Re: cat /proc/bus/pnp/escd -> kernel segfault (2.6 BK)

[Matthias Andree]

On Mon, 27 Oct 2003, Brian Gerst wrote:

> Does this patch fix it?

Unfortunately not. I am not seeing SIGSEGV or something, the machine
freezes hard instead.

> diff -urN linux-2.6.0-test9-bk/arch/i386/mm/extable.c linux/arch/i386/mm/extable.c
> --- linux-2.6.0-test9-bk/arch/i386/mm/extable.c	2003-07-27 13:11:40.000000000 -0400
> +++ linux/arch/i386/mm/extable.c	2003-10-27 12:08:38.000000000 -0500
> @@ -34,7 +34,7 @@
>  	const struct exception_table_entry *fixup;
>  
>  #ifdef CONFIG_PNPBIOS
> -	if (unlikely((regs->xcs | 8) == 0x88)) /* 0x80 or 0x88 */
> +	if (unlikely((unsigned)(regs->xcs - (GDT_ENTRY_PNPBIOS_BASE * 8)) < 16))
>  	{
>  		extern u32 pnp_bios_fault_eip, pnp_bios_fault_esp;
>  		extern u32 pnp_bios_is_utter_crap;


-- 
Matthias Andree

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