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| author | Paolo Bonzini <pbonzini@redhat.com> | 2015-06-24 14:11:27 +0200 |
|---|---|---|
| committer | Eduardo Habkost <ehabkost@redhat.com> | 2015-07-07 10:47:16 -0300 |
| commit | 06ef227e5158cca6710e6c268d6a7f65a5e2811b (patch) | |
| tree | 13fa89ccf2c3e436248763e896907c758957cbe0 | |
| parent | 28b8e4d0bf93ba176b4b7be819d537383c5a9060 (diff) | |
target-i386: avoid overflow in the tsc-frequency property
The TSC frequency fits comfortably in an int when expressed in kHz,
but it may overflow when converted to Hz. In this case,
tsc-frequency returns a negative value because x86_cpuid_get_tsc_freq
does a 32-bit multiplication before assigning to int64_t.
For simplicity just make tsc_khz a 64-bit value.
Spotted by Coverity.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
| -rw-r--r-- | target-i386/cpu.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/target-i386/cpu.h b/target-i386/cpu.h index 0bfe64c5b9..14dced08a7 100644 --- a/target-i386/cpu.h +++ b/target-i386/cpu.h @@ -962,7 +962,7 @@ typedef struct CPUX86State { uint8_t has_error_code; uint32_t sipi_vector; bool tsc_valid; - int tsc_khz; + int64_t tsc_khz; void *kvm_xsave_buf; uint64_t mcg_cap; |