x86: Fix oops in identify_cpu() on CPUs without CPUID

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Kernel is broken for x86 CPUs without CPUID since 2.6.28. It
crashes with NULL pointer dereference in identify_cpu():

766        generic_identify(c);
767
768-->     if (this_cpu->c_identify)
769               this_cpu->c_identify(c);

this_cpu is NULL. This is because it's only initialized in
get_cpu_vendor() function, which is not called if the CPU has
no CPUID instruction.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
LKML-Reference: <200908112000.15993.linux@rainbow-software.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

...

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Ondrej Zary 2009-08-11 20:00:11 +02:00 • committed by Ingo Molnar

parent fbd8b1819e

commit e8055139d9

1 changed files with 24 additions and 24 deletions

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arch/x86/kernel/cpu/common.c

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