Hi,
It took a while to reproduce the oops. The following is the
complete oops message for diagnosis:
kernel BUG at fs/unionfs/unionfs_debugmacros.h:291!
Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = c2ce8000
[00000000] *pgd=00000000
Internal error: Oops: 805 [#1]
Modules linked in: g_ether mv_usb_gadget reiserfs xfs
CPU: 0
PC is at __bug+0x48/0x5c
LR is at 0x1
pc : [<c0088c90>] lr : [<00000001>] Not tainted
sp : c0c1dcd8 ip : 60000093 fp : c0c1dcec
r10: c3bbedd8 r9 : c3c97228 r8 : c0068740
r7 : 00000000 r6 : c3c972b0 r5 : c3c97a20 r4 : 00000000
r3 : 00000000 r2 : 00000000 r1 : 00000000 r0 : 00000001
Flags: nZCv IRQs on FIQs on Mode SVC_32 Segment user
Control: A005317F Table: 02CE8000 DAC: 00000015
Process nmbd (pid: 5351, stack limit = 0xc0c1c1a0)
Stack: (0xc0c1dcd8 to 0xc0c1e000)
dcc0: c0069fb8 c144ba98
dce0: c0c1dda4 c0c1dcf0 c01d6ed0 c0088c58 c0069fb8 c0068740 00000000 00000000
dd00: 00000000 c0c1dd10 c00403ac c0024064 c20e0b48 c0c1dd38 c20e0b48 c20e0b48
dd20: c05d5400 c004b7a0 00000000 c0c1c000 60000093 c033eadc c3c972b0 c05d5000
dd40: c3c97228 c3bbedd8 c0c1dd74 c0c1dd58 c00225c0 c00a2fe8 00000000 c0c1dd68
dd60: c0c1c000 80000013 c0c1dd8c c0c1dd78 c0086984 c0022590 c144ba98 c00687c4
dd80: c0c1ddfc c144ba98 c00687c4 c033eadc c3c972b0 c05d5000 c0c1ddfc c0c1dda8
dda0: c019f7f0 c01d6128 c0068720 c033eadc c004c250 c00687c4 0000002d 00000000
ddc0: c0c1dde4 c0c1ddd0 00000000 00000000 c144ba98 c20e6ea8 00000000 c20e6e78
dde0: c3c972b0 c20e6e78 c3c97228 c3bbedd8 c0c1deac c0c1de00 c0192468 c019f6b4
de00: c006839c c033eadc c004c164 c0068370 00000262 00000000 c033eadc c033eadc
de20: 00000007 00000001 c1855300 00000000 c0c1de9c 00000000 00000000 c0c1df28
de40: 000081a4 c20e6ea8 00000277 c00681a4 00000000 00000000 00000001 c20e6e78
de60: 452fa491 00000000 452fa491 00000000 452fa491 00000000 000001a4 c20e6ea8
de80: c3c972b0 00000000 000001a4 c20e6ea8 c3c972b0 c0c1df28 c0c1c000 c22bf000
dea0: c0c1ded4 c0c1deb0 c00f1d84 c018fdd8 ffffffeb c3c972b0 c0c1df28 c0d2eee8
dec0: 00000005 00020442 c0c1df24 c0c1ded8 c00f2140 c00f1cfc c22dc3c0 c0d2eee8
dee0: c0c1df30 00000000 0000000a 000001a4 c04440c0 c3c972b0 c0d2eee8 00020441
df00: 000001a4 00000003 00000005 c004308c c0c1c000 c22bf000 c0c1df7c c0c1df28
df20: c00e2008 c00f1f94 c0d2eee8 c04440c0 583656c4 00000008 c22bf00f 00000300
df40: 00000000 00000000 c0c1c000 c22bf000 c0c1df7c c0c1df60 c00e2088 c00fd64c
df60: 00020442 000001a4 c22bf000 00020441 c0c1dfa4 c0c1df80 c00e2260 c00e1fe8
df80: 000001a4 00000441 2a0f84e4 00000005 c004308c 00900005 00000000 c0c1dfa8
dfa0: c0042900 c00e2228 000001a4 c008bc38 2a0f84e4 00020441 000001a4 00000000
dfc0: 000001a4 00000441 2a0f84e4 000001a4 2a0c47a0 beac79a8 2a0f26a4 00000012
dfe0: 2a0f28f4 beac7960 402716b0 402716cc 60000010 2a0f84e4 72282034 61656c65
Backtrace:
[<c0088c48>] (__bug+0x0/0x5c) from [<c01d6ed0>]
(__fist_print_dentry+0xdb8/0xfec)
r4 = C144BA98
[<c01d6118>] (__fist_print_dentry+0x0/0xfec) from [<c019f7f0>]
(unionfs_interpose+0x14c/0x1b90)
r8 = C05D5000 r7 = C3C972B0 r6 = C033EADC r5 = C00687C4
r4 = C144BA98
[<c019f6a4>] (unionfs_interpose+0x0/0x1b90) from [<c0192468>]
(unionfs_create+0x26a0/0x3120)
[<c018fdc8>] (unionfs_create+0x0/0x3120) from [<c00f1d84>]
(vfs_create+0x98/0xc0)
[<c00f1cec>] (vfs_create+0x0/0xc0) from [<c00f2140>] (open_namei+0x1bc/0x7ac)
r8 = 00020442 r7 = 00000005 r6 = C0D2EEE8 r5 = C0C1DF28
r4 = C3C972B0
[<c00f1f84>] (open_namei+0x0/0x7ac) from [<c00e2008>] (filp_open+0x30/0x50)
[<c00e1fd8>] (filp_open+0x0/0x50) from [<c00e2260>] (sys_open+0x48/0xd8)
r4 = 00020441
[<c00e2218>] (sys_open+0x0/0xd8) from [<c0042900>] (ret_fast_syscall+0x0/0x2c)
Code: eb0079e6 e59f0014 eb0079e4 e3a03000 (e5833000)
On 10/10/06, Josef Sipek <[EMAIL PROTECTED]> wrote:
On Mon, Oct 09, 2006 at 11:06:33PM +0200, Ram Kumar wrote:
> Exactly..it was an ARM based board running on 2.6.12 kernel and
> unionfs-1.1.5. This issue can be easily reproduced when I play with
> the network hotplug events (USB gadget interface esp).
Hrm.
> And as far as
> the first line is concerned, I guess it is something like "Modules
> linked in: xfs, reiserfs, usb_gadget g_ether". Is it related to the
> architecture (arm) ? (or could it be from the usb gadget driver
> implementation ?)
Please post the entire oops. At this point, I'm not even sure if it is an
Oops or a BUG.
Chances are that it is not related to the architecture.
Josef "Jeff" Sipek.
--
Research, n.:
Consider Columbus:
He didn't know where he was going.
When he got there he didn't know where he was.
When he got back he didn't know where he had been.
And he did it all on someone else's money.
_______________________________________________
unionfs mailing list
unionfs@mail.fsl.cs.sunysb.edu
http://www.fsl.cs.sunysb.edu/mailman/listinfo/unionfs
