diff options
| author | Sean Christopherson <[email protected]> | 2022-04-15 00:43:41 +0000 |
|---|---|---|
| committer | Paolo Bonzini <[email protected]> | 2022-04-21 17:16:10 +0000 |
| commit | 2d08935682ac5f6bfb70f7e6844ec27d4a245fa4 (patch) | |
| tree | b4c9319b2267ebb8baf7986d0a87316c27f53440 /tools/perf/scripts/python/compaction-times.py | |
| parent | Merge tag 'kvm-riscv-fixes-5.18-2' of https://github.com/kvm-riscv/linux into... (diff) | |
| download | kernel-2d08935682ac5f6bfb70f7e6844ec27d4a245fa4.tar.gz kernel-2d08935682ac5f6bfb70f7e6844ec27d4a245fa4.zip | |
KVM: x86: Don't re-acquire SRCU lock in complete_emulated_io()
Don't re-acquire SRCU in complete_emulated_io() now that KVM acquires the
lock in kvm_arch_vcpu_ioctl_run(). More importantly, don't overwrite
vcpu->srcu_idx. If the index acquired by complete_emulated_io() differs
from the one acquired by kvm_arch_vcpu_ioctl_run(), KVM will effectively
leak a lock and hang if/when synchronize_srcu() is invoked for the
relevant grace period.
Fixes: 8d25b7beca7e ("KVM: x86: pull kvm->srcu read-side to kvm_arch_vcpu_ioctl_run")
Cc: [email protected]
Signed-off-by: Sean Christopherson <[email protected]>
Reviewed-by: Maxim Levitsky <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/compaction-times.py')
0 files changed, 0 insertions, 0 deletions