* Stephen Hemminger <[EMAIL PROTECTED]> [2008-08-25 14:26]:
> On Mon, 25 Aug 2008 13:09:18 +0800
> Ian Kent <[EMAIL PROTECTED]> wrote:
>
> > Stephen Hemminger wrote:
> > > The following sequence of commands causes a kernel panic when
> > > run on 2.6.26.3 + unionfs 2.4. It also crashes on 2.6.25
> >
> > Were you able to get a kernel trace from syslog?
>
> BUG: unable to handle kernel paging request at d6448d50
> IP: [<d0a8f127>] :unionfs:__unionfs_file_revalidate+0xc7/0xd00
> Oops: 0000 [#1] SMP
> Modules linked in: unionfs iptable_filter xt_NOTRACK iptable_raw ip_tables
> x_tables nf_nat_pptp nf_conntrack_pptp nf_conntrack_proto_gre nf_nat_h323
> nf_conntrack_h323 nf_nat_sip nf_conntrack_sip nf_nat_proto_gre nf_nat_tftp
> nf_nat_ftp nf_nat nf_conntrack_ipv4 nf_conntrack_tftp nf_conntrack_ftp
> nf_conntrack ipv6 parport_pc parport rtc_cmos rtc_core rtc_lib serio_raw
> pcspkr psmouse i2c_piix4 i2c_core container ac button shpchp pci_hotplug
> intel_agp agpgart evdev ext3 jbd mbcache sg sr_mod cdrom sd_mod pata_acpi
> floppy ehci_hcd pcnet32 mii mptspi mptscsih mptbase scsi_transport_spi
> uhci_hcd ata_piix ata_generic libata scsi_mod dock usbcore thermal processor
> fan
>
> Pid: 4565, comm: rm Not tainted (2.6.26.3-unionfs #2)
> EIP: 0060:[<d0a8f127>] EFLAGS: 00010256 CPU: 0
> EIP is at __unionfs_file_revalidate+0xc7/0xd00 [unionfs]
> EAX: d6448d50 EBX: ce927bc0 ECX: cf20ee00 EDX: 00000000
> ESI: 00000001 EDI: cebfda00 EBP: 00000000 ESP: cea47e58
> DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
> Process rm (pid: 4565, ti=cea46000 task=ce3256b0 task.ti=cea46000)
> Stack: 00000000 00000000 00000000 00000000 00000000 00000000 cebfda00
> cf7e621c
> cf20ee00 00000000 00000000 00000000 00000000 00000000 00000000
> 00000001
> cf7e621c 00000000 d0a8685f 00000000 ce927ba0 00000001 00000001
> cf7e621c
> Call Trace:
> [<d0a8685f>] __unionfs_d_revalidate_one_locked+0x5f/0x140 [unionfs]
> [<d0a86bad>] __unionfs_d_revalidate_chain+0x26d/0x3a0 [unionfs]
> [<c017d719>] cp_new_stat64+0xf9/0x110
> [<d0a8fdbd>] unionfs_file_revalidate+0x5d/0x90 [unionfs]
> [<c0186aa0>] filldir64+0x0/0xe0
> [<d0a90ed3>] unionfs_readdir+0x53/0x2a0 [unionfs]
> [<c0186aa0>] filldir64+0x0/0xe0
> [<c017dc5e>] sys_fstat64+0x1e/0x30
> [<c0186aa0>] filldir64+0x0/0xe0
> [<c0186cf3>] vfs_readdir+0x93/0xb0
> [<c0186d7f>] sys_getdents64+0x6f/0xc0
> [<c0103e12>] syscall_call+0x7/0xb
> =======================
> Code: 1c 8b 0b 8b 42 54 89 4c 24 7c 39 48 10 0f 84 6b 08 00 00 8b 73 10 89 b4
> 24 80 00 00 00 8b 6c 24 7c 8b 43 14 8b 4c 24 20 c1 e5 02 <8b> 04 28 89 44 24
> 2c 8b 41 0c 8b 40 50 89 44 24 30 8b 44 24 7c
> EIP: [<d0a8f127>] __unionfs_file_revalidate+0xc7/0xd00 [unionfs] SS:ESP
> 0068:cea47e58
> Kernel panic - not syncing: Fatal exception
> Rebooting in 60 seconds..
I experience almost the same (using 2.3.3 on 2.6.25):
I was using 'clean-all' from the OpenVPN package
which basically also calls 'rm -rf somedir':
--8<--
smartbox easy-rsa # ./clean-all
rm: FATAL: failed to close directory `/etc/openvpn/ca/keys': Invalid argument
./clean-all: line 16: 1941 Segmentation fault mkdir "$KEY_DIR"
--8<--
Here's what I was able to save from the oops:
--8<--
Oops: 0002 [#1]
Pid: 1941, comm: clean-all Not tainted (2.6.25-gentoo-r1-net5501-1 #5)
EIP: 0060:[<c0208dcb>] EFLAGS: 00010246 CPU: 0
EIP is at __unionfs_file_revalidate+0x477/0x9e8
EAX: 00000000 EBX: dfa69ab0 ECX: 00000000 EDX: 000000
ESI: dcc1cd70 EDI: df3fc520 EBP: df3fcc20 ESP: df123dd8
2000 task=df835aa0 task.ti=df122000) SS: 0068
Stack: df40c0b8 00000000 dfab1000 df40c0b8 00000000 00000001 00000001 00000000
dfab1000 00000000 00000001 00000000 df3daa80 df3fcba0 00000000 00000000
dfab1000 dcf77318 00000000 df40c000 df40c0b8 00000001 00000001 c02008ac
Call Trace:
[<c02008ac>] __unionfs_d_revalidate_one_locked+0xa7/0xf8
[<c0200be0>] __unionfs_d_revalidate_chain+0x2e3/0x317
[<c0209395>] unionfs_file_revalidate+0x59/0x7a
[<c0201001>] unionfs_read+0x47/0xba
[<c0200fba>] unionfs_read+0x0/0xba
[<c014500d>] vfs_read+0x81/0xf4
[<c0147791>] kernel_read+0x32/0x43
[<c01666c9>] load_elf_binary+0x26c/0x1105
[<c01376a6>] get_user_pages+0x225/0x282
[<c01473fa>] get_arg_page+0x2a/0x79
[<c0147646>] copy_strings+0x163/0x16d
[<c01476b0>] search_binary_handler+0x39/0xd9
[<c014841c>] do_execve+0x111/0x157
[<c01020d7>] sys_execve+0x2a/0x4e
[<c0103586>] syscall_call+0x7/0xb
[<c03c0000>] pci_scan_child_bus+0x1b/0x76
=======================
Code: fe 8b 4c 24 40 c1 e3 04 8b 81 50 01 00 00 03 58 20 ff 43 04 8b 45 68 8b
10 85 d2 79 04 0f 0b eb fe 8b 40 10 8d 0c 95 00 00 00 00 <89> 3c 08 8b 45 68 8b
58 14 8b 45 0c
EIP: [<c0208dcb>] __unionfs_file_revalidate+0x477/0x9e8 SS:ESP 0068:df123dd8
---[ end trace 26006d67bc3b04a8 ]---
--8<--
Thanks.
--
Regards,
Wolfram Schlich <[EMAIL PROTECTED]>
Gentoo Linux * http://dev.gentoo.org/~wschlich/
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