Hi Tero,
(I am cc'ing Alan as he's been working on tty code recently.)
On 5/27/07, Tero Roponen <[email protected]> wrote:
2.6.22-rc3 (with Reiser4 patch) oopses when watching videos with
mplayer using neofb console.
[snip]
Ok, everything seems to work and I can watch the video.
However, when the mplayer stops I get these warnings:
release_dev: driver.table[3] not tty for (tty4)
Warning: dev (tty4) tty->count(3) != #fd's(2) in release_dev
release_dev: driver.table[3] not tty for (tty4)
So sanity check for reference counting failed.
When I try to repeat the previous step the kernel oopses:
neofb: no support for 32bpp
Mode (1024x768) larger than the LCD panel (800x600)
Mode (1152x864) larger than the LCD panel (800x600)
Mode (1024x1024) larger than the LCD panel (800x600)
Mode (1280x1024) larger than the LCD panel (800x600)
BUG: unable to handle kernel NULL pointer dereference at virtual address 00000731
printing eip:
c021e50e
*pde = 00000000
Oops: 0000 [#1]
Modules linked in: binfmt_misc floppy loop xirc2ps_cs pcmcia usb_storage parport_pc parport yenta_socket rsrc_nonstatic pcmcia_core evdev uhci_hcd usbcore
CPU: 0
EIP: 0060:[<c021e50e>] Not tainted VLI
EFLAGS: 00010202 (2.6.22-rc3-atr #4)
EIP is at vt_ioctl+0xda8/0x1482
eax: 00000679 ebx: 00005600 ecx: c3d41200 edx: 00000000
esi: 0893159c edi: c0386a2f ebp: 00000003 esp: c26a5e28
ds: 007b es: 007b fs: 0000 gs: 0033 ss: 0068
Process mplayer (pid: 1502, ti=c26a5000 task=c3a22500 task.ti=c26a5000)
Stack: fffffffe c26a5f30 c0149fd9 c29fe400 c3d68600 00000001 4642f7b0 c3d0bcc0
c3c32464 00000101 00000001 00000000 4644793c 4642f7b0 00000002 00000005
0000001b 00000005 c34ad240 c3d0bcc0 c1386000 00000002 00000000 c021d766
Call Trace:
[<c0149fd9>] link_path_walk+0xa5/0xaf
[<c021d766>] vt_ioctl+0x0/0x1482
[<c021a395>] tty_ioctl+0xa01/0xa87
[<c0143c5a>] get_empty_filp+0x4f/0xc9
[<c01439bf>] put_filp+0x14/0x31
[<c014ab93>] __path_lookup_intent_open+0x6c/0x75
[<c014ac10>] path_lookup_open+0x20/0x25
[<c014acd9>] open_namei+0x6e/0x51d
[<c0141b0c>] do_filp_open+0x25/0x39
[<c0219994>] tty_ioctl+0x0/0xa87
[<c014ba8a>] do_ioctl+0x3e/0x4d
[<c014bc84>] vfs_ioctl+0x1eb/0x202
[<c014bcce>] sys_ioctl+0x33/0x4d
[<c01022c2>] sysenter_past_esp+0x5f/0x85
=======================
Code: 0f b7 c8 7f 04 85 c9 75 cd 8d 4e 04 89 d8 e8 aa 11 fd ff e9 20 f8 ff ff 8d 04 95 00 00 00 00 03 81 b8 00 00 00 8b 00 85 c0 74 16 <83> b8 b8 00 00 00 00 74 0d 42 83 fa 3f 75 de b0 ff e9 88 f7 ff
EIP: [<c021e50e>] vt_ioctl+0xda8/0x1482 SS:ESP 0068:c26a5e28
Can we have your .config please? Also, could you work out the file and
line number of vt_ioctl+0xda8/0x1482 like this:
gdb vmlinux
(gdb) l *0xc021e50e
Pekka
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