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authorWanpeng Li <wanpengli@tencent.com>2021-06-10 21:59:33 -0700
committerPaolo Bonzini <pbonzini@redhat.com>2021-06-11 11:53:48 -0400
commitdfdc0a714d241bfbf951886c373cd1ae463fcc25 (patch)
tree61023aeb6622cfe75b6ed43f6b5099b18de55747 /arch
parent934002cd660b035b926438244b4294e647507e13 (diff)
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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.c1
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);