[Bugme-new] [Bug 6703] New: kernel BUG at fs/inode.c:253 with LUFS

[bugme-daemon at bugzilla.kernel.org]

http://bugzilla.kernel.org/show_bug.cgi?id=6703

           Summary: kernel BUG at fs/inode.c:253 with LUFS
    Kernel Version: 2.6.16
            Status: NEW
          Severity: normal
             Owner: fs_other at kernel-bugs.osdl.org
         Submitter: jakub at rtfm.cz


Most recent kernel where this bug did not occur: don't know
Distribution: Debian Stable with backports.org (2.6.16-2-486 #2)
Hardware Environment: VIA EPIA C3 600MHz, 256MB SDRAM
Software Environment: lufs 0.9.7-6
Problem Description:

kernel BUG at fs/inode.c:253!
invalid opcode: 0000 [#10]
Modules linked in: ipv6 nfsd exportfs lockd nfs_acl sunrpc xt_tcpudp
iptable_mangle iptable_nat ip_nat xt_state ipt_REJECT ip_conntrack_ftp
ip_conntrack_irc iptable_filter ip_conntrack nfnetlink ip_tables x_tables
autofs4 fuse cpufreq_userspace lufs sr_mod sbp2 scsi_mod ide_generic ide_cd
cdrom eth1394 shpchp pci_hotplug evdev psmouse via_ircc serio_raw pcspkr via_agp
rtc agpgart floppy irda crc_ccitt ext3 jbd ide_disk ohci1394 ieee1394 ehci_hcd
uhci_hcd usbcore via82cxxx generic ide_core via_rhine mii thermal processor fan
CPU:    0
EIP:    0060:[<b015c0c8>]    Not tainted VLI
EFLAGS: 00010206   (2.6.16-2-486 #2)
EIP is at clear_inode+0x16/0xe4
eax: bb9acbcc   ebx: bb9acbcc   ecx: bb9acbcc   edx: bb9acbcc
esi: bfaf526d   edi: 00000080   ebp: befeeaa0   esp: b3537c44
ds: 007b   es: 007b   ss: 0068
Process proftpd (pid: 15401, threadinfo=b3536000 task=beee1a70)
Stack: <0>bb9acbcc bfaf526d b015cbe4 bb9acbcc bb9acbcc bc2190c0 b015cdcb bb9acbcc
       bc2190b4 b015ae4e bb9acbcc 00000640 00000000 00000080 b015b0ff 00000080
       b0137bd3 00000080 000201d2 00000000 000201d2 0004b000 00000000 00000640
Call Trace:
 [<bfaf526d>] lu_delete_inode+0x0/0x5 [lufs]
 [<b015cbe4>] generic_delete_inode+0x9d/0xfb
 [<b015cdcb>] iput+0x64/0x67
 [<b015ae4e>] prune_dcache+0xcf/0xf1
 [<b015b0ff>] shrink_dcache_memory+0x18/0x30
 [<b0137bd3>] shrink_slab+0x135/0x1a4
 [<b01389ac>] try_to_free_pages+0xe9/0x19b
 [<b0134eb1>] __alloc_pages+0x15f/0x25f
 [<b0136a8a>] __do_page_cache_readahead+0x8b/0xe9
 [<b0136be2>] blockable_page_cache_readahead+0x46/0x96
 [<b0136cac>] make_ahead_window+0x7a/0x97
 [<b0136dc4>] page_cache_readahead+0xfb/0x107
 [<b0131977>] do_generic_mapping_read+0xff/0x3b1
 [<b0221774>] sock_aio_write+0x56/0x64
 [<b0131e5b>] __generic_file_aio_read+0x16b/0x1a2
 [<b0131c29>] file_read_actor+0x0/0xc7
 [<b0131f8c>] generic_file_read+0xae/0xc7
 [<b01584a0>] locks_free_lock+0x81/0x85
 [<b0125056>] autoremove_wake_function+0x0/0x3a
 [<b02241fb>] sock_common_setsockopt+0x1e/0x22
 [<bfaf6388>] lu_file_read+0x24/0x29 [lufs]
 [<b01483d7>] vfs_read+0xa6/0x13c
 [<b01486d7>] sys_read+0x3b/0x63
 [<b01029c9>] syscall_call+0x7/0xb
Code: c7 42 04 c4 92 2d b0 89 15 c4 92 2d b0 ff 0d 08 e6 37 b0 5b c3 56 53 8b 5c
24 0c 53 e8 dc dd fe ff 83 bb c4 00 00 00 00 58 74 08 <0f> 0b fd 00 e0 04 2a b0
8b 83 28 01 00 00 a8 10 75 08 0f 0b ff
 <3>(lu_execute) - failed to connect!

Steps to reproduce:
Seems to be reproducable when extensively using LUFS with mounted FTP
filesystem. This mounted filesystem is the available via local FTP server. Start
downloading from the FTP server with at least two machines (or connections).
Then this bug occurs occasionaly.
I know LUFS is obsoleted, but FTPFS in FUSE is unusable and CurlFTPfs, which is
promising, drains all your memory when used with local FTP or SMB server

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