Re: [bug] drivers/char/serial.c causes NULL ptr deref. OOPS w/

David Ford (david@kalifornia.com)
Mon, 05 Jun 2000 01:16:55 -0700

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Andrey Panin wrote:

> > if (!res)
> > return 0;
> >
> if (res->next)
> return 1;
>
> Did you encounter ISA PnP device without resources ???!!!
> Very interesting, post me a copy of /proc/isapnp file, please.
>
> This sanity check seems ok, except that it should return 1, indicating
> that device guessing is failed.

Here's the file, how is this instead:

if (!res || res->next)
return 1;

-d

--
"The difference between 'involvement' and 'commitment' is like an
eggs-and-ham breakfast: the chicken was 'involved' - the pig was
'committed'."






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Card 1 'OPT0931:OPTi Audio 16' PnP version 1.0
  Logical device 0 'OPTffff:AUX0'
    Device is active
  Logical device 1 'OPT9310:OPTi Audio 16'
    Device is not active
    Active port ,0xe00
    Resources 0
      Priority acceptable
      Port 0x534-0x608, align 0x3, size 0x4, 16-bit address decoding
      Port 0x380-0x3f0, align 0xf, size 0xc, 16-bit address decoding
      Port 0x220-0x240, align 0x1f, size 0x10, 16-bit address decoding
      Port 0xe0c-0xffc, align 0x3, size 0x4, 16-bit address decoding
      IRQ 5,7,10 High-Edge
      DMA 0,1,3 8-bit byte-count type-A
      DMA 0,1,3,5,6 8-bit&16-bit byte-count word-count type-A
      Alternate resources 0:1
        Priority acceptable
        Port 0x534-0xff0, align 0x3, size 0x4, 16-bit address decoding
        Port 0x380-0x3f0, align 0xf, size 0xc, 16-bit address decoding
        Port 0x220-0x240, align 0x1f, size 0x10, 16-bit address decoding
        Port 0xe0c-0xffc, align 0x3, size 0x4, 16-bit address decoding
        IRQ 5,7,2/9,10,11 High-Edge
        DMA 0,1,3,5,6 8-bit&16-bit byte-count word-count type-A
        DMA 0,1,3,5,6 8-bit&16-bit byte-count word-count type-A
      Alternate resources 0:2
        Priority acceptable
        Port 0x534-0x608, align 0x3, size 0x4, 16-bit address decoding
        Port 0x380-0x3f0, align 0xf, size 0xc, 16-bit address decoding
        Port 0x220-0x240, align 0x1f, size 0x10, 16-bit address decoding
        Port 0xe0c-0xffc, align 0x3, size 0x4, 16-bit address decoding
        IRQ 5,7,10 High-Edge
        DMA 0,1,3 8-bit byte-count type-A
        DMA 0,1,3 8-bit byte-count type-A
      Alternate resources 0:3
        Priority acceptable
        Port 0x534-0xff0, align 0x3, size 0x4, 16-bit address decoding
        Port 0x380-0x3f0, align 0xf, size 0xc, 16-bit address decoding
        Port 0x220-0x240, align 0x1f, size 0x10, 16-bit address decoding
        Port 0xe0c-0xffc, align 0x3, size 0x4, 16-bit address decoding
        IRQ 5,7,2/9,10,11 High-Edge
        DMA 0,1,3 8-bit byte-count type-A
        DMA 0,1,3 8-bit byte-count type-A
      Alternate resources 0:4
        Priority acceptable
        Port 0x534-0xff0, align 0x3, size 0x4, 16-bit address decoding
        Port 0x380-0x3f0, align 0xf, size 0xc, 16-bit address decoding
        Port 0x220-0x240, align 0x1f, size 0x10, 16-bit address decoding
        Port 0xe0c-0xffc, align 0x3, size 0x4, 16-bit address decoding
        IRQ 5,7,2/9,10,11 High-Edge
        DMA 0,1,3 8-bit byte-count type-A
  Logical device 2 'OPT0001:Game Port'
    Device is not active
    Resources 0
      Priority preferred
      Port 0x200-0x20f, align 0x0, size 0x1, 16-bit address decoding
  Logical device 3 'OPT0002:MPU401'
    Device is not active
    Resources 0
      Priority preferred
      Port 0x300-0x360, align 0xf, size 0x2, 16-bit address decoding
      IRQ 5,7,2/9,10,11 High-Edge


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