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Bug#386497: confirming here, also with serial console

Hi folks--

i can also duplicate this bug on a mixed sarge/sarge-backports machine
with a serial console.

I haven't had the chance yet to try the workaround jan wagner has
suggested.  The errors from the console look like this:

00:06: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
hw_random: RNG not detected
pci_hotplug: PCI Hot Plug PCI Core version: 0.5
shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
BUG: unable to handle kernel NULL pointer dereference at virtual address 0000000c
 printing eip:
*pde = 00000000
Oops: 0000 [#1]
Modules linked in: shpchp pci_hotplug i2c_i801 psmouse i2c_core 8250_pnp e752x_edac evdev serio_raw edac_mc rtc floppy pcspkr ext3 jbd mbcache dm_mirror dm_snapshot dm_
CPU:    3
EIP:    0060:[<b02090d4>]    Not tainted VLI
EFLAGS: 00010206   (2.6.17-2-686 #1) 
EIP is at uart_write_room+0x9/0x16
eax: dfdbfc00   ebx: 00000006   ecx: 00000006   edx: 00000000
esi: dfd87800   edi: dfaedf28   ebp: ef27c800   esp: dfaedecc
ds: 007b   es: 007b   ss: 0068
Process S03udev (pid: 2374, threadinfo=dfaec000 task=dfafca50)
Stack: b01fc704 fffffff2 00000000 dfaedf28 00000006 b01fdfb2 ef27c800 ef27c800 
       ef5c2cc0 dfd87800 00000000 dfafca50 b01193f1 00000000 00000000 b0147b6d 
       080c2de8 00000012 00000000 dfafca50 b01193f1 dfd87938 dfd87938 ef036a7c 
Call Trace:
 <b01fc704> opost_block+0x13/0x107  <b01fdfb2> write_chan+0x118/0x1d7
 <b01193f1> default_wake_function+0x0/0xc  <b0147b6d> do_wp_page+0x88/0x293
 <b01193f1> default_wake_function+0x0/0xc  <b01f9d3a> tty_write+0x14b/0x1d8
 <b01fde9a> write_chan+0x0/0x1d7  <b01f9de3> redirected_tty_write+0x1c/0x71
 <b015607a> vfs_write+0xad/0x14e  <b01561b9> sys_write+0x3c/0x62
 <b0102b4f> syscall_call+0x7/0xb 
Code: a9 8b 54 24 04 8b 44 24 08 e8 b7 52 07 00 8b 44 24 10 e8 4b fb ff ff 8b 04 24 83 c4 14 5b 5e 5f 5d c3 8b 80 80 01 00 00 8b 50 10 <8b> 42 0c 2b 42 08 48 25 ff 0f 0
EIP: [<b02090d4>] uart_write_room+0x9/0x16 SS:ESP 0068:dfaedecc

The same machine boots fine with a backported 2.6.16-2-686 with a
serial console, though that kernel doesn't contain any modules named

Interestingly, i've also got panic=15 set as a kernel parameter, but
it is not triggering a reboot 15 seconds later as i expected it to.



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