Messages in this thread | | | Date | Mon, 28 May 2007 10:22:30 +0300 | From | "Pekka Enberg" <> | Subject | Re: tty-related oops in latest kernel(s)? |
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Hi Tero,
(I am cc'ing Alan as he's been working on tty code recently.)
On 5/27/07, Tero Roponen <teanropo@jyu.fi> 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
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