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| author | Maxim Levitsky <[email protected]> | 2022-10-25 12:47:32 +0000 |
|---|---|---|
| committer | Paolo Bonzini <[email protected]> | 2022-10-28 10:10:30 +0000 |
| commit | 696db303e54f7352623d9f640e6c51d8fa9d5588 (patch) | |
| tree | b9b0ef36715305cf7aaec067d78ece54eca06a05 /lib/test-string_helpers.c | |
| parent | KVM: x86: emulator: update the emulation mode after CR0 write (diff) | |
| download | kernel-696db303e54f7352623d9f640e6c51d8fa9d5588.tar.gz kernel-696db303e54f7352623d9f640e6c51d8fa9d5588.zip | |
KVM: x86: smm: number of GPRs in the SMRAM image depends on the image format
On 64 bit host, if the guest doesn't have X86_FEATURE_LM, KVM will
access 16 gprs to 32-bit smram image, causing out-ouf-bound ram
access.
On 32 bit host, the rsm_load_state_64/enter_smm_save_state_64
is compiled out, thus access overflow can't happen.
Fixes: b443183a25ab61 ("KVM: x86: Reduce the number of emulator GPRs to '8' for 32-bit KVM")
Signed-off-by: Maxim Levitsky <[email protected]>
Reviewed-by: Sean Christopherson <[email protected]>
Message-Id: <[email protected]>
Cc: [email protected]
Signed-off-by: Paolo Bonzini <[email protected]>
Diffstat (limited to 'lib/test-string_helpers.c')
0 files changed, 0 insertions, 0 deletions