| commit | e8055139d996e85722984968472868d6dccb1490 | |
| author | Ondrej Zary <linux@rainbow-software.org> | |
| Tue, 11 Aug 2009 18:00:11 +0000 (11 20:00 +0200) | ||
| committer | Ingo Molnar <mingo@elte.hu> | |
| Wed, 12 Aug 2009 09:49:41 +0000 (12 11:49 +0200) | ||
| tree | daf1dcd35c814da2c282a3f31ab683fb79ba4bb9 | treesnapshot (tar.gz zip) |
| parent | fbd8b1819e80ac5a176d085fdddc3a34d1499318 | commitdiff |
x86: Fix oops in identify_cpu() on CPUs without CPUID
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>
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>
| arch/x86/kernel/cpu/common.c | diffblobblamehistory |