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| author | Wanpeng Li <wanpengli@tencent.com> | 2021-06-10 21:59:33 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-06-11 11:53:48 -0400 |
| commit | dfdc0a714d241bfbf951886c373cd1ae463fcc25 (patch) | |
| tree | 61023aeb6622cfe75b6ed43f6b5099b18de55747 /arch | |
| parent | 934002cd660b035b926438244b4294e647507e13 (diff) | |
| download | lwn-dfdc0a714d241bfbf951886c373cd1ae463fcc25.tar.gz lwn-dfdc0a714d241bfbf951886c373cd1ae463fcc25.zip | |
KVM: X86: Fix x86_emulator slab cache leak
Commit c9b8b07cded58 (KVM: x86: Dynamically allocate per-vCPU emulation context)
tries to allocate per-vCPU emulation context dynamically, however, the
x86_emulator slab cache is still exiting after the kvm module is unload
as below after destroying the VM and unloading the kvm module.
grep x86_emulator /proc/slabinfo
x86_emulator 36 36 2672 12 8 : tunables 0 0 0 : slabdata 3 3 0
This patch fixes this slab cache leak by destroying the x86_emulator slab cache
when the kvm module is unloaded.
Fixes: c9b8b07cded58 (KVM: x86: Dynamically allocate per-vCPU emulation context)
Cc: stable@vger.kernel.org
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Message-Id: <1623387573-5969-1-git-send-email-wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/x86.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 54d212fe9b15..6d425310054b 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -8261,6 +8261,7 @@ void kvm_arch_exit(void) kvm_x86_ops.hardware_enable = NULL; kvm_mmu_module_exit(); free_percpu(user_return_msrs); + kmem_cache_destroy(x86_emulator_cache); kmem_cache_destroy(x86_fpu_cache); #ifdef CONFIG_KVM_XEN static_key_deferred_flush(&kvm_xen_enabled); |