ffff880042e399a8 R08: 0000000000000056 R09: ffff880053f9dac3
Aug 16 15:26:20 little-sister kernel: [ 4237.123671] R10: ffffffffa0374000 R11: ffff880042e39aa8 R12: ffff880053f9da80
Aug 16 15:26:20 little-sister kernel: [ 4237.124256] R13: ffff880042e39a98 R14: 0000000000000000 R15: ffff880042e39c58
Aug 16 15:26:20 little-sister kernel: [ 4237.124846] FS: 00007fc54e2957c0(0000) GS:ffff880077c00000(0000) knlGS:0000000000000000
Aug 16 15:26:20 little-sister kernel: [ 4237.125140] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Aug 16 15:26:20 little-sister kernel: [ 4237.125140] CR2: 0000000001f49278 CR3: 00000000729f3000 CR4: 00000000000006f0
Aug 16 15:26:20 little-sister kernel: [ 4237.125140] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Aug 16 15:26:20 little-sister kernel: [ 4237.125140] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Aug 16 15:26:20 little-sister kernel: [ 4237.125140] Process ls (pid: 4110, threadinfo ffff880042e38000, task ffff880037135b80)
Aug 16 15:26:20 little-sister kernel: [ 4237.125140] Stack:
Aug 16 15:26:20 little-sister kernel: [ 4237.125140] ffff88006d495cc0 ffff880042e39e58 ffff88006d495cc0 ffff88005cde4048
Aug 16 15:26:20 little-sister kernel: [ 4237.125140] ffff880042e39be8 ffffffffa037a0bd ffff880042e39a18 ffffffff8100a777
Aug 16 15:26:...

[Christian Rank (c-rank)]

I also came across this problem with Ubuntu 11.04 (amd64) and found a solution here:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/762344

I followed the advice there and installed kernel 2.6.39-020639rc4 from kernel-ppa at
http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.39-rc4-natty/

This solved the problem.

However, it would be nice if the fix would be packported to an "official" kernel for natty.