svgatextmode II

[Hugo V. <hvw...@ya...>]

Hi!

Strangest thing: if on 2.6.9-ruby.vz9x1 (but I think
this is not specific to that version) I run
svgatextmode 2x, the first time it oopses and the
second time it runs!

Oops occurs here:

(gdb) l *0xc0202d49
0xc0202d49 is in vt_ioctl
(drivers/char/vt_ioctl.c:1342).
1337			for (i = 0; i < vc->display_fg->vc_count; i++)
{
1338				struct vc_data *tmp =
vc->display_fg->vc_cons[i];
1339	
1340				acquire_console_sem();
1341				if (vlin)
1342					tmp->vc_scan_lines = vlin;
1343				if (clin)
1344					tmp->vc_font.height = clin;
1345				vc_resize(tmp, cc, ll);
1346				release_console_sem();
(gdb) q

and the oops I posted earlier:

kernel: Unable to handle kernel NULL pointer
dereference at virtual address 00000010
kernel:  printing eip:
kernel: c01ffb43
kernel: *pde = 00000000
kernel: Oops: 0002 [#1]
kernel: Modules linked in: usbhid uhci_hcd usbcore
pcspkr via686a i2c_sensor i2c_isa i2c_core ide_scsi sg
cs4232 ad1848 uart401 rtc
kernel: CPU:    0
kernel: EIP:    0060:[vt_ioctl+6723/7344]    Not
tainted VLI
kernel: EFLAGS: 00013206   (2.6.11-ruby) 
kernel: EIP is at vt_ioctl+0x1a43/0x1cb0
kernel: eax: efa40000   ebx: 00000000   ecx: 00000300 
 edx: 00002711
kernel: esi: 00000006   edi: c1613000   ebp: 00000300 
 esp: efa41e60
kernel: ds: 007b   es: 007b   ss: 0068
kernel: Process SVGATextMode (pid: 2736,
threadinfo=efa40000 task=ee8440e0)
kernel: Stack: eea1f400 00000064 00000030 efb01c8c
efb55005 00000004 00000064 00000030 
kernel:        00000010 00000300 0010c4e0 00300064
efa41ed8 00000000 efb55009 00000000 
kernel:        efb55009 00000000 c015ce18 efc3bc04
efa41ed4 efa41ed0 efc3bc04 efb01c8c 
kernel: Call Trace:
kernel:  [link_path_walk+2232/2944]
link_path_walk+0x8b8/0xb80
kernel:  [tty_open+539/768] tty_open+0x21b/0x300
kernel:  [tty_open+0/768] tty_open+0x0/0x300
kernel:  [chrdev_open+177/336] chrdev_open+0xb1/0x150
kernel:  [tty_ioctl+886/1248] tty_ioctl+0x376/0x4e0
kernel:  [do_ioctl+88/128] do_ioctl+0x58/0x80
kernel:  [vfs_ioctl+106/464] vfs_ioctl+0x6a/0x1d0
kernel:  [get_unused_fd+88/176]
get_unused_fd+0x58/0xb0
kernel:  [sys_ioctl+69/128] sys_ioctl+0x45/0x80
kernel:  [syscall_call+7/11] syscall_call+0x7/0xb
kernel: Code: dd 89 5c 24 24 89 54 24 1c 89 4c 24 18
0f b7 54 24 2a 89 54 24 20 8b 9c b0 cc 10 00 00 e8 86
7d f1 ff 66 85 ed 74 07 8b 4c 24 24 <89> 4b 10 66 83
7c 24 2a 00 74 07 8b 44 24 20 89 43 5c 8b 54 24 


Can anybody shed light on that?

Hugo




		
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