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| author |   Ondrej Zary <linux@rainbow-software.org> | 2009-08-11 20:00:11 +0200 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2009-08-12 11:49:41 +0200 |
| commit | e8055139d996e85722984968472868d6dccb1490 (patch) | |
| tree | daf1dcd35c814da2c282a3f31ab683fb79ba4bb9 /kernel/mutex-debug.c | |
| parent | x86: Clear incorrectly forced X86_FEATURE_LAHF_LM flag (diff) | |
| download | wireguard-linux-e8055139d996e85722984968472868d6dccb1490.tar.xz wireguard-linux-e8055139d996e85722984968472868d6dccb1490.zip | |
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>
Diffstat (limited to 'kernel/mutex-debug.c')
0 files changed, 0 insertions, 0 deletions