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| author | Li RongQing <lirongqing@baidu.com> | 2022-03-09 16:35:44 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-04-02 05:37:27 -0400 |
| commit | c15e0ae42c8e5a61e9aca8aac920517cf7b3e94e (patch) | |
| tree | 01f20370844c03faa0d6d7e5b5975ed11e453143 /arch/x86/kvm/cpuid.c | |
| parent | 2a8859f373b0a86f0ece8ec8312607eacf12485d (diff) | |
| download | linux-c15e0ae42c8e5a61e9aca8aac920517cf7b3e94e.tar.bz2 | |
KVM: x86: fix sending PV IPI
If apic_id is less than min, and (max - apic_id) is greater than
KVM_IPI_CLUSTER_SIZE, then the third check condition is satisfied but
the new apic_id does not fit the bitmask. In this case __send_ipi_mask
should send the IPI.
This is mostly theoretical, but it can happen if the apic_ids on three
iterations of the loop are for example 1, KVM_IPI_CLUSTER_SIZE, 0.
Fixes: aaffcfd1e82 ("KVM: X86: Implement PV IPIs in linux guest")
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Message-Id: <1646814944-51801-1-git-send-email-lirongqing@baidu.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/cpuid.c')
0 files changed, 0 insertions, 0 deletions