Re: svgatextmode II

[Aivils <ai...@un...>]

On Sunday 20 March 2005 19:49, Hugo Vanwoerkom wrote:
> Hi!
>=20
> 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!
>=20
> Oops occurs here:
>=20
> (gdb) l *0xc0202d49
> 0xc0202d49 is in vt_ioctl
> (drivers/char/vt_ioctl.c:1342).
> 1337=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0for (i =
=3D 0; i < vc->display_fg->vc_count; i++)
> {
> 1338=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0struct vc_data *tmp =3D
> vc->display_fg->vc_cons[i];

Please add here:
if (!tmp)
	continue;
Here is to match linux-ruby, i couldn't send file to You.
> 1339=A0=A0=A0=A0
> 1340=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0acquire_console_sem();
> 1341=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0if (vlin)
> 1342=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0tmp->vc_scan_lines =3D vlin;
> 1343=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0if (clin)
> 1344=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0tmp->vc_font.height =3D clin;
> 1345=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0vc_resize(tmp, cc, ll);
> 1346=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0release_console_sem();
> (gdb) q
>=20
> and the oops I posted earlier:
>=20
> kernel: Unable to handle kernel NULL pointer
> dereference at virtual address 00000010
> kernel: =A0printing eip:
> kernel: c01ffb43
> kernel: *pde =3D 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: =A0 =A00
> kernel: EIP: =A0 =A00060:[vt_ioctl+6723/7344] =A0 =A0Not
> tainted VLI
> kernel: EFLAGS: 00013206 =A0 (2.6.11-ruby)=20
> kernel: EIP is at vt_ioctl+0x1a43/0x1cb0
> kernel: eax: efa40000 =A0 ebx: 00000000 =A0 ecx: 00000300=20
> =A0edx: 00002711
> kernel: esi: 00000006 =A0 edi: c1613000 =A0 ebp: 00000300=20
> =A0esp: efa41e60
> kernel: ds: 007b =A0 es: 007b =A0 ss: 0068
> kernel: Process SVGATextMode (pid: 2736,
> threadinfo=3Defa40000 task=3Dee8440e0)
> kernel: Stack: eea1f400 00000064 00000030 efb01c8c
> efb55005 00000004 00000064 00000030=20
> kernel: =A0 =A0 =A0 =A000000010 00000300 0010c4e0 00300064
> efa41ed8 00000000 efb55009 00000000=20
> kernel: =A0 =A0 =A0 =A0efb55009 00000000 c015ce18 efc3bc04
> efa41ed4 efa41ed0 efc3bc04 efb01c8c=20
> kernel: Call Trace:
> kernel: =A0[link_path_walk+2232/2944]
> link_path_walk+0x8b8/0xb80
> kernel: =A0[tty_open+539/768] tty_open+0x21b/0x300
> kernel: =A0[tty_open+0/768] tty_open+0x0/0x300
> kernel: =A0[chrdev_open+177/336] chrdev_open+0xb1/0x150
> kernel: =A0[tty_ioctl+886/1248] tty_ioctl+0x376/0x4e0
> kernel: =A0[do_ioctl+88/128] do_ioctl+0x58/0x80
> kernel: =A0[vfs_ioctl+106/464] vfs_ioctl+0x6a/0x1d0
> kernel: =A0[get_unused_fd+88/176]
> get_unused_fd+0x58/0xb0
> kernel: =A0[sys_ioctl+69/128] sys_ioctl+0x45/0x80
> kernel: =A0[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=20
>=20